The venom of some cobras contains a mixture of substances that have a variety of physiological effects. One substance in the venom works by preventing acetylcholine from binding to muscle receptors. Which of the following describes the effect of the venom on the prey of the cobra?
A) Action potentials are continuously generated, causing tetanus.
B) Muscle contractions are prevented, causing paralysis.
C) Muscle contractions occur, but refractory periods would be longer.
D) Weak muscle contractions occur, but are limited by ATP production by glycolysis.

Question

Quizplus · Accepted Answer

Muscle contractions are prevented, causing paralysis, because acetylcholine is a neurotransmitter responsible for muscle contraction. If it is blocked from binding to muscle receptors, the muscles cannot contract, leading to paralysis.

The Venom of Some Cobras Contains a Mixture of Substances