The voltage-gated Na+ channels _____ when the cell membrane reaches threshold level as a result of a stimulus

Fill in the blank(s) with the appropriate word(s).


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Anatomy & Physiology

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Smooth muscle tissue is found in the organs of the digestive tract, the walls of blood vessels, and the iris.

Answer the following statement true (T) or false (F)

Anatomy & Physiology

If the chemically gated sodium channels in the postsynaptic membrane were completely blocked,

A) synaptic transmission would fail. B) release of neurotransmitter would stop. C) smaller action potentials would result. D) the presynaptic membrane would be unable to reach threshold. E) the presynaptic neuron would release a different neurotransmitter.

Anatomy & Physiology

Which layer is the dura mater?

a) E b) F c) G d) H e) I

Anatomy & Physiology

In general, the parasympathetic division will

A. Decrease digestive functions B. Increase digestive functions C. Increase cardiac rate D. Increase breathing rate

Anatomy & Physiology