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Flashcards in Unit 8 Deck (48)
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1

Can hormones act anywhere in the body

No, they can only produce effects on specific target cells

2

Explain a negative feedback system

Once the levels of a specific hormone drop below the needed levels, the appropriate endocrine gland is stimulated to produce more hormones. When proper hormone levels are reached in the bloodstream, then the production of that hormone is reduced.

3

Hypothalamus is part of what

Diencephalon

4

What connects anterior pituitary to hypothalamus

Small blood vessels called a portal system

5

What connects posterior pituitary to hypothalamus

Specialized nerves

6

Hormones that the posterior pituitary produces

NONE, only stores

7

Hormones that the anterior pituitary produces

GH, prolactin, TSH, ACTH, FSH, LH, melanocyte-stimulating hormone

8

What hormones does the posterior pituitary store and what produces those hormones

Anitdiuretic & oxytocin, from hypothalamus

9

How does the hypothalamus control which hormones the anterior pituitary gland releases

By using releasing & inhibiting factors

10

Function of growth hormone

Young animals: Promotes growth of body, especially bone & muscle. All ages: Regulates metabolism of proteins, carbs, & lipids in all body cells.

11

Function of prolactin

Stimulates lactation in the mammary glands. Prolactin production/release continues as long as the teat is still being stimulated

12

Function of thyroid stimulating hormone

Causes thyroid gland to produce its hormones, regulated by feedback from the thyroid gland

13

Function of adrenocorticotropic hormone

Stimulates growth/development of the adrenal gland cortex, also stimulates release of some adrenal cortex hormones

14

Function of follicle-stimulating hormone (females)

Acts in ovaries to stimulate growth & development of follicles as well as stimulating the cells lining the follicles to produce/secrete estrogens

15

Function of FSH in males

Acts in testes to develop spermatogenesis

16

Function of luteinizing hormone (females)

Completes process of follicle development in the ovary

17

What happens when LH peaks

Ovulation occurs, the follicle was mature

18

Following ovulation, LH stimulates the remaining cells in the empty follicle to what

Form the corpus luteum, which produces progestin hormone that is needed to maintain the pregnancy

19

Function of LH in males

Stimulates interstitial cells in testes to develop/produce testosterone

20

Another name for FSH and LH

Gonadotropins

21

Function of melanocyte-stimulating hormone

Effects in domestic animals unknown, involved in camouflage of other species

22

What is diuresis

Producing & passing large amounts of urine

23

Function of ADH

Acts in kidneys to help prevent diuresis, ADH released when dehydration is detected in the body. Kidneys reabsorb more water from urine

24

Function of oxytocin (not involving mammary gland)

Acts in smooth muscle of uterus to cause contraction of uterine smooth muscle at time of breeding & birthing

25

Function of oxytocin in the mamary glands

Stimulate milk let down, released into bloodstream by the teat being stimulated

26

Hormones of the thyroid gland

Thyroid hormone & calcitionin

27

Hormones of the adrenal cortex

Glucocorticoids, mineralcorticoids, & sex hormones

28

Hormones of adrenal medulla

Epinephrine & norepinephrine

29

Hormones of the pancreas

Insulin, glucagon, & somatostatin

30

Function of thyroid hormone

Acts in body cells in many areas in the body & has numerous functions; hyperglycemic effect, stimulates cardiac output & increases heart rate, promotes bone & muscle growth, maintains body temp & metabolism, stimulates gut motility, promotes hair growth & healthy skin