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32 Cards in this Set

  • Front
  • Back
Where is sperm produced?
Seminiferious tubules
T/F The 3 main sperm types are: interstitial (between tubules), germ cells (divide to become sperm), and sustenacular (sertoli) cells (protect the germ cells)
T
T/F Spermatogenesis: A single spermatogonia produces 4 sperm cells.
T
What type of hormones regulate spermatogenesis?
Gonadotropins
T/F: Flow of semen
1. Seminiferous tubules (site of sperm production)...outer part of the tubule...lumen meisosis
2. Epididymis...sperm maturation, head to tail (storage)
3. Vas defern...carries sperm to ejaculatory duct
4. Urethra...prostate and seminal vessicle (release semen) and bubourethral gland is adding secretions of preejaculatory fluid
5. Penis
T
How long is a single tube of the epididymis structure?
18 feet long
T/F Unused sperm is absorbed by the body
T
T/F In the epidiymis, the tail joins with the vas deferns.
T
A scientist extracts sperm from the lumen of the seminiferous tubule and injects into a tube with several eggs. Will it successfully fertilze one of the eggs? Why or why not?
No it won't fertilze the egg b/c the sperm isn't mature yet.
T/F. Triggering puberty, maintain primary sex organs, and maintaing secondary organs are some functions of testosterone.
T
T/F Testosterone stimulates spermatogenesis
T
At what age does the testosterone levels start to decline?
After 50, hormonal changes, mood, hot flashes, illusions of suffocation
What are the 3 parts of the sperm structure?
Head, midpiece, and tail
What does the head house and what are their functions?
Acrosome and nucleus. Acrosome=pocket of enzymes to dissolve egg's covering
T/F Midpiece contains mitochondria
T, loses organelles but still contains mitochondria and nucleus
Why does the midpiece contain mitochondria?
Need a lot of ATP b/c need a lot of energy for the swimming mechanisms
What is the function of the tail of sperm?
Motion in the ocean, not fully functional into its inside the female
What is the function of the penis?
To deliver sperm to the vagina
T/F The 3 cylinders of erectile tissue are: smooth muscle, connective tissue, and blood vessels
T
T/F Erectile tissue contains small pockets of blood vessels (sinuses) in muscle tissue.
T
What happens to the blow flow in the pockets of blood vessels during and after an erection?
During: increased blood flow
After: decreased flood flow, empties out the pockets. Penis will no longer be erect
What is the primary function of the vas deferens?
Functions to carry sperm to the ejaculatory duct
What occurs during orgasm to move the sperm from the epididymis to the vas deferens?
Peristalisis
T/F The vas deferens is part of the spermatic cord that is a cord of connective tissue that leaves the scrotum and also includes blood vessels, nerves, lymph vessels, and cremaster muscle (shrinkage).
T
What are the 3 main components of semen?
1. Seminal vesicle (60%) produces sticky yellow fluid that causes sperm to stick to the walls of the vagina
2. Prostate gland (30%) produces the thin, milky fluid that helps breakdown the sticky yellow stuff so that the sperm can swim!
3. Sperm (10%)
Which gland releases the preejaculatory fluid?
Bulbourethral gland
T/F The bulbourethral gland produces the slippery fluid (precum) and reduces the acidity of the residual urine
T
T/F The excitement phase of an erection is controlled by the parasympathetic system and the organsm emission phase is controlled by the sympathetic systme.
T
What does the nervous system triggers the release of during the excitement (erection) phase? Why?
Nitric oxide, so the blood vessels relax to easily fill with blood
How long can an orgasm last (emission)? What are the 2 glands that secrete fluid?
3-15 seconds, prostate and the seminal vessicles
T/F The urethral sphincter contracts during an orgasm to block the flow of urine.
T
T/F During the resolution phase, blood vessels constrict to reduce the blood flow and the penis becomes detumescent
T