Stimulus
a change or signal in the environment that can make an organism react
Reflex
an automatic response of the body that occurs very rapidly and without conscious control
Spinal Cord
a thick column of nerve tissue that links the brain to nerves in the peripheral nervous system
Cerebrum
part of the brain that interprets input from your senses, controls movement, and carries out complex mental prosses like learning
Brain Stem
part of the brain controls your body's involuntary actions
Cerebellum
part of the brain that coordinates your muscle actions and helps keeps your balance
neuron
the cell of the nervous system, sometimes referred to as a brain cell or nerve cell
Which part of the brain is the cerebellum? (A, B, or C)
C
Which part of the brain is the cerebrum? (A, B, or C)
A
Which part of the brain is the brain stem? (A, B or C)
B
Which part of the brain coordinates muscle actions & helps keep your balance? (A, B, or C)
C
Which part of the brain controls involuntary actions? (A, B, or C)
B
Which part of the brain interprets your senses, controls movement, and carries out complex mental processes such as learning? (A, B or C)
A
Inner lining of the back of the eyeball; contains light sensitive receptor cells
retina
A structure of the eye that is flexible and focuses light
lens
Colored part of the eye; controls the amount of light that enters
iris
Opening in the center of the eye through which light passes
pupil
The clear tissue that covers the front of the eye
Retina
Identify the structure that focuses light. (A, B, C or D)
A
Identify the muscles of the iris adjust the size of the pupil. (A, B, C, or D)
D
True or False. Light enters the eye at the pupil and is reflected off the iris?
FALSE
Identify the cornea; the clear tissue that covers the front of the eye. (F, E, D or C)
E
The brain is a ________________ of the nervous system? (cell, tissue, organ, organ system, organism)
organ
The spinal chord is a ___________ of the nervous system? (cell, tissue, organ, organ system, organism)
organ
____________ is when your internal state is kept balance, in spite of changes in the outside environment.
Homeostasis