7th Physiology Lecture Exam - Endocrine System (Batch 2024)

Question 1

1.Which of the following has a negative input to the SCN and pituitary gland?.
a. Constant conditions of light/ dark
b. Melatonin
c. Stress
d. Cytokines

Answer 1

b. Melatonin

Question 2

2.Features of the pituitary trophic hormones.
a. Generally can regulate directly physiological responses.
b. Exerts negative-feedback regulation to parvocellular releasing hormones.
c. Binds to cognate receptors on peripheral endocrine glands.
d. Functions autonomously from other parts of the endocrine axes.

Answer 2

c. Binds to cognate receptors on peripheral endocrine glands.

Question 3

3.Maintenance of blood glucose during the fasting phase occurs through the following, except?.
a. Requires precursors lactate, amino acids and glycerol.
b. Skeletal myocytes switches to gluconeogenic fuel.
c. Degradation of proteins in body tissues.
d. Driven by glucagon and catecholamines.

Answer 3

b. Skeletal myocytes switches to gluconeogenic fuel.

Question 4

4.Glucotoxicity from poorly controlled diabetes can cause damage to microvascular endothelial cells because of the following, except?.
a. Altered protein and lipid structures
b. Oxidative stress
c. Altered signaling pathways
d. Preservation of intracellular components

Answer 4

d. Preservation of intracellular components

Question 5

5.Hepatocytes, skeletal myocytes and adipocytes during the digestive phase?.
a. Use primarily glucose stimulated by insulin
b. Express the GLUT4 transporter.
c. Can store an infinite amount of glucose.
d. FFA are used in anabolic pathways.

Answer 5

a. Use primarily glucose stimulated by insulin

Question 6

6.Which hormone is synthesized by organs with a primary function other than endocrine?.
a. GH
b. PTH
c. TRH
d. Insulin

Answer 6

d. Insulin

Question 7

7.Which of these when a part of the HPP axes is damaged are usually most severe:.
a. Primary endocrine disorders
b. Secondary endocrine disorders
c. Tertiary endocrine disorders
d. B and C

Answer 7

a. Primary endocrine disorders

Question 8

8.Damage to the pituitary stalk will disrupt the action of which of the following hormone?.
a. PRL
b. TSH
c. FSH
d. ACTH
e. B, C, D

Answer 8

e. B, C, D

Feeds:
a. PRL

Question 9

9.The magnocellular neurons are described as the following.
a. Large cell bodies that project axons to the pars nervosa.
b. They are located in the SON and PVN.
c. Each individual neuron is hormone specific.
d. Synthesize preprohormones neurophysin I and II.

Answer 9

d. Synthesize preprohormones neurophysin I and II.

Neurophysin 1 = ADH
Neurophysin 2= Oxytocin

Question 10

10.The SCN impose a circadian rhythm by?.
a. Neuronal signals which modulate release of the pituitary gland hormones thereby controlling the endocrine axis.
b. Circadian rhythm can be assigned by the light- dark cycle by the earth’s rotation.
c. Neuronal input is generated from specialized light-sensitive retinal cells identical to rods and cones.
d. Melatonin from the pineal gland may transmit that daytime is present.

Answer 10

b. Circadian rhythm can be assigned by the light- dark cycle by the earth’s rotation.

Question 11

11.The activity of insulin in hepatocytes, myocytes and adipocytes are orchestrated by Akt protein kinase signaling pathway. Which of the following statements about this pathway is incorrect?.
a. Translocation of GLUT4 glucose transporter, which allow import of glucose in hepatocytes, myocytes and adipocytes.
b. Activation of Protein Phosphatases which regulates multiple metabolic enzymes.
c. Activation of Mechanistic Target of Rapamycin Complex 1 which promote protein synthesis.
d. Activation of Sterol Response Element Binding Protein1 which orchestrates glycolysis and DNL.

Answer 11

a. Translocation of GLUT4 glucose transporter, which allow import of glucose in hepatocytes, myocytes and adipocytes.

Question 12

12.The following are important features of the endocrine axes, except:.
a. Secreted in a pulsatile manner.
b. Complex neurogenic states alter function.
c. Semiautonomous physiologic effect.
d. Narrow maintained set point.

Answer 12

d. Narrow maintained set point.

