Exam 10: Nervous System I: Basic Structure and Function

Every neuron has

The space between neurons is called the neuronal space.

Viagra is a drug used to treat erectile dysfunction by dilating arteries in the penis. The neurotransmitter that Viagra affects is

Several nerve fibers converging onto one neuron amplifies impulses.

Most of the neurons in the brain and spinal cord are

Synaptic knobs are at the ends of

Convergence refers to

A nerve is a single neuron that transmits impulses.

The neurotransmitter that controls skeletal muscle contraction is

Saltatory conduction

Drugs that inhibit the enzyme monoamine oxidase

Which of the following molecules is responsible for "runner's high," a good feeling that accompanies long-distance running?

The oculomotor nerve is a cranial nerve containing nerve fibers that innervate eye muscles and control eye movement. These fibers are examples of

Neuropeptides that affect a neuron's response to other neurotransmitters are called ________.

Myelin is composed largely of carbohydrates.

A neuron is exposed to a drug that completely blocks voltage-gated potassium channels, but has no effect on non-gated channels or the sodium-potassium pump. Which of the following describes the effect on action potential generation?

Myelin is rich in ________.

Drugs that decrease membrane permeability to sodium

Drugs that increase the actions of norepinephrine and/or serotonin by keeping them in synapses longer are most likely used to treat

A neuron branching from the spinal cord innervates a group of muscle fibers in the biceps brachii and stimulates them to contract. This neuron is part of the ________ pathway.