Regulation of reproduction 1 (Chapter 5)

Question 1

Hormones

• short
• binds
• regulates

Answer 1

Short half-life
Binds to specific receptors
Regulates intracelluar reactions

Question 2

Five modes of action

Answer 2

1. Neuroendocrine
2. Endocrine
3. Paracrine
4. Autocrine
5. Lactocrine

Question 3

Mode when cells produce hormones that act on their neighbors

Answer 3

Paracrine

Question 4

What is the primary delivery system of hormones?

Answer 4

Blood

Question 5

What is the endocrine mode?

Answer 5

When every cell that is not a neuron produces a hormone that acts on a distant cell

Question 6

Mode when a cell produces a hormone that acts on itself

Answer 6

Autocrine

Question 7

What is lactocrine mode?

Answer 7

When the mother produces a hormone that goes into the milk and is absorbed by the neonate

Question 8

What is the site of GNRH production?

Answer 8

Hypothalamus

Question 9

GNRH goes to the (posterior/anterior) lobe

Answer 9

Anterior lobe (AL)

Question 10

What are the final products after GNRH enters the portal system?

Answer 10

FSH and LH

Question 11

What is the purpose of the portal system?

Answer 11

To provide quicker uptake of hormones

Question 12

What is GNRH excretion pattern?

Answer 12

Pulse pattern

Question 13

Where is oxytocin produced and where is it stored?

Answer 13

Produced in the hypothalamus

Stored in the posterior lobe (PL)

Question 14

What type of hormone is GNRH?

Answer 14

Peptide hormone

Question 15

What are two examples of protein hormones?

Answer 15

FSH and LH

Question 16

For protein hormones which subunit makes them unique?

Answer 16

Beta subunit

Question 17

How many peptide amino acids does GNRH contain?

Answer 17

Ten

Question 18

What are all steroid hormones created from?

Answer 18

Cholesterol

Question 19

(T/F) Males produce progesterone

Answer 19

True, but only for a split second before it becomes testosterone

Question 20

What is the order of steroid hormone production?

Answer 20

1. Cholesterol
2. Progesterone
3. Testosterone
4. Estradiol

Question 21

What is the enzyme aromatase responsible for?

Answer 21

Turning testosterone into estradiol

Question 22

Four classifications of hormones

Answer 22

1. Peptide
2. Protein
3. Steroid
4. Prostaglandins

Question 23

What are all prostaglandins derived from?

Answer 23

Arachidonate

Question 24

Prostaglandin functions
F2:
E2:

Answer 24

Kills the corpus luteum

Stimulates progesterone production by the corpus luteum