Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
BJU Life Science 22
Bob Jones Life Science - Chapter 22
| Question | Answer |
|---|---|
| central nervous system | The part of the nervous system consisting of the brain and spinal cord |
| peripheral nervous system | The part of the nervous system consisting of sensory receptors, sensory organs, and the nerves that connect to the central nervous system |
| neuron | A long, thin nerve cell that carries electrochemical impulses between various parts of the body |
| dendrite | The part of a neuron that carries nerve impulses toward the cell body |
| axon | The part of a neuron that carries impulses away from the cell body |
| nerve | A bundle of neurons wrapped in a protective covering that carries impulses to different areas of the body |
| nerve impulse | An electrochemical pulse that travels along the cell membrane of a neuron |
| synapse | The space between an axon of one neuron and the dendrite of another neuron or between an axon and the body structure it affects |
| reflex | An immediate, involuntary response to a change in the environment |
| cerebrum | The largest part of the brain, containing the major motor and sensory centers; controls voluntary muscle activity and is the area of conscious acitivity |
| cerebellum | The second-largest part of the brain; monitors and adjusts involuntary body activities involving muscle tone, body posture, and balance |
| brian stem | A part of the brain that controls breathing, heartbeat, blood pressure, and some other involuntary actions |
| spinal cord | The cord of nerve tissue that conducts messages between the brain and the rest of the body |
| sense organ | An organ such as the eye or ear that consists of many sensory receptors and various tissues needed to keep the receptors functioning |
| sclera | The outer, protective layer of the eye; the white of the eye |
| cornea | The clear front portion of the sclera of the eye |
| choroid | The middle layer of the eye |
| iris | The colored (pigmented) portion of the eye that regulates the size of the pupil |
| pupil | The circular opening in the iris of the eye that allows light to enter the eyeball |
| retina | The innermost layer of the eye that is composed of light-sensitive neurons (photoreceptors) |
| rod | A neuron in the retina that permits vision in dim light |
| cone | A structure in conifers that contains seeds; a neuron in the retina that is sensitive to colors of light |
| tympanic membrane | A membrane over the opening to the middle ear that sounds waves cause to vibrate |
| eustachian tube | A tube leading from the pharynx to the middle ear that equalizes air pressure in the ear |
| cochlea | The coiled, tubular structure in the inner ear that contains fluid and the neurons that sense sound waves |
| semicircular canals | A set of three structures in the inner ear that are responsible for sensing balance |
| endocrine system | A system of hormone-producing glands |
| hormone | A chemical produced by living cells that is transported to other body tissues where it causes a specific effect |
| negative feedback system | A method of hormone control in which the product inhibits the system |
| pituitary gland | An endocrine gland attached to the lower part of the brain that secretes several hormones, including growth hormone |
| adrenal glands | An endocrine gland located on each kidney that secretes epinephrine (adrenaline) and other hormones |
| thyroid gland | An endocrine gland in the neck that secretes the hormone thyroxine |
Created by:
marchscience
Popular Biology sets