PHYSIO B PAST EXAM MCQ

Question 1

The term renal auto regulation refers in part to the fact that?

Answer 1

Renal blood flow is relatively constant over a wide range of systemic arterial pressures.

Question 2

If the end diastolic volume is 135 ml, the end systolic volume is 65 ml, and the avg HR is 72 bpm:

Answer 2

The cardiac output is about 5 L/min.

Question 3

Hemodynamics:?

Answer 3

During physical activity both the amount of blood flow and the relative distribution of the flow in the different parts of the body change.

Question 4

Under normal conditions, saliva contains high concentration of which of the following ions?

Answer 4

Potassium

Question 5

In relation to the autonomic control of the heart?

Answer 5

Stimulation of the left stellate ganglion accelerates heart rate.

Question 6

Beside water, which of the following substances have the highest concentration in bile?

Answer 6

Bile salts.

Question 7

A hyperkalemic patient is given an infusion of glucose and insulin. The actions of insulting include?

Answer 7

Enhancing potassium entry into cells.

Question 8

What is the most common type of motility associated with the descending colon?

Answer 8

Mass movements.

Question 9

Which of the following is the stimulus for increases secretion of atrial natriuretic peptide’

Answer 9

Decrease venous blood volume and atrial pressure.

Question 10

According to liver body supply, which of the following statements is correct?

Answer 10

Portal vein delivers 75% of blood supply and hepatic arteries in the remaining 25%.

Question 11

The brain bridge reflex:

Answer 11

Effects opposite to those of the carotid sinus reflex.

Question 12

The liver is responsible for which of the following metabolic functions?

Answer 12

All responded are correct: oxidation of fatty acids, deamination of AAs, conversion of galactose and fructose to glucose.

Question 13

Sodium is actively reabsorbed from the renal tubule in which of the following nephron segment?

Answer 13

Proximal tubule.

Question 14

Absorption of glucose by enterocytes?

Answer 14

Relies on facilitated transport at the apical membrane.

Question 15

Great vessels:

Answer 15

The elasticity of the arteries is the reason for the pulsatile flow in the arteries.

Question 16

Which of the following steps of the hemoglobin degradation process takes place in the liver?

Answer 16

Bilirubin conjugation with glucoronic acid or sulfate

Question 17

During acute hypoglycemia, insulin secretion is inhibited by low glucose and?

Answer 17

GLP-1 signaling through GLP-1 receptors

Question 18

What signal causes the heart to secrete atrial natriuretic acid?

Answer 18

Increased plasmatic sodium levels

Question 19

The amount of water is excreted in stool is about?

Answer 19

100ml

Question 20

Which of the following plasma proteins are not synthesized in the liver?

Answer 20

Gamma Globulin

Question 21

ACTH deficiency would greatly diminish:?

Answer 21

The secretion of cortisol

Question 22

Which percentage of bile salts gets reabsorbed into the blood from the intestine with the enterohepatic circulation?

Answer 22

80%

Question 23

Which of this following elements is a characteristic of an obstructive jaundice?

Answer 23

Plasmatic increase of conjugated Bilirubin

Question 24

Myogenic reflex?

Answer 24

This reflex is important in the auto regulation of blood flow and small arteries and arterioles.

Question 25

Select the false statement. In relation to the properties of the vascular system:?

Answer 25

An increase in the longitudinal pressure gradient along a peripheral vascular stimulates nitric oxide release from the smallest that muscle and causes vasodilation.

Question 26

Vitamin B12 is absorbed mainly in there?

Answer 26

Ileum

Question 27

In physiological conditions, which of the following substances is reabsorbed to the highest proportion at the level of that tubular system?

Answer 27

Glucose

Question 28

In relation to control the circulation?

Answer 28

The function of the myogenic mechanism is to keep constant blood pressure and peripheral circulatory districts during postural changes.

Question 29

The gastric juice has all the following characteristic except?

Answer 29

Antibacterial action is produced by mucous content.

Question 30

EC-Coupling?

Answer 30

In the heart ryr and dhp have link

Question 31

Regulation of blood flow ?

Answer 31

Short term regulation of blood flow occurs via vasodilation and constriction.

Question 32

Most of the water and electrolytes absorbed across the walls of the GI tract is absorbed in this region:?

Answer 32

Large intestine.

Question 33

Renin is releases by the kidney in response to?

Answer 33

Decreased blood pressure

Question 34

Gastric secretion is inhibited by all of the following except:?

Answer 34

Presence of excess protein digestive products in the stomach.

Question 35

Urea has a higher concentration in the fluid that leaves the proximal tube than in the blood plasma bc:?

Answer 35

Urea diffuses back into the proximal tubule bc of high urea concentration in the renal medulla.

Question 36

The fick principle:?

Answer 36

Derives from the law of conservation of energy.

Question 37

Which of the following stimuli regulates bile secretion from the liver?

Answer 37

Cholecystokinin secretion

Question 38

The appearance of large amounts of ammonium ion in the urine is characteristic of the renal response to?

Answer 38

Alkalosis.

Question 39

After ideal resection, a patient will have excess fat in feces for the following reason?

Answer 39

Miscelles do not form in the intestinal lumen.

Question 40

Slow electrical waves are associated with?

Answer 40

The enteric nervous system.

Question 41

Which signal causes the heart to release the peptide niatr..?

Answer 41

Increased blood pressure.

Question 42

Staircase effect?

Answer 42

Entropy increase due to accumulation of Ca in the cell following adrenergic stimuli.

Question 43

According to fricks principle?

Answer 43

You can calculate VO2 if you have delta P and CO

Question 44

In case of CO2 at muscular level:…

Answer 44

Hypermia active

Question 45

Surfactant act…select false?

Answer 45

More on larger alveoli

Question 46

Hemoglobin?

Answer 46

High O2 affinity at high pH, low O2 affinity with 2,3 BPG