Question 13

13.Insulin resistance is the result of which of the following?.
a. Ligand-receptor binding
b. Receptor antagonists bind to a receptor
c. Loss or inactivation of receptors
d. Constitutive activation of a receptor

Answer 13

c. Loss or inactivation of receptors

Question 14

14.Endocrine signaling are characterized by the following, which one is not correct?.
a. Controlled secretion of an extracellular signaling molecule into the extracellular fluid.
b. Dispersal of the molecule into the vasculature and transmission throughout the body.
c. Collection of the molecule in the vascular compartment and into the extracellular space.
d. Molecules attach to specific receptors within cells of a target organ.

Answer 14

c. Collection of the molecule in the vascular compartment and into the extracellular space.

Question 15

15.Inhibition of GH synthesis and release is by:.
a. Somatostatin
b. Ghrelin
c. GHBP
d. VIP

Answer 15

a. Somatostatin

GH = Somatostatin
IGF-1 = Somatomedin

Question 16

16.Traumatic brain injury that affects the hypothalamus will cause?.
a. Primary adrenal insufficiency
b. Secondary adrenal insufficiency
c. Tertiary adrenal insufficiency
d. A and C

Answer 16

c. Tertiary adrenal insufficiency

Question 17

17.Most cells use glucose as fuel by performing the following:.
a. By using GLUT transporters, they import glucose into the cell in one direction.
b. Cells convert glucose into G6P which cannot pass back through GLUT transporters.
c. Cells with mitochondria metabolize G6P, then ferment pyruvate to lactate
d. Cells without mitochondria convert pyruvate to acetyl CoA.

Answer 17

b. Cells convert glucose into G6P which cannot pass back through GLUT transporters.

Question 18

18.The following statements are true regarding fates of energy during the fasting phase.
a. Release of glucose derived from glycogenolysis which is continuous throughout.
b. Glucose are produced/ maintain through short lived gluconeogenesis.
c. Adipocytes undergo De Novo Lipogenesis.
d. Release of Amino acids which undergo proteolysis

Answer 18

d. Release of Amino acids which undergo proteolysis

Question 19

19.Which hormone is produced to a significant degree by peripheral conversion?.
a. GnRH
b. TSH
c. Angiotensin II
d. LH

Answer 19

c. Angiotensin II

Question 20

20.The following are general occurrences during the digestive phase, except?.
a. Absorbed fuels are partitioned and used for different purposes.
b. Monomeric and polymeric fuels are digested and absorbed.
c. All aspects of metabolism are regulated by insulin.
d. The primary fuel used for energy is glucose.

Answer 20

b. Monomeric and polymeric fuels are digested and absorbed.

Question 21

21.In order to stimulate thyroid epithelium, parvocellular neurons release:.
a. TSH
b. TRH
c. Triiodothyronine
d. GPCR

Answer 21

b. TRH

Question 22

22.During the digestive phase, hepatocytes metabolize glucose for the following reason. Which is not included?.
a. Utilization for ATP
b. Stored as glycogen
c. De Novo Lipogenesis
d. Use of alternative fuel for ATP

Answer 22

d. Use of alternative fuel for ATP

Question 23

23.Which of the following is a feature of a response-driven negative feedback loop?.
a. A hormone acts on target organs to induce a change in circulating component and the circulating component inhibits secretion of the hormone.
b. Secretion of a hormone is stimulated or inhibited by a change in the level of a specific extracellular parameter and the change in parameter inhibits further secretion of the hormone.
c. A hormone increases levels of a specific component, and this component stimulates secretion of the hormone.
d. Releasing hormones are secreted which stimulates or inhibits the production and secretion of trophic hormones, which stimulates or inhibits secretion of peripheral hormones which inhibits releasing or trophic hormones

Answer 23

b. Secretion of a hormone is stimulated or inhibited by a change in the level of a specific extracellular parameter and the change in parameter inhibits further secretion of the hormone.

Question 24

24.Corticotropin secretion is a function of:.
a. MC2R
b. POMC
c. CRH
d. MSH

Answer 24

c. CRH

MC2R is the receptor for ACTH, and MSH is a hormone that stimulates melanin production and has effects on appetite and sexual function.

Question 25

25.Which of the following classes of hormones are sparingly soluble in blood and aqueous fluids?. a. Proteins b. Peptides c. Catecholamines d. Iodothyronines

Answer 25

d. Iodothyronines

Question 26

26.The hypophysiotrophic region are characterized by which of the following:. a. Composed of parvocellular bodies which project axons to the median eminence. b. Releasing hormones enter a primary plexus then a secondary plexus of capillaries c. Fenestrated capillaries are linked by the hypothalamohypophyseal portal vessels. d. Releasing hormones diffuse out and bind to receptors on specific cell types.

