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3A Nervous System
Terms in this set (13)
"morphine within"--natural, opiatelike neurotransmitters linked to pain control and to pleasure.
the body's speedy, electrochemical communication system, consisting of all the nerve cells of the peripheral and central nervous systems
central nervous system (CNS)
the body system composed of the brain and the spinal cord
peripheral nervous system (PNS)
the sensory and motor neurons that connect the central nervous system to the rest of the body.
somatic nervous system
the division of the peripheral nervous system that controls the body's skeletal muscles. Also called the skeletal nervous system
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.
sympathetic nervous system
the division of the autonomic nervous system that arouses the body, mobilizing its energy in stressful situations
parasympathetic nervous system
the division of the autonomic nervous system that calms the body, conserving its energy
a simple, automatic, inborn response to a sensory stimulus, such as the knee-jerk response
the body's "slow" chemical communication system; a set of glands that secrete hormones into the bloodstream
Chemical messengers, mostly those manufactured by the endocrine glands, that are produced in one tissue and affect another.
a pair of endocrine glands just above the kidneys. the adrenals secrete the hormones epinephrine (adrenaline) and norepinephrine (noradrenaline), which help to arouse the body in times of stress.
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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