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Life Sci - Chap 25
study guide
| Question | Answer |
|---|---|
| Explain the difference between the central nervous system and peripheral nervous system. | Central nervous system is your brain and spinal cord. Peripheral is the rest of the nervous system (nerves, etc) |
| Explain what a dendrite does. | receives electrical impulses |
| Explain what an axon does? | they carry impulses away from the cell body (send) |
| What is a neuron? | nerve cell that is specialized to transfer messages very quickly |
| What part of the nerve cell stores the nucleus and organelles? | cell body |
| Which way does a nerve impulse flow from axon, dendrite and cell body? | dendrite - cell body - axon |
| Explain the difference between sensory and motor neurons. | Sensory - senses information about what is happening in and around your body; motor - sends impulses from the brain and spinal cord to other systems |
| Give examples of a sensory impulse. | Receptors in eyes detect light (sight), smell, taste, touch, hearing |
| Give examples of a motor impulse. | squinting your eyes, goosebumps |
| Where do sensory impulses travel to? | to the brain |
| Where do motor impulses travel to? | to muscles or glands |
| What is a nerve? | it is a collection of axons bundled together with blood vessels and connective tissue |
| Explain what a somatic nerve response would be? | responses that you can control |
| Explain what an autonomic nerve response would be. | responses that you do without thinking |
| Give examples of a somatic nerve response. | jumping, moving your hand, thinking about a math problem |
| Give examples of an autonomic nerve response. | heart rate, digestion, breathing |
| What is the brain? | main control center of the nervous system |
| Explain what the cerebrum does for your body. | it is the area where you think and where most memories are stored |
| Explain what the cerebellum does for your body. | - SENSE of balance- also has to do with balance |
| Explain what the medulla does for your body. | controls involuntary processes like blood pressure, body temperature, heart rate and involuntary breathing |
| What is the largest part of the brain? | cerebrum |
| What is the function of the spinal cord? | passes impulses to and from the brain |
| List areas of the body where senses of touch occur. | hands, fingers, feet, toes, skin ( wherever you have receptors) |
| What is a reflex? | involuntary action |
| What part of the eye do you see images? | retina |
| What is the job of the lens? | to change the image for the retina so image will be focused |
| What is farsighted? | when you can see far but not near |
| What is nearsighted? | when you can see near but not far |
| What type of corrective lens corrects farsighted and then nearsighted? | farsighted - convex; near-sighted - concave |
| What part of the ear receives sound from the outside environment? | outer ear (pinna) |
| What area of the ear has tiny bones that vibrate sound? | middle ear |
| Explain the function of the cochlea. | it changes the waves into electrical impulses that get sent to the brain to interpret |
| What type of sensor cell detects taste? | taste cells |
| What part of the tongue detects salt, sweet, sour and bitterness? | back - bitter; front/tip - salt/sweet; sides - sour |
| The tiny bumps of the tongue that receives taste. | papillae (contains taste buds) |
| Explain the function of the endocrine system. | glands and groups of cells that secrete hormones that regulate growth, development and homeostasis |
| The organs of the endocrine that produce chemicals for your body. | glands |
| What are the chemicals of the glands called? | hormones |
| The type of hormone produced when someone becomes scared. | adrenaline |
| What is the function of the pituitary gland. | stimulates skeletal growth and helps thyroid gland work right |
| What part of the eye does light travel thru? | cornea/pupil |
| What is the function of the iris? | controls size of pupil which in turn affects how much light reaches retina |
| 43. What is the function of thyroid gland? | controls metabolism |
| 44. What is the function of the thymus gland? | fights disease - helps immune system |
| 45. What is the purpose of the pancreas gland.? | to control blood sugar |
| 46. What hormone is used to balance our blood sugar in our body? | insulin |
Created by:
msparks
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