Answer 26

c. Fenestrated capillaries are linked by the hypothalamohypophyseal portal vessels.

Question 27

27.Which of these classes of hormones circulate in the blood mostly in unbound form?. a. Proteins b. Catecholamines c. Steroids d. Iodothyronines

Answer 27

a. Proteins

Question 28

28.The following stimulates appetite except:. a. Neuropeptide γ b. Norepinephrine c. α MSH d. Ghrelin

Answer 28

c. α MSH FEED: d. Ghrelin

Question 29

29.During the fasting phase, hepatocytes, skeletal myocytes and adipocytes:. a. Function largely independently of each other. b. Provide alternative energy substrates. c. Maintain blood glucose below 60mg/dl. d. Convert glucose into FFA.

Answer 29

b. Provide alternative energy substrates.

Question 30

30.Which hormone are synthesized and secreted by dedicated endocrine glands:. a. ACTH b. Oxytocin c. ANP d. Ghrelin

Answer 30

c. ANP

Question 31

31.Mechanism of osteoporosis in Cushing’s syndrome is INCREASED: A. Bone resorption B. Intestinal Ca++ absorption C. Osteoblast function D. All of these

Answer 31

A. Bone resorption

Question 32

32.Hyperglycemia in cortisol excess is due to DECREASED A. Amino acid mobilization B. Enzyme activity C. Glucose transporters D. Insulin secretion

Answer 32

C. Glucose transporters

Question 33

33.Metabolic effect of glucocorticoids to INCREASE ____ proteins. A. Cellular B. Muscle C. Plasma D. All of these

Answer 33

C. Plasma

Question 34

34.One of these is the clinical manifestation of excess aldosterone: A. Altered sensorium B. Deep rapid breathing C. High blood pressure D. Irregular heart rate

Answer 34

C. High blood pressure

Question 35

35.Which of these is elevated in primary hypercortisolism? A. ACTH B. CRH C. Cortisol D. All of these

Answer 35

C. Cortisol

Question 36

36.Cushing’s disease is associated with LOW: A. ACTH B. CRF C. Cortisol D. All of these

Answer 36

C. Cortisol

Question 37

37.Aldosterone secretion is INCREASED in one of these conditions: A. Decreased renal blood flow B. Decreased serum K+ C. Increased serum Na+ D. Increased ACTH secretion

Answer 37

A. Decreased renal blood flow

Question 38

38.Destruction of zona glomerulosa leads to reduction of one of these hormones: A. Aldosterone B. Androgen C. Cortisol D. Estrogen

Answer 38

A. Aldosterone

Question 39

39.One of these conditions is associated with cortisol effect: A. Elevated ACTH secretion B. Elevated serum K+ C. Reduced ADH secretion D. Reduced serum Ca++

Answer 39

D. Reduced serum Ca++

Question 40

40.Hyperpigmentation In Addison’s is disease is due: A. High ACTH B. High aldosterone C. Low cortisol D. Low MSH

Answer 40

A. High ACTH

Question 41

41.Which of these hormones has the least affinity to mineralocorticoid receptors of renal epithelial cells? A. Aldosterone B. Cortisol C. Cortisone D. Fluorocortisol

Answer 41

C. Cortisone

Question 42

42.Most important anti-inflammatory effect of glucocorticoids is to DECREASE: A. Diameter of capillaries B. Formation of leukotrienes C. Migration of leukocytes D. Release of proteolytic enzymes

Answer 42

D. Release of proteolytic enzymes

Question 43

43.Primary regulator of cortisol secretion is: A. ACTH B. Renin-angiotensin. C. Serum K+ D. Serum Na+

Answer 43

A. ACTH

Question 44

44.Mechanism of metabolic acidosis in adrenocortical deficiency is DECREASED: A. Glomerular filtration rate due to sympathetic nervous stimulation B. H+ secretion due to aldosterone reduction C. H+ reabsorption due to cortisol reduction D. Renal blood flow due to renin-angiotensin stimulation

