Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

39 Cards in this Set

  • Front
  • Back
a change in an organism's surroundings that cause the organism to react
an action or change in behavior that occurs as a result of a stimulus
a cell that carries messages through the nervous system
nerve impulse
the message carried by a neuron
a threadlike extension of a neuron that carries nerve impulses toward the cell body
a threadlike extension of a neuron that carries nerve impulses away from the cell body
a bundle of nerve fibers
sensory neurons
a neuron that picks up stimuli from the internal or external environment & converts each stimulus into a nerve impulse
a neuron that carries nerve impulses from 1 neuron to another
motor neuron
a neuron that sends an impulse to a muscle, causing the muscle to contract
the tiny space between the tip of an axon and the next structure
central nervous system
the brain and spinal cord- major organs
the control center of the body
peripheral nervous system
all the nerves located outside the central nervous system; connects the central nervous system to all parts of the body
the part of the central nervous system that is located in the skull and controls most functions in the body
spinal cord
the thick column of nerve tissue that is enclosed by the vertebrae and that links the brain to most nerves in the peripheral nervous system
the part of the brain that interprets input from the senses, controls the movement of skeletal muscles, and carrries out complex mental processes
the part of the brain that controls many body functions that occur automatically
somatic nervous system
the group of nerves that controls voluntary muscles
autonomic nervous system
the group of nerves that conrols involuntary muscles
an automatic response that occurs very rapidly and without conscious control
a bruiselike injury of the brain that occurs when the soft tissue of the cerbrum bumps against the skull
the clear tissue that covers the front of the eye
the opening through which light enters the eye
the circular structure that surrounds the pupil & regulates the amount of light entering the eye
the flexible structure that focuses light that has entered the eye
the layer of receptor cells at the back of the eye on which an image is focused; nerve impulses are sent from the retina to the brain
the condition in which nearby objects canbe seen clearly but distant objects are blury
the condition in which distant objects are seen clearly but nearby objects are blury
the membrane that seperates the outer ear from the middle ear, & that vibrates when sound waves strike it
a snail shaped tube in the inner ear lined with sound receptors; nerve impulses are sent from the cochlea to the brain
semicircular canal
stuctures in the inner ear that are responsible for the sense of balance
any chemical that cause change in a persons behavior or body
drug abuse
the deliberate misuse of drugs for purposes other than appropriate medical ones
a state in which a drug user, after repeatedly taking a drug, needs larger & larger doses of the drug to produce the same effect
a period af adjustment that occurs when a drug dependent person stops taking the drug
a drug that speeds up body processes
a drug that slows down the activity of the central nervous system
anabolic steroid
synthetic chemicals that are similar to hormones produced in the body that may increase muscle size and cause mood swings
a disease in which a person is both physically addicted to and emotionally dependent on alcohol