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Life Sci - Chap 25

study guide

QuestionAnswer
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