What Begins or Triggers Muscle Contraction

question 20

Multiple Choice

What begins or triggers muscle contraction?

• A)high levels of oxygen and sugar.
• B)release of acetylcholine at a synapse that directly causes actin and myosin to slide.
• C)release of surplus ATP by a nerve motor unit.
• D)a nerve releases acetylcholine,which triggers flow of calcium,which unblocks troponin.
• E)a nerve releases troponin which triggers flow of calcium which unblocks acetylcholine.

---

Definitions:

Spontaneous Recovery

The reappearance of a previously extinguished conditioned response after a period of rest, without any further conditioning.

Skinner Box

An experimental apparatus developed by B.F. Skinner for studying operant conditioning in animals, involving levers, stimuli, and rewards.

Operant-Conditioning Chamber

A controlled environment used in behavioral psychology to study animal behavior through rewards and punishments.

Puzzle Box

A problem-solving task used in experiments, often with animals, to study learning and behavior.