× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Q & A Board Biology-Related Homework Help Cell Biology
New Topic  
daniellelady daniellelady
wrote...
Posts: 793
Rep: 0 0
6 years ago
During fertilization in humans, _______________________.
 
  (a) a wave of Ca2+ ions is released in the fertilized egg's cytoplasm.
  (b) only one sperm binds to the unfertilized egg.
  (c) a sperm moves in a random fashion until it encounters an egg.
  (d) several sperm pronuclei compete in the cytoplasm to fuse with the egg nucleus.
Read 38 times
1 Reply

Related Topics

Replies
wrote...
#1
6 years ago
Choice (a) is correct. Many sperm can bind to an egg choice (b). Cells surrounding the egg release a chemoattractant signal, attracting the sperm to the correct place; sperm are moving toward the chemoattractant signal and not moving randomly choice (c). Mechanisms exist to ensure that only one sperm fertilizes each egg, and thus only one sperm pronucleus will reach the cytoplasm of the egg choice (d).
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1087 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 949
  
 266
  
 697
Your Opinion
Do you believe in global warming?
Votes: 370
Previous poll results: Which 'study break' activity do you find most distracting?