Answer 44

B. H+ secretion due to aldosterone reduction

Question 45

45.Addison’s disease is associated with: A. High blood sugar due to high cortisol B. High serum Na+ due to low cortisol C. Low blood pressure due to low aldosterone D. Low plasma H+ due to high aldosterone

Answer 45

C. Low blood pressure due to low aldosterone

Question 46

46.Conn’s syndrome has one of these clinical manifestations: A. Hypotension B. Muscle paralysis C. Palpitations D. Rapid, deep breathing

Answer 46

B. Muscle paralysis

Question 47

47.Physiologic effect of aldosterone is increased reabsorption of: A. H+ B. K+ C. Na+ D. All of these

Answer 47

C. Na+

Question 48

48.Muscle weakness in cortisol excess is due to INCREASED: A. Gluconeogenesis B. Glycolysis C. Lipolysis D. Proteolysis

Answer 48

D. Proteolysis

Question 49

49.Hirsutism in Cushing’s syndrome is due to HIGH: A. ACTH B. Androgen C. Glucocorticoids D. Mineralocorticoids

Answer 49

B. Androgen

Question 50

50.Hypertension associated with hypersecretion of aldosterone is due to INCREASED: A. Na+ and water excretion B. Plasma volume C. Serum K+ D. Sympathetic nervous system stimulation

Answer 50

B. Plasma volume Inc Na+ reab > inc plasma [Na+] > inc osmolality (blood) > activates thirst receptors; inc ADH secretion > stimulate water reab (DCT & CD) = inc ECFV - Aldosterone mediated inc ECFV (>1 day) > inc BP

Question 51

51.What is the True statement regarding the thyroid gland? A. It is drained by two sets of thyroid veins on each side B. It receives a sympathetic innervation that is vasomotor C. It receives a sympathetic innervation that is secretomotor D. The lobes are connected by midventral lingula

Answer 51

It receives a sympathetic innervation that is vasomotor

Question 52

52.What is the major (90%) iodothyronine produces by the thyroid gland? A. 3,5,3,5’ tetraiodothyronine B. 5,3,5,3’ tetraiodothyronine C. 3,3,5’ triiodothyronine D. 3,5,3’ triiodothyronine

Answer 52

3,5,3,5’ tetraiodothyronine

Question 53

53.What enzyme is produced in the glial cells in the CNS and thyrotropes of the pituitary which acts as a “thyroid axis sensor”? A. Type 2 deiodinase B. Type 4 deiodinase C. Type 3 deiodinase D. Type 1 deiodinase

Answer 53

Type 2 deiodinase

Question 54

54.What enzyme is produced in the thyroid and is responsible for conversion of T4 to T3 in the liver, kidneys and skeletal muscle? A. Type 3 deiodinase B. Type 1 deiodinase C. Type 4 deiodinase D. Type 2 deiodinase

Answer 54

Type 1 deiodinase

Question 55

55.This enzyme converts T4 to reverseT3 which is increased during hyperthyroidism. A. Type 1 deiodinase B. Type 2 deiodinase C. Type 4 deiodinase D. Type 3 deiodinase

Answer 55

Type 3 deiodinase

Question 56

56.What process is the ability to trap and incorporate iodine into thyroglobulin? A. Incorporation B. Acidification C. Iodination D. Organification

Answer 56

Organification

Question 57

57.A patient with a thyroid condition is under your care underwent RAIU. To can confirm hyperthyroidism, what should be his RAIU result? A. more than 50% after 24 hours B. more than 15% after 24 hours C. More than 60% after 24 hours D. more than 25% after 24 hours

Answer 57

More than 60% after 24 hours

Question 58

58.Your patient suffering from Grave’s disease .What will have RAIU result? A. 6 hours and 24 hours will be both low B. 6 hours is low and 24 hours is high C. 6 hours and 24 hours will be both high D. 6 hours is high and 24 hours is low

Answer 58

6 hours is high and 24 hours is low

Question 59

59.A patient came in with tremors, palpitations, bulging eyes and is sweaty. If you are considering Hyperthyroidism, what would be the result of his thyroid work-up? A. Low TSH, high T3 and T4 B. Normal TSH, high T3 and low T4 C. Normal TSH, low T3 and high T4 D. High TSH , low T3 and T4

Answer 59

Low TSH, high T3 and T4

Question 60

60.A patient came in with facial and pedal edema, coarse skin, brittle nails and noted to be constipated. You suspect a primary hypothyroidism. What will you expect her thyroid work-up to be ? A. High TSH, low T3 and high T4 B. Low TSH, high T3 and low T4 C. High TSH, both T3 and T4 are low D. Normal TSH , both T3 and T4 are low

