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21 Cards in this Set
- Front
- Back
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Within the nervous system, information is conveyed by electrochemical signals transmitted rapidly by nerve cells or ____________.
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neurons
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The endocrine system communicates by using chemicals called _____________.
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hormones
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_______________ control mechanisms which regulate hormonal secretions.
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Negative feedback
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Each neuron has a ____________ which contains the nucleus, and two or more processes radiating from the call body.
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cell body
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Information is conveyed away from the cell body by the ________.
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axon
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Neuron to neuron signals are transmitted from the first neuron across a space (___________) to the second neuron by a chemical messenger (_____________) that is secreted at the axonal ending.
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synaptic cleft; neurotransmitter
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Name the four regions the brain is divided into.
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cerebral hemispheres, diencephalon, brain stem, and cerebellum.
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The brain has elevated mounds of tissue called __________-.
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gyri
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The deep groove that almost completely separated the cerebral hemisphere is called the _____________.
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fissure
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Namhe three parts of the diencephalon.
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thalamus, hypothamulus, and epithalamus
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The ___________ is attahed to the hypothamulus.
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pituary gland
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Name the three parts of the epithamulus.
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third ventricle, choroid plexus, and pineal body
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The third ventricle is a cavity within the brain that is filled with ___________ which protects brain from various traumas.
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cerebrospinal fluid
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The _____________ are capillary beds that form the cerebrospinal fluid.
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choroid plexus
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The ____________ is an endocrine gland located in the root of the third ventricle.
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pineal body
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The brain stem is formed of the ___________, _________, and _________.
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midbrain, pons, and medulla oblongata
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Name the four lobes of the brain.
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frontal, parietal, temporal, and occipital lobes.
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Name the only pineal gland that is released in substantial amounts.
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melatonin
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The thymus produces the thymosine hormone which presumably function to cause the maturation of _____________ which are critical for the development of immunity.
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T-lymphocytes
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What do the adrenal glands con of?
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gladular cortex, medulla
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What are the sex hormones released by the adrenal cortex?
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androgens; estrogens
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