Gamete Transport - Sperm Flashcards
0
Q
How many sperm ejaculated?
A
~300-400 million sperm in ejaculate
1
Q
What is the posterior vaginal fornix?
A
the cervix
2
Q
How do they move through the endocervical canal?
A
Sperm flagella provide motility for moving through endocervical canal
3
Q
Where is vesiculase produced?
- what does it do?
A
Vesiculase is an enzyme produced in seminal vesicles
- coagulates some semen to form a plug in endocervical canal - reduces backflow through cervix
4
Q
How is sperm transport facilitated in uterus?
A
Peristaltic contractions convey sperm through uterus and into oviducts
- prostaglandins in semen promote these muscular contractions
5
Q
How many sperm reach fertilization site?
A
~200 sperm reach fertilization site
6
Q
How long does it take for the fastest sperm to move from vagina to ampulla of oviduct?
A
5-45min
7
Q
How long does it take for sperm to reach fertilization site?
A
occurs in 1-7hrs
