How would a drug that blocks acetylcholinesterase (Za) activity at the motor end plate aff ect skeletal
muscle contractions?
A. It would make the muscles less excitable.
B. It would prolong the duration of muscle contractions.
C. It would cause flaccid paralysis (relaxed muscles unable to contract).
D. It would have no effect on skeletal muscle contractions.

C

Explanation:

It would cause flaccid paralysis (relaxed muscles unable to contract).

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure