Neurons that have a single axon and a single dendrite are

The muscle shape that has the capacity to shorten to the greatest degree is

When acetylcholine binds with nicotinic receptors, the response is

The blood-brain barrier

Place the following parts of a reflex arc in the correct order beginning with the sensory receptor.(1) motor neuron(2) interneuron(3) effector(4) sensory neuron(5) sensory receptor

Parasympathetic preganglionic axons from the sacral region of the spinal cord course through ________ nerves that innervate the ________.

In order for a molecule to be detected by the olfactory neurons, it must

Atropine causes the pupil of the eye to dilate by blocking the effect of muscarinic receptors. This means atropine is a(n)

Which portion of a reflex arc is most likely to be located entirely within the central nervous system?

The area of greatest visual acuity is the