Which of the following changes takes place as a person ages?
a. The amount of blood pumped by the heart per minute increases.
b. The size of several body organs decreases.
c. The frequency and nature of adverse reactions to drugs decreases.
d. The efficiency with which the liver metabolizes drugs increases.
Identify a difference between parasympathetic nerves and sympathetic nerves.
a. Parasympathetic nerves are more active during periods of intense stress, whereas sympathetic nerves are more active during periods of rest.
b. Parasympathetic nerves originate from the brain and the spinal cord, whereas sympathetic nerves originate from the thoracic and lumbar spinal nerves.
c. Parasympathetic nerves innervate blood vessels, whereas sympathetic nerves innervate skeletal muscles.
d. Parasympathetic nerves release the neurotransmitter adrenaline, whereas sympathetic nerves release the neurotransmitter acetylcholine.
Identify a difference between the cerebral cortex and the basal ganglia.
a. The cerebral cortex is composed of the bodies of neurons, whereas the basal ganglia are composed of the myelinated axons of neurons.
b. The basal ganglia are located within the outermost layer of the cerebrum, whereas the cerebral cortex is located within the innermost layer of the cerebrum.
c. The basal ganglia are composed of gray matter, whereas the cerebral cortex is composed of white matter.
d. The cerebral cortex perceives all sensory sensations and initiates all voluntary muscle movements, whereas the basal ganglia help coordinate and regulate muscular activity.
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