Implantation of the __________ occurs _______ days after fertilization
a. fetus/10
b. blastocyst/7
c. morula/3
d. zygote/7
e. embryo/10
B
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You are studying the role of a newly discovered neurotransmitter. You find that there are receptors for this neurotransmitter on interneurons in the brain and that when it binds, it causes the opening of K+ channels. What can we expect of the postsynaptic cells under influence of this neurostransmitter?
A. There will be no change to the membrane potential in the postsynaptic cell. B. The postsynaptic cell will undergo an IPSP. C. The postsynaptic cell will undergo an EPSP. D. The postsynaptic cell will immediately undergo an action potential.
What activity during oocyte activation prevents penetration by additional sperm?
Although it clearly has an effect upon the quality of life, there is no evidence to show that exercise prolongs ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following ions has the greatest influence on the resting membrane potential?
A. Chloride B. Potassium C. Phosphate D. Calcium E. Sodium