The dispersed state of matter is a solid and the dispersion medium is a liquid.
The frequency of alleles in a population that is in hardy-Weinberg equilibrium
A) changes in each successive generation
<u>B) is less important than the frequency of genotypes </u>
C) shows evidence of the process of natural selection
D) remains the same over several generations
Agents that paralyze skeletal muscle by simple competitive inhibition of acetylcholine at muscle receptor sites are called?
a. nondepolarizing
b. depolarizing
c. antagonizing
d. repolarizing
Answer:
a. nondepolarizing
Explanation:
As the nerve impulse arrives, the synaptic end bulbs of the motor neurons release acetylcholine in the synapse. Acetylcholine binds to its receptors present at the motor endplate. This results in the opening of an ion channel in the ACh receptor to allow the movement of the Na+ into the cell. This makes the inside of the muscle fiber more positively charged, that is, depolarized.
Depolarization triggers a muscle action potential. Drugs or chemicals that paralyze skeletal muscle by competitive inhibition of acetylcholine at muscle receptor sites are called non-depolarizing as they do not allow the acetylcholine to facilitate the depolarization of the muscle fiber.
Answer:
A) Chloroplasts transform light energy into chemical energy.
Explanation:
Chloroplasts are plastids, cellular organelles inherent in plant cells, which contain a green pigment, chlorophyll, by which they perform photosynthesis.
Photosynthesis is a process in which, with the help of chlorophyll, solar energy is converted into chemical energy in order to use that chemical energy (ATP) for the synthesis of organic matter from inorganic matter (CO2 and H2O).
