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science test

the science test thingy

TermDefinition
what are your brain and spinal cord protected by? bones
glial nerve cells that surrounds neurons and protects them
bones protects your brain and spinal cord
nerve cells that surrounds neurons and protects them glial
what are the two types of neurons? the motor and sensory
motor neurons carries messages away from the brain and spine to rest of body
sensory neurons takes information from eyes, ears, nose, tongue and skin to brain
signals only go in.. ..one direction
control center sends.. ..and receives messages
what speed can your brain send messages at? 200 m/h
how long is the longest neuron in your body? 3 feet - from spine to big toe
how many neurons does the brain contain? 100 billion
Information is sent from neuron to neuron as.. ..it travels to or from the brain.
the nervous system is made out of.. ..made up of brain, spinal cord, & large network of nerves that cover your whole body
the nervous system helps.. ..different parts of our body communicate
central nervous system contains.. ..brain and spinal cord
peripheral nervous system is.. ..nerves outside brain and spinal cord
what are the two parts of the peripheral system? automatic and the somatic
automatic peripheral.. ..work automatically without thinking - EX: heartbeat, blinking
somatic peripheral.. ..is muscle movement we control, and reflexes- EX: jumping
the nervous system is like.. ..a postal system
how small are the messages nerves send? they're as tiny as electrical signs
stimuli send messages to neurons in the form of.. ..sound waves & chemicals
neurons receive.. ..messages
messages are sent through.. ..spinal cord to brain
neurons are.. microscopic nerve cells that make up the brain, spinal cord, and nerves
how many neurons can fit on a pinhead? 30,000
Each neuron contains: Cell body with nucleus, Dendrites, and Axons
do neurons touch? NO.
dendrites are.. ..fibers that receive messages from other neurons
axons are.. ..fibers that send messages to other neurons
Messages are sent across the synapses by special chemicals called.. neurotransmitters
The use of neurotransmitters causes an.. ..electrical current
There is enough electrical current in the brain to.. ..power a flashlight
what is the brain? a mass of 100 billion neurons located inside the skull
Learning occurs as more and stronger connections are made between.. ..neurons
the cerebrum is.. ..the largest part of the human brain
the cerebrum is responsible for.. thought, language, senses, memory, voluntary movement
cerebellum is.. ..at the base of the brain
the cerebellum is responsible for.. ..muscle coordination, balance, posture
the brainstem.. ..connects brain to spinal cord
the brainstem is responsible for.. breathing, swallowing, heartbeat, blood pressure
the spinal cord is.. ..a column of nerves from brain to tailbone
what is the spinal cord protected by? bones/vertebrae of spine
the spinal cord is responsible for.. conducting impulses between the brain and the rest of the body
how fast may the impulse the spinal cord conduct be? 68 miles/hr
nerves are.. visible bundles of axons and dendrites that extend from the brain and spinal cord to all other parts of the body
sensory neurons.. ..carry messages from body to brain (pain, pressure, temperature)
motor neurons.. ..carry messages from brain to body to respond
interneurons.. ..carry nerve impulses from one neuron to another
a concussion a temporary disturbance of the brain’s ability to function due to a hard blow to the head
a paralysis a loss of sensation and movement of part of the body due to an injury of the spinal cord or brain
parkinson’s disease the brain does not produce enough of the neurotransmitter that transmits messages from the brain to muscle
alzheimer’s disease a gradual shrinking of the neurons in the cerebrum.
epilepsy abnormal transmission of messages between the neurons in the brain
Created by: user-1980699
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