What causes a membrane potential to return to the normal negative value after an action potential has occurred?
a) opening of a voltage-gated K+ channel
b) opening of a voltage-gated Na+ channel
c) opening of a ligand-gated Na+ channel
d) opening of a voltage-gated K+ facilitated transporter
e) closing of a voltage-gated K+ channel
Ans: a) opening of a voltage-gated K+ channel
You might also like to view...
The hormone that controls the concentration of urine is:
a. insulin b. glucagon c. antidiuretic hormone d. thyroxine e. epinephrine
A set of local communities that are linked by the dispersal of multiple, potentially interacting species is referred to as a(n)
A) ecotone. B) archipelago. C) metapopulation. D) metacommunity.
What is rubisco?
a. The least abundant protein on earth b. A molecule that is combined to make the six-carbon sugars glucose and fructose in the Calvin cycle c. An intermediate form of glucose produced during photosynthesis d. An enzyme involved in the Calvin cycle e. An accessory chemical that enables plants to build food molecules
When a bacteriophage genome incorporates itself into the chromosome of the host, that phage genome is referred to as a(n) ________
A) lytic phage B) temperate phage C) T4 phage D) episome E) prophage