Chapter 11 (Repro Behavior)

Question 1

When do we see an increase in the amount of steps a female takes?

Answer 1

During estrus when they are seeking out a male

Question 2

What happens in the brain that results in lordosis?

Answer 2

Sensory cues (eyes, ears, small) are sent to the brain

Question 3

A decrease in ___ outflow will achieve full erection

Answer 3

Venous

Question 4

What are the two blood requirements for ALL species to achieve erections?

Answer 4

Increase in blood flow

Increase in blood pressure

Question 5

(T/F) Only an increase in blood flow is needed to achieve an erection in all species

Answer 5

False, blood flow and blood pressure

Question 6

What is the precursor for nitric acid?

Answer 6

Arginine

Question 7

Nitric acid is important in what part of the erection cycle and why?

Answer 7

• Needed for guanylate cyclase (GTP to cGMP)

- Causes erection

Question 8

What two compounds do we need to achieve an erection?

Answer 8

Increase in nitric acid

Decrease in PDE5

Question 9

What are two sensory stimulations of the glans penis?

Answer 9

Temperature

Pressure

Question 10

What hormone stimulates muscle movement to transport sperm into ejaculatory position?
Where is it released from

Answer 10

Oxytocin

Posterior Pituitary

Question 11

What function does oxytocin have for ejaculation?

Answer 11

It transports sperm into an ejaculatory position

Question 12

What is the refractory period?

Answer 12

The length of time it takes for a male to reach another erection and ejaculation

Question 13

Does the refractory period differ for species? Give examples

Answer 13

Yes
Boar = long time (large ejaculate)
Ram = short time (small ejaculate)