Sexual Response Cycle

Question 0

Vaginal Photoplethysmograph

Answer 0

emits light, light reflected back

-the more light reflected back the more arousal due to increase in blood flow to vagina

Question 1

Penile Strain Gauge

Answer 1

Measure amount of blood flowing into penis–>proportional to level of arousal

Question 2

The parasympathetic nervous system effect:

Answer 2

• release acetylcholine that causes dilation of arterioles
• penile veins contracted
• NO–>Guanyl Cyclase–>produces cGMP–>decrease Ca2+ in muscles—>vasodilation
• erection

Question 3

The sympathetic nervous system:

Answer 3

• release norepinephrine which contracts penile arterioles inhibiting erection
• responsible of ejaculation

Question 4

Removal of what two structures in a female will decrease libido?

Answer 4

Adrenal glands and ovaries