Chapter 19 Flashcards
What is the definition of a response
What your body does in reaction to a stimulus
What is the definition of a reflex
A response that happens automatically
What part of the neuron carries impulses away from the cell body
Axon
What two things can a motor neuron send an impulse to
Gland and muscle
What is the column of nerve tissue that links the brain to the peripheral nervous system
Spinal cord
What does the somatic nervous system control
Voluntary actions
What produces sound
Vibrations
What do the senses of smell and taste detect
Chemicals in the air or in your food
Why is pain an important sensation
Alerts you to any danger
What is a synapse
The junction where one neuron can transfer and impulse to another structure
What division of the nervous system is made up by the brain and spinal cord
Central nervous system
What are the three regions of the brain? what are their functions?
Cerebellum- coordinates the actions of your muscles and helps you keep balance
Cerebrum – interprets input from the senses, controls movement, and carries out complex mental processes
Brainstem – controls your bodies involuntary action
What is a bruise like injury of the brain called
Concussion
What can result from spinal cord injuries
Paralyzed
What fiber carries impulses toward the nerve cell body
Dendrite
What part of the nervous system controls voluntary action
Somatic nervous system
What are three types of neurons? What are their functions?
Interneuron – carries nerve impulses from one neuron to another
Sensory neuron- picks up stimuli from the internal or external environment and converts into a nerve impulse
Motor neuron- sends an impulse to be muscle or gland
What are three functions of the nervous system
Receiving info, responding to info, maintaining homeostasis
What are the two divisions of the peripheral nervous system? What is the difference between their functions
Somatic nervous system -controls voluntary actions
Autonomic nervous system – controls involuntary actions
Describe two actions that help prevent injury to the brain and spinal cord
Wear a helmet and wear a seatbelt
What is the definition of a stimulus
any change or signal in the environment can make an organism react
What are the 3 main parts of a neuron? How does an impulse travel through a neuron
Dendrite > cell body > axon
