Book 3 Flashcards
(33 cards)
Stimulus
Any change or signal isn’t eh environment that an organism can recognize and react to
Response
A reaction to a stimulus
Neurons
Cells that carry information through your nervous system
Nerve impulse
The message that a neuron carries
Dendrite
Branchlike structure that picks up impulses
Axon
A long structure leading away from the cell body (impulses move through the axon)
Nerve
A bundle of nerve fibers
Sensory neuron
Picks up a stimulus and converts it into a nerve impulse
Interneuron
Carries a nerve impulse to another interneuron or motor neuron
Motor neuron
Send an impulse to a muscle or gland, enabling it to respond
Synapse
The place where a neuron transfers an impulse to another structure
Central nervous system
Includes the brain and spinal cord and acts like a traffic cop
Peripheral nervous system
Includes all nerves outside of the central nervous system
Brain
Control center of the nervous system
Spinal cord
A thick column of nervous tissue that links that brain to the peripheral nervous system
Cerebrum
Interprets input from your senses, controls movement, and carries out complex mental processes such as learning and remembering
Brain stem
Controls your body’s involuntary actions
Cerebrum
Interprets input from your senses, controls movement, and carries out complex mental processes such as learning and remembering
Cerebellum
Coordinates your muscle actions and helps you keep your balance
Somatic nervous system
Controls voluntary actions.
Autonomic nervous system
Controls involuntary actions
Reflex
An automatic response that occurs rapidly without conscious control
Cornea
The clear tissue that covers the front of the eye
Pupil
The opening through which light enters the eye
