2 Reproduction

Question 1

How is the cell cycle controlled?

Answer 1

• multiple checkpoints
• main protein is p53 in control of restriction point and G2/M checkpoint
• cyclins and cyclin-dependant kinases (CDK)

Question 2

What are the main organs of the male reproductive system?

Answer 2

SEVE(N) UP

• seminiferous tubules
• epididymis
• vas deferens
• ejactulatory duct
• nothing
• urethra
• penis

Question 3

What is the process of spermatogenesis?

Answer 3

• 1 cell to 4 functional sperm
• occurs in seminiferous tubules

spermogenia –> primary spermatocytes (after genetic replication) –> secondary spermatocytes (after first meiotic division) –> spermatids (after meiosis II) –> spermatozoa (after maturation of sperm)

Question 4

What is the function of the structures of sperm?

Answer 4

1. Head - contains genetic information
2. Mid piece - generates ATP from fructose (has lots of mitochondria)
3. Tail - move around