Answer 60

High TSH, both T3 and T4 are low

Question 61

61.What is the minimum daily Iodine requirement of pregnant women? A. 120 ug B. 90 ug C. 200 ug D. 150 ug

Answer 61

200 ug

Question 62

62.What is the average daily Iodine intake of a person? A. 150ug B. 400 ug C. 200 ug D. 100 ug

Answer 62

400 ug

Question 63

63.What is the most common cause of hypothyroidism in Iodine-sufficient areas? A. Congenital hypothyroidism B. Hashimoto's thyroiditis C. Iodine excess D. Ectopic thyroid

Answer 63

Hashimoto's thyroiditis

Question 64

64.What protein binds most of the Thyroid hormones? A. Thyroxine-binding Globulin B. Lipoprotein C. Albumin D. Transthyretin

Answer 64

Thyroxine-binding Globulin

Question 65

65.What is the effect of T3 to the cardiac output to ensure sufficient delivery of O2 to the tissues? A. Has limiting effect B. No effect C. Decreases D. Increases

Answer 65

Increases

Question 66

66.What is the effect of thyroid hormone to the heart rate and stroke volume? A. Decreases B. Increases C. No effect D. Has limiting effect

Answer 66

Increases

Question 67

67.What is the effect of thyroid hormone on the lactate-glucose and fatty acid-triglycerides recycling? A. Increases B. Decreases C. Has limiting effect D. No effect

Answer 67

Increases

Question 68

68.What will be the manifestation of a patient with Hypothyroidism? A. heat intolerance B. Irritable C. Sweaty D. cold intolerance

Answer 68

cold intolerance

Question 69

69.What is the effect of T3 in the heart beta-adrenergic receptor numbers that will enhance symthetic nervous system activity? A. Has limiting effect B. Increases C. Decreases D. No effect

Answer 69

Increases

Question 70

70.What iis the most common cause of hypothyroidism worldwide? A. Ectopic thyroid B. Hypopituitarism C. Congenital anomaly D. Iodine deficiency

Answer 70

Iodine deficiency

Question 71

71.What hormone opposes the action of PTH thereby reducing serum calcium? A. Cholecalciferol B. Calcitriol C. 1,2-hydroxyvitamin D D. Calcitonin

Answer 71

Calcitonin

Question 72

72.Which IS NOT considered as a process of removing calcium and Pi from the blood? A. Renal excretion B. Osteoblastic action C. Osteoclastic action D. Bone formation

Answer 72

Osteoclastic action

Question 73

73.What hormone decreases serum calcium? A. Calcitonin B. Calcitriol C. Cholecalciferol D. 1,2-hydroxyvitamin D

Answer 73

Calcitonin

Question 74

74.Aside the bone, what other organ does PTH targets? A. Intestine B. Kidney C. Parathyroid D. Skeletal muscle

Answer 74

Kidney

Question 75

75.Which cells produce Calcitonin ? A. Parafolicular cells of parathyroids B. Osteoclast C. C-cells of Thyroid D. Osteoblast

Answer 75

C-cells of Thyroid

Question 76

76.Which of the following statements regarding calcium is a fact? A. hypocalcemia results to tetany B.hypocalcemia results to decreased neuromuscular activity C. hypercalcemia results to tetany D. hypercalcemia increases excitability of nerves

Answer 76

A. hypocalcemia results to tetany

Question 77

77.An average adult ingests 1500mg of calcium daily and 200 mg will be absorbed which will be used in bone formation and metabolic processes. How much calcium will be excreted daily in the kidney ? A. 1500 mg B. 200 mg C. 1000 mg D. 500 mg

Answer 77

200 mg

Question 78

78.What regulates the level of PTH? A. Intracellular Ca++ level B. Ca++ in ECF level C. Amount of dietary Ca++ D. Ca++ resorption in the kidneys

Answer 78

Ca++ in ECF level

Question 79

79.What condition can decrease calcium resorption in the distal tubule? A. Hypocalcemia B. Metabolic alkalosis C. Phosphate loading D. Metabolic acidosis

Answer 79

Metabolic acidosis

Question 80

80.Which is the following is NOT a process mediated by calcitonin in relation to Pi ? A. inhibit renal excretion B. Facilitates bone formation C. Increases renal excretion D. Decreases plasma Pi

