Topic 17: Reproductive System - Spermatogenesis + Semen Flashcards
1
Q
What is spermatogenesis?
A
sperm production within seminiferous tubules
2
Q
Diagram of spermatogenesis
A
3
Q
What is spermiogenesis?
A
- differentiation of spermatids
4
Q
What occurs in spermiogenesis? (2)
A
- develop flagella and acrosomes
- lose most cytoplasm
5
Q
What are the 3 components of a spermatozoa?
A
- head
- body (midpiece)
- tail = flagellum
6
Q
What is the structure of the head of a spermatozoa? (2)
A
- nucleus (23 xmes = n)
- top of nucleus is the acrosome
7
Q
What does the acrosome contain?
A
- digestive enzymes to penetrate oocyte
8
Q
What does the body of the spermatozoa contain? (2)
A
- large number of mitochondria
- produces ATP for movement
9
Q
What does the flagellum (tail) of spermatozoa made of?
A
- microtubules
10
Q
What is the function the the tail of spermatozoa?
A
propel sperm
11
Q
What is semen?
A
- sperm, testicular fluid, and accessory gland secretions
12
Q
How much sperm is released in ejaculation? How much sperm is in that?
A
- 2-5mL
- contains 20-150 million sperm/mL
13
Q
What is the pH of semen?
A
7.2-7.6
14
Q
What does semen provide sperm? (3)
A
- transportation medium
- nutrients
- protection
