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
Science 7th grade
Nervous system modified review sheet
| Question | Answer |
|---|---|
| Homeostasis- | maintaining a constant internal balance; responding to stimuli |
| Stimuli- | An external or internal change that brings about a reaction |
| Neurons- | Nerve cells that are made up of axons, dendrites and cell body |
| Axons- | Carry impulses AWAY from the cell body |
| Dendrites- | Carry impulses TO the cell body |
| Sensory Neurons- | Send Impulses(information) to the Brain and Spinal cord |
| interneurons- | found in brain and spinal cord and send impulses from sensory neurons to motor Neurons |
| Motor Neurons- | relay information to muscles or glands in the body |
| Impulse transfer | Impulse moves from axon of one neuron to dendrites of another; Moves across synapse |
| Synapse- | space between axon and dendrites |
| neurotransmitters | chemicals that are released that carry impulse across synapse |
| central nervous System (CNS) | made up of brain and spinal cord |
| Peripheral Nervous System (PNS) | made up of all nerves outside of the CNS; all nerves in your head and coming off of spinal cord |
| Cerebrum | largest part; where thinking occurs; memory is stored and movements are controlled |
| Cortex | outer portion; have ridges and grooves that increase surface area so more complex thoughts can occur |
| Cerebellum | Under the cerebrum; coordinates voluntary muscle movements,maintain balance and muscle tone. i.e. helps ride a bike |
| Brain stem | base of brain; connects to brain to spinal cord |
| medulla | controls involuntary actions like hearbeat, breathing, blood pressure, coughing, sneezing swallowing and vomiting |
| Spinal cord | in adult is as wide as adult thumb |
| spinal cord | carries impulses from teh body to the brain and from the brain to the body |
| reflexs | involuntary automatic response to a stimulus - controlled in your spinal cord - brain acts after reflex to help you figure out what to do to make pain stop |
| Drugs | directly affect the nervous system |
| Drugs | destroy brain and liver cells |
| Drugs | can be a depressant and slow down responses of CNS as well as thinking processes |
| Drugs | can be a stimulant that speeds up heart rate, cause sleeplessness and can cause kidney to make more urine |
| Nearsighted | focus in front of retina |
| farsighted | focus behind retina |
| Cornea | transparent membrane that protects the eye - allows light to enter |
| Pupil | opening the fron of the eye that allows light to enter |
| Retina | light sensitive area in the back of the eye |
| rods | detect dim light; used in night vision |
| cones | detect colors |
| rods and cones | impulses from these photoreceptors travel to brain along the optic nerve |
| Iris | the part of the eye gives its color |
| lens | piece of curved material behind the pupil that allows the light to pass through but changes its direction - focuses entering light on the retina |
| Curved lens | looking at objects close to the eye - lens is more curved |
| flatter lens | looking at objects far away - lens is flatter |
| hearing-now sound moves | 1) sound begins when object starts to vibrate because air particles push on each other and transfer energy |
| hearing- now sound moves 2 | 2) waves move from outer ear to middle ear(causes tiny bones in eardrum to vibrate) to cochlea of the inner ear fluid |
| Job of neurons in cochlea | convert waves to electrical impulses and sends them to the part of the brain that interprets sound |
| Taste buds | contain receptors for taste; located in teh papillae |
| 4 types of taste buds | sweet sour salty bitter |
| Olfactory cells | receptors for smell that are located in the upper part of your nasal cavity. brain combines information from your taste buds and nose to give a sense of smell |
Created by:
kyky0597
Popular Science sets