Male reproductive physiology

Question 1

Nature and function of the secretion of the bulbourethral glands

Answer 1

Watery, Before ejactulation to lubricate clean the urethra

Question 2

Nature and function of secretion from the prostate

Answer 2

Alkaline fluid, buffer vaginal acid

Question 3

Nature and function of the secretion from the seminal vesicles

Answer 3

Citrate and fructose (energy), Prostaglandins (Suppress female immunity), Alkaline fluid (buffer vaginal acid)

Question 4

Describe the processes to generate an erection

Answer 4

Tactile or psychological stimulation causes PNS input causing the release of NO from endothelium causing vasodilation

Question 5

Describe the process of emission

Answer 5

Semen moved to urethra by contraction of the vas deferens, controlled by SNS from T11-L2

Question 6

Describe the process of ejaculation

Answer 6

Internal sphincter closes, glands and muscles contract, Under control of SNS via the pudendal nerve (L1-L2)

Question 7

Describe changes in the sperm once it enters the vagina

Answer 7

Coagulates then liquefies due to enzymes from the prostate, Under go capacitation where they lose glycoprotein coat so can fuse with the oocyte