Which is the neurotransmitter that causes the release of calcium ions from reservoirs within the muscle cell and thereby initiates the steps of contraction?

A. Norepinephrine
B. Acetylcholinesterase
C. Serotonin
D. Acetylcholine


Answer: D

Anatomy & Physiology

You might also like to view...

________ are the simplest body structures considered alive

A) Organelles B) Organs C) Cells D) Organ systems E) Molecules

Anatomy & Physiology

Visceral reflexes include the reflexes that empty the bladder and the rectum

Indicate whether the statement is true or false

Anatomy & Physiology

What is the major hormone produced during the luteal phase?

A. Estrogen B. hCG C. Progesterone D. Androgen

Anatomy & Physiology

The preganglionic axons of CN VII extend to the

A. submandibular ganglion. B. pterygopalatine, submandibular, and otic ganglia. C. pterygopalatine and submandibular ganglia. D. pterygopalatine ganglion. E. otic ganglion.

Anatomy & Physiology