Answer 80

inhibit renal excretion

Question 81

81.Aside from bone formation, what is the other primary route of removal of Ca and Pi from the blood? A. Liver conjugation B. Intestinal excretion C. Osteoclastic activity D. Renal excretion

Answer 81

Renal excretion

Question 82

82.Where does the FIRST hydroxylization of 7-dehydrocholesterol occur? A. Parathyroid glands B. Duodenum C. Kidney D. Liver

Answer 82

Liver

Question 83

83.The Renal Hydroxylation represent what sequence of hydroxylation of 7-hydroxycholesterol? A. Fourth B. Third C. Second D. First

Answer 83

Second

Question 84

84.What is the plant based Vitamin D? A. Cholecalciferol B. Vit D2 C. Vit D3 D. 1,2 hydroxyvitamin D

Answer 84

Vit D2

Question 85

85.Which of the following choices is true regarging calcitonin? A. Increases serum calcium and Pi B. Primarily act on the bones and kidneys C. Induces bone resorption D. Produced in the parathyroid gland

Answer 85

Primarily act on the bones and kidneys

Question 86

86.For optimal sperm development, the testes lies outside the body and its temperature is lower by (in degree centigrade) A. 4 B. 3 C. 1 D. 2

Answer 86

2

Question 87

87.What is the main function of the interstitial cells of Leydig? A. Assist the spermatogonium to go to the lumen B. Serve as structural support to spermatocytes C. Provide nutrition to spermatogonia D. Produce testosterone

Answer 87

Produce testosterone

Question 88

88.Aside from the tail of epididymis, where else can viable sperms can be stored for months? A. Rete testis B. Body of epididymis C. Vas deferens D. Seminal vesicles

Answer 88

Vas deferens

Question 89

89.Which of the following cells expresses both androgen receptors and FSH receptors? A. Basal Cells B. Sperm cells C. Leydig cells D. Sertoli Cells

Answer 89

Sertoli Cells

Question 90

90.The effect of testosterone on the liver A. Decrease IDL B. Decrease VLDL C. Decrease LDL D. Decrease HDL

Answer 90

Decrease HDL

Question 91

91.What effect do you expect when a body builder injects testosterone for muscle building? A. Increased levels of LH B. Increased Leydig cell activity C. Increased Intratesticular androgen production D. Increased negative feedback on release of LH

Answer 91

Increased negative feedback on release of LH

Question 92

92.What enzyme deficiency does a tall osteoporotic male have? A. 17-hydroxylase B. 5-alpha reductase C. Dihydrotestosterone D. Aromatase enzyme

Answer 92

D. Aromatase enzyme

Question 93

93.What is the effect of Dihydrotestosterone ? A. Deposition of Visceral fat B. Increase Sebum formation C. Increase in VLDL in the liver D. Lowering of tone in male voice

Answer 93

B. Increase Sebum formation

Question 94

94.What is the site of production of FSH? Ovaries Posterior pituitary Hypothalamus Anterior pituitary

Answer 94

Anterior pituitary

Question 95

95.What cell represents the ovarian reserve? Mature preantral follicle Primary follicle Primordial follicle Mural granulosa cells

Answer 95

Primordial follicle

Question 96

96.Which cell produces LDH,HDL and LH receptors? Preantral follicle Theca cells Mural granulosa cells Cumulus cells

Answer 96

Theca cells

Question 97

97.Which hormone is PREDOMINANTLY produced by Corpus luteum ? LH Estrogen Progesterone FSH

Answer 97

Progesterone

Question 98

98.Which IS NOT true regarding Corpus luteum? -After ovulation, remnant of the antral cavity -Programmed to live for only around 28 days unless hCG sustains it -Regression changes it to corpus albicans -Regression is due to rise in prostaglandins in response to declining progesterone at the 2nd week of luteal phase -Corpus Luteum live for only around 14 days unless hCG sustains it.

Answer 98

Programmed to live for only around 28 days unless hCG sustains it

Question 99

99.Which hormone aims to produce a secretory endometrium with nutrients to nourish fertilized ovum when it implants ? Estrogen Inhibin Progesterone Estriol

Answer 99

Progesterone

Question 100

100.Which is the most potent estrogen and is of ovarian origin? Estradiol estriol Androstenedione Estrone

Answer 100

Estradiol