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22 Cards in this Set
- Front
- Back
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neuron |
a cell that carries information through the nervous system |
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nerve impulse |
the message carried by a neuron |
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nerve |
a bundle of nerve fibers |
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reflex |
an automatic response that occurs rapidly and without conscious control |
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synapse |
the junction where one neuron can transfer an impulse to the next structure |
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peripheral nervous system |
the division of the nervous system consisting of all of the nerves located outside the central nervous system |
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central nervous system |
the division of the nervous system consisting of the brain and spinal cord |
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gland |
an organ that produces and releases chemicals either through ducts or into the bloodstream |
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duct |
a tiny tube through which chemicals are released from a tiny gland |
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hormone |
a chemical that affects growth and development |
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target cell |
a cell in the body that recognizes a hormone's chemical structure |
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hypothalamus |
a part of the brain that links the nervous system and the endocrine system |
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pituitary gland |
an endocrine gland that regulates many body activities and controls the actions of several other endocrine glands |
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negative feedback |
a process in which a system is turned off by the condition it produces |
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fertilization |
the process in sexual production in which an egg cell and a sperm cell join together to form a new cell |
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sperm |
male sex cell |
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zygote |
a fertilized egg produced by the joining of a sperm cell and an egg cell |
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egg |
female sex cell |
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testes |
organ of the male reproductive system in which sperm and testosterone are produced |
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testosterone |
a hormone produced by the sperm and adult make chararistics |
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ovary |
organ of which the female reproductive system in which eggs and estrogen are produced |
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Fallopian tube |
a passageway |
