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Definition
| Individual cells in the nervous system that receive, integrate, and transmit information. |
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| Chemicals that transmit information from one neuron to another. |
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Definition
| The branch of the autonomic nervous system that generally conserves bodily resources. |
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| What each sex invests-in terms of time, energy, survival risk, and forgone opportunities-to produce and nurture offspring. |
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Definition
| Left-right imbalances between the cerebral hemispheres in the speed of visual or auditory processing. |
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Term
| Peripheral nervous system |
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Definition
| All those nerves that lie outside the brain and spinal cord. |
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Definition
| The ways in which a person's genotype is manifested in observable characteristics. |
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Definition
| The “master gland“ of the endocrine system; it releases a great variety of hormones that fan out through the body, stimulating actions in the other endocrine glands. |
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Definition
| A mating system in which each female seeks to mate with multiple males, while each male mates with only one female. |
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| Characteristics that are influenced by more than one pair of genes. |
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Definition
| A mating system in which each male seeks to mate with multiple females, while each female mates with only one male. |
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Definition
| The larger collection of animals or people from which a sample is drawn and that researchers want to generalize about. |
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Term
| Postsynaptic potential (PSP) |
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Definition
| A voltage change at the receptor site on a postsynaptic cell membrane. |
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Term
| Primary sex characteristics |
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Definition
| The sexual structures necessary for reproduction. |
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Definition
| The period of early adolescence marked by rapid physical growth and the development of sexual (reproductive) maturity. |
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Definition
| A gene whose influence is masked when paired genes are different (heterozygous). |
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Definition
| A time following orgasm during which males are largely unresponsive to further stimulation. |
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Definition
| The stable, negative charge of a neuron when it is inactive. |
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Definition
| A process in which neurotransmitters are sponged up from the synaptic cleft by the presynaptic membrane. |
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| Secondary sex characteristics |
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Definition
| Physical features that are associated with gender but that are not directly involved in reproduction. |
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Definition
| The cell body of a neuron; it contains the nucleus and much of the chemical machinery common to most cells. |
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Definition
| The system of nerves that connect to voluntary skeletal muscles and to sensory receptors. |
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Definition
| A procedure in which the bundle of fibers that connects the cerebral hemispheres (the corpus callosum) is cut to reduce the severity of epileptic seizures. |
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Definition
| The branch of the autonomic nervous system that mobilizes the body's resources for emergencies. |
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Definition
| A junction where information is transmitted from one neuron to the next. |
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Definition
| A microscopic gap between the terminal button of a neuron and the cell membrane of another neuron. |
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Definition
| Small knobs at the end of axons that secrete chemicals called neurotransmitters. |
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Definition
| A structure in the forebrain through which all sensory information (except smell) must pass to get to the cerebral cortex. |
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Definition
| A research design in which hereditary influence is assessed by comparing the resemblance of identical twins and fraternal twins with respect to a trait. |
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Definition
| A one-celled organism formed by the union of a sperm and an egg. |
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