Lecture #47 - Coitus

Question 1

What are the 4 genital reflexes of the male sexual act?

Answer 1

-

Question 2

What is the name of the artery that supplies the perineum?

Answer 2

-

Question 3

Blood supply to the penis does what during erection?

Answer 3

-

Question 4

1. Genital sexual reflexes involve coordination of what three NS division?

Answer 4

-

Question 5

Neuronal stimulation of the male (and female) genital sexual reflexes:

1. What is the main control centre?
2. Efferent signals - what is the stimuli and through what nerve?
   - what does parasympathetic send?
   - what does sympathetic send? (b_____)
3. Afferent signals - what stimuli and what nerve?
   - what do they activate?

Answer 5

-The key thing about the nerve supply is that there are afferent (tactile/touch sensory stimuli) nerves returning to the cerebral cortex - and there are also efferent autonomic signals sent to the penis or clitoris in response to the tactile (afferent) or psychological stimuli. All of these travel through pelvic nerves - specifically the pudendal nerve in both males and females.

The image on slide 10 shows this arrangement - however from the male perspective - but if you replace the penis/scrotum etc with female genitalia the context is the same.

Question 6

Ejaculation

1. What is this a process of?
2. What are the two phases and under what NS division are they?
3. Under what NS division is erection?
4. What is emission and just note that the feedback to the brain is sent via somatic nerves that causes involuntary contractions to the SM around the accessory glands and that squeezes fluid out. What accessory glands squeeze out and where does the fluid move and how?
5. What is expulsion and ejection of what?
6. What happens to the pelvic floor muscles?

Answer 6

-

Question 7

Erectile dysfunction:

1. What is it?
2. 4 possible causes - what are they?

Answer 7

-

Question 8

Neuronal stimulation of female genital sexual reflexes:

1. Engorgement of what 3 things in response to _____ stimulation
2. Entry of _____ ____ through vaginal wall; secretion of ____ into vestibule
3. Increase ____ ___ to vag (high in fe than male)
4. Increases ____, and _____ of vagina in response to _____ stimulation. What happens to uterus?
5. Rhythmic contractions of what three things in response to what?

Answer 8

-

Question 9

Methods of contraception:

1. What are 4 natural methods and how do they work?
2. What are the 3 forms of artificial control methods?

Answer 9

-

Question 10

Artificial contraceptive methods:

1. What are three surgical contraception methods? (3)
2. How do they work? (2)
3. What is a disadvantage of full and what is a disadvantage of partial hysterectomy?
4. What are the two disadvantages of caps/diaphragms?
5. What are the 4 advantages of condoms?
6. IUDs
   - produce a ___ ___, local _____ which does 5 things?
   - what do recent IUDs contain and what does it do?
7. Steroidal contraceptives females:
   - contain what and maybe what?
   - what are some things that contain progestins at low doses and what 4 things do they do?
   - what is an example of something that releases high dose of progestin and what does it do?
   - Overall, can you get menstruation with this?
8. Steroidal contraceptives males:
   - _____ axis supression unacceptable unless _____ replaced - why?
   - _____ plus androgen treatment reduce sperm concentration to what?
   - what may thus promote? (BPH)

Answer 10

BHP = An enlarged prostate means the gland has grown bigger. Prostate enlargement happens to almost all men as they get older. As the gland grows, it can press on the urethra and cause urination and bladder problems. An enlarged prostate is often called benign prostatic hyperplasia (BPH).