Chapter 10 True/False
A mixed nerve includes different neuroglial cells.
FALSE
A nerve is a single neuron that transmits nerve impulses.
FALSE
Converging nerve fibers amplify nerve impulses.
FALSE
During the absolute refractory period, a stimulus of high intensity may trigger a nerve impulse.
FALSE
Interneurons are specialized to carry impulses from receptor cells into the brain or spinal cord.
FALSE
Myelin is composed largely of carbohydrates.
FALSE
Neuroglia are specialized to react to environmental change, and neurons support neuroglia.
FALSE
Nodes of Ranvier lie between neurons.
FALSE
Schwann cells produce layers of membrane containing myelin, which provides nutrition for the dentrites.
FALSE
Sensory nerve cells act as the decision-making cells to sum up all signals for certain stimuli.
FALSE
Sensory receptors are part of the CNS.
FALSE
Several nerve fibers converging onto one nerve fiber amplifies nerve impulses.
FALSE
The space between neurons is called the neuronal space.
FALSE
Astrocytes structurally support neurons and also provide important signals and nutrients to neurons.
TRUE
Axon branches are called collaterals.
TRUE
Because the response of a nerve fiber is all-or-none, a greater intensity of stimulus does not produce a stronger impulse.
TRUE
Enkephalins are neuropeptides.
TRUE
In convergence, two or more incoming fibers contact a single neuron, whereas in divergence, impulses leaving a neuron pass into several output fibers.
TRUE
The brain and spinal cord comprise the central nervous system.
TRUE
The peripheral nervous system PNS lies outside the central nervous system CNS.
TRUE
The somatic nervous system controls voluntary actions and the autonomic nervous system oversees involuntary actions.
TRUE