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 16 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
Excellent

LegendaryAnswers

  • Member
  • Posts: 341
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

The three stages of cell signalling: receptor activation, signal transduction, and a cellular respon The three stages of cell signalling: receptor activation, signal transduction, and a cellular respon
An activation barrier, representing the transition state An activation barrier, representing the transition state
Mechanism of ERK activation and cell proliferation Mechanism of ERK activation and cell proliferation
Perception Activity Perception Activity
Daily Alertness Activity Daily Alertness Activity
Classical-Conditioning Activity Classical-Conditioning Activity
Video: Mendel's Principles of Dominance, Segregation and Independent Assortment

For a complete list of videos, visit our video library