Nervous system quiz Flashcards
what does the nervous system control?
the activities of each of the body’s other organs
what are the names of the 3 parts or mini systems of the nervous system?
central nervous system, peripheral nervous system, and autonomic nervous system
what does CNS stand for?
central nervous system
what does PNS stand for?
peripheral nervous system
what does ANS stand for?
autonomic nervous system
the central nervous system consists of…?
the brain and spinal cord
what does the peripheral nervous system do?
sends impulses to the central nervous system then to the rest of the body
what does the autonomic nervous system do?
sends impulses to a special area of the brain called the medulla
what does the medulla do?
controls all of our involuntary functions
what involuntary functions does the medulla control?
digestion, heartbeat, breathing, blood pressure and reflexes
neurons are individual specialized cells that join to form…?
nerves
the specialized job of the neurons is to…?
receive and transmit impulses throughout the body
how many miles per hour does a nerve impulse travel?
200 miles
what are the two types of neuron fibers?
dendrites and axons
What do dendrites do?
they carry impulses toward the main part of the cell
what do axons do?
take impulses away from the cell to other neurons
what are the two kinds of neurons?
sensory and motor
what do sensory neurons do?
receive and pass information about the temperature outside the body or pain within the body
what do motor neurons do?
receive and carry impulses to the brain then the muscles and other organs of the body
what is the master organ of the body?
the brain
how much does the brain weigh?
3 pounds
the brain is protected by three layers of membranes called?
meninges
when you touch a hot stove, what is the order of neurons involved?
touch the stove, sensory, to axons that travel to your brain to the dendrites and then motor when you move your hand.
the first layer of the meninges is..?
a tough outer layer that protects the brain
