In Skeletal Muscle Contraction, the Neurotransmitter ____ Is Released at the Axon

question 39

Multiple Choice

In skeletal muscle contraction, the neurotransmitter ____ is released at the axon terminal of the neuromuscular junction to trigger an action potential in the muscle cell.

• A) troponin
• B) Ca²⁺
• C) tropomyosin
• D) ATP
• E) acetylcholine

---

Definitions:

Sulfur

A chemical element with the symbol S, known for its importance in biological organisms and its role in various chemical compounds.

Isotopes

Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nuclear mass, yet retain their identity as that element.

Neutrons

Subatomic particles found in the nucleus of an atom, with no electric charge and a mass slightly larger than that of protons.

Protons

Positively charged subatomic particles found within the nucleus of an atom, defining the element's atomic number.