Bob Jones Life Science - Chapter 27
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| adrenal glands | An endocrine gland located on each kidney; secretes epinephrine (adrenaline) and other hormones.
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| axons | A part of a neuron that carries impulses away from the cell body.
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| brain stem | A part of the brain that controls involuntary actions.
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| central nervous system | The part of the nervous system consisting of the brain and spinal cord.
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| cerebral cortex | The outer layer of the cerebrum; has many wrinkles and folds in its surface.
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| cerebellum | The part of the brain that monitors and adjusts body activity involving muscle tone, body posture, and balance.
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| cerebrum | The part of the brain containing the major motor and sensory centers; controls voluntary muscle activity and is the area of conscious thought.
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| choroid | The middle layer of the eyeball.
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| cochlea | A coiled, tubular structure in the inner ear; contains fluid and the neurons that sense sound waves.
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| cones | A type of neuron in the retina that is sensitive to colors of light.
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| cornea | The clear front portion of the sclera of the eye.
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| dendrites | The part of the neuron that carries nerve impulses toward the cell body.
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| eardrum | A membrane over the opening to the middle ear; vibrates when sound waves enter the ear.
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| endocrine system | A system of hormone-producing glands.
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| eustachian tube | A tube leading from the pharynx to the middle ear; equalizes air pressure in the ear.
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| hormone | A chemical produced by living cells and transported to other body tissues where it causes a specific effect.
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| interneuron | A neuron of a reflex arc; located in the central nervous system; transmits impulses from a sensory neuron to other neurons.
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| iris | The colored (pigmented) portion of the eye; regulates the size of the pupil.
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| motor neuron | A neuron that receives impulses from the central nervous system and stimulates muscles or glands.
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| nerves | A number of neurons arranged side by side and wrapped in a protective covering.
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| neurons | A long thin nerve cell that carries impulses between various parts of the body.
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| peripheral nervous system | The part of the nervous system consisting of sensory receptors, sensory organs, and nerves that connect to the central nervous system.
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| pituitary glands | An endocrine gland attached to the lower part of the brain; secretes several hormones.
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| pupil | The circular opening in the iris of the eye.
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| reflex | A simple immediate response to a change in the environment; usually involuntary.
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| reflex arcs | A series of neurons that receive a stimulus and cause the body to react to it without conscious effort.
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| retina | The innermost layer of the eye; composed of light-sensitive neurons.
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| rods | A neuron in the retina used for vision in dim light.
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| sclera | The outer protective layer of the eye.
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| semicircular canals | A set of three structures, located in the inner ear; responsible for sensing balance.
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| sense organs | An organ that consists of many sensory receptors and various tissues needed to keep the receptors functioning, e.g., the eye or the ear.
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| sensory neuron | A neuron that receives stimuli and carries impulses toward the spinal cord or brain.
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| spinal cord | The cord of nerve tissue that conducts messages between the brain and the rest of the body.
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| synapse | The space between an axon and a dendrite or between an axon and the body structure it affects.
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| taste buds | A group of cells that sense taste.
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| thyroid | An endocrine gland in the neck; secretes the hormone thyroxine.
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| vestigial organ | An organ that has no apparent function; evolutionists claim it had a function but has lost it over a long period of evolution.
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| hi mom | hi son
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