The minimum level of depolarization required to initiate an action potential in an excitable cell is called the ____

potential.



a. electrical
b. refractory
c. membrane
d. resting
e. threshold


ANSWER: e

Biology & Microbiology

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The fertilized ovum that contains genetic material from both parents, for a total of 46 chromosomes. _____

A) Human chorionic gonadotropin

B) Zygote

C) Chorion

D) Morula

E) Folic acid

F) Fertilization

G) Blastocyst

H) Parturition

I) Cleavage

J) Ovulation

K) Placenta

L) Implantation

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The __________ is a circular molecule of DNA that resides in a region of cytoplasm called the __________. Fill in the blank(s) with the appropriate word(s)

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How many times greater than the calculated background rate is the current rate of extinction estimated to be?

A) 100 B) 50 C) 10 D) 2

Biology & Microbiology

Why is the sense of smell associated with memories and emotions?

What will be an ideal response?

Biology & Microbiology