This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: What activity during oocyte activation prevents penetration by additional ... (Read 56 times)

gonzo233

  • Hero Member
  • *****
  • Posts: 557
on: Feb 27, 2019
What activity during oocyte activation prevents penetration by additional sperm?

Question 2

A gene's position on a chromosome is called a
 A) karyotype.
  B) map.
  C) recombinant.
  D) genome.
  E) locus.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Yixagurpuldink

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Feb 27, 2019
Answer to Question 1

The first sperm to penetrate the oocyte triggers a sequence of changes that block entry by other sperm, or polyspermia. Polyspermy is prevented by depolarization of the egg membrane by opening of sodium channels and by the cortical reaction triggered by the release of calcium ion from smooth ER within the oocyte. The calcium ion stimulates the vesicles to undergo exocytosis. Their contents cause the zona pellucida to harden, creating a barrier against further sperm penetration.

Answer to Question 2

E


gonzo233

  • Member
  • Posts: 557
Reply 2 on: Feb 27, 2019
Wow, this really help

billybob123

  • Member
  • Posts: 336
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

More than 4.4billion prescriptions were dispensed within the United States in 2016.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

Did you know?

Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.

Enzyme activity is affected substantially by temperature Enzyme activity is affected substantially by temperature
Decreased Activation of the Subgenual ACC After a Variety of Successful Treatments for Depression Decreased Activation of the Subgenual ACC After a Variety of Successful Treatments for Depression
Mechanisms of action of antidepressants: (a) In adrenergic and serotonergic neurons the activity of ... Mechanisms of action of antidepressants: (a) In adrenergic and serotonergic neurons the activity of ...
Brain Hemisphere Activity Brain Hemisphere Activity
Winter Activity grade 1 Winter Activity grade 1
Winter Activity grade 1 Winter Activity grade 1
Video: hGH (protein synthesis, growth and development)

For a complete list of videos, visit our video library