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29 Cards in this Set
- Front
- Back
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What does the central nervous system include? |
the brain and spinal chord |
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What is the most complex organ in the body and the control center for the nervous system? |
the brain |
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What is the largest part of the brain? |
the cerebrum |
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What is just below the cerebrum? |
the cerebellum |
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What is the lowest part of the brain? |
the brain stem |
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What is the spinal cord? |
The spinal cord is a thin, tubular bundle of nervous tissue that extends from the brainstem and continues down the center of the back to the pelvis |
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Describe the peripheral nervous system. |
consists of all the nervous tissue that lies outside the central nervous system |
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What does the sensory division of the peripheral nervous system do? |
carries sensory info from the body to the CNS |
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What does the motor division do? |
carries nerve impulses from the central nervous system to muscles and glands throughout the body |
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What does the somatic nervous system control? |
mainly voluntary activities that are under conscious control |
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Autonomic nervous system- |
all other involuntary activities that aren't under conscious control are the responsibility of the autonomic nervous system |
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Sight |
the ability to sense light |
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Where does light first pass through? |
the cornea |
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What is the cornea? |
a clear outer layer that protects the eye |
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Where does light enter the eye? |
through an opening called the pupil |
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What is hearing? |
the ability to sense sound waves |
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What are taste and smell? |
abilities to sense chemicals |
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What is the endocrine system? |
a system of glands that release chemical messenger molecules called hormones |
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What is the thyroid gland? |
a large gland in the neck that increases the rate of metabolism in cells throughout the body |
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Where are the 2 parathyroid glands located? |
behind the thyroid gland- helps to keep the level of calcium in the blood within a narrow range |
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What is the pineal gland? |
a tiny gland located at the base of the brain- secretes the hormone melatonin which controls sleep-wake cycles and other processes |
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Where is the pancreas located and what does it do? |
near the stomach- its hormones include insulin and glucagon- the 2 work together to control the level of glucose in the blood |
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Where are the 2 adrenal glands located? |
above the kidneys- secretes cortisol, which helps deal with stress, and aldosterone, which helps regulate the balance of minerals in the body |
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Male gonads-` |
testes |
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female gonads- |
ovaries |
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What is negative feedback? |
it occurs when a product feeds back to decrease its own production |
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What is positive feedback? |
occurs when a product feeds back to increase its own production |
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What is hyper secretion? |
too much hormone secretion |
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hypo secretion- |
too little hormone secretion |
