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module 10

Terms in this set (16)

nervous system
the body's speedy, electrochemical communication network, consisting of all the nerve cells of the peripheral and central nervous systems
autonomic nervous system
the part of the peripheral nervous system that controls the glands and the muscles of the internal organs (such as the heart). Its sympathetic division arouses; its parasympathetic division calms.
central nervous system
consists of the brain and spinal cord
sympathetic nervous system
the division of the autonomic nervous system that arouses the body, mobilizing its energy in stressful situations
peripheral nervous system
the sensory and motor neurons that connect the central nervous system to the rest of the body
parasympathetic nervous system
the division of the autonomic nervous system that calms the body, conserving its energy
Nerves
bundled axons that form neural "cables" connecting the central nervous system with muscles, glands, and sense organs
reflex
a simple, automatic response to a sensory stimulus, such as the knee-jerk response
Sensroy (afferent) neurons
in the bodys tissues and sense receptors
endocrine system
the body's "slow" chemical communication system; a set of glands that secrete hormones into the bloodstream
motor (efferent) neurons
neurons that carry outgoing information from the brain and spinal cord to the muscles and glands
Horomones
chemical substances that carry messages through the body in blood
Interneurons
neurons within the brain and spinal cord that communicate internally and intervene between the sensory inputs and motor outputs
adrenal glands
a pair of endocrine glands that sit just above the kidneys and secrete hormones (epinephrine and norepinephrine) that help arouse the body in times of stress.
somatic nervous system
the division of the peripheral nervous system that controls the body's skeletal muscles
pituitary gland
The endocrine system's most influential gland. Under the influence of the hypothalamus, the pituitary regulates growth and controls other endocrine glands.
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