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.
50% if the B blood type parent is heterozygous
Explanation:
To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
Answer:
1. Spinal cord 2. somatic
Explanation:
Just took test on plato and got it all correct
Difference: Carbon cycle requires life, and the water cycle just requires sunlight. So former would continue to occur without life, but the latter would not.
Similarity: They both use Plants as an Integral component. <span>The </span>water cycle<span> uses plants for uptake of </span>water and transpiration from the surface whereas carbon<span> is used in photosynthesis and also form the body of the plant (through various organic molecules)
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