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116 terms

The Nervous System

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synapse
A ________ is a small space across which an impulse travels to move from one neuron to another.
central
The ________ nervous system is made up of the brain and spinal cord.
peripheral
The ________ nervous system is made up of all the nerves outside the brain and spinal cord.
dendrite
What is the branch part of the neuron that receives messages and sends them to the cell body?
axon
What is the branch part of the neuron that transports messages away from the cell body?
neuron
A ________ is made up of a cell body, dendrite, and axon.
reflex
When a movement causes the spinal cord to interpret an impulse from the brain from sensory receptors this movement is called a ________.
spinal cord
Which part of the body is made up of bundles of neurons that carry impulses from all parts of the body to the brain and from the brain to all parts of the body?
homeostasis
The regulation of steady, life-maintaining conditions inside an organisms is called ________.
cerebrum
This is the largest part of the brain.
cerebellum
This part of the brain coordinates voluntary muscle movements.
stimuli
The senses act as the body's alert system, reacting to ________ and transmitting impulses to the brain.
light rays
The eye detects ________ ________ and transmits impulses to the brain through the optic nerve.
optic nerve
The eye detects light rays and transmits impulses to the brain through the ________ ________.
sound waves
The ear, along with detecting and transmitting ________ ________, also controls the body's balance by reacting to motion and gravity.
balance
The ear, along with detecting and transmitting sound waves, also controls the body's ________ by reacting to motion and gravity.
olfactory cells
The ________ ________ in the nasal passages detect molecules in the air, transmitting these impulses as odors.
molecules
The olfactory cells in the nasal passages detect ________ in the air, transmitting these impulses as odors.
taste buds
On the tongue ________ ________ can detect five different stimuli: sweet, sour, bitter, salty, and the taste of MSG.
sweet
The taste buds on your tongue can detect the stimuli of ________, sour, bitter, salty, and the taste of MSG.
sour
The taste buds on your tongue can detect the stimuli of sweet, ________, bitter, salty, and the taste of MSG.
bitter
The taste buds on your tongue can detect the stimuli of sweet, sour, ________, salty, and the taste of MSG.
salty
The taste buds on your tongue can detect the stimuli of sweet, sour, bitter, ________, and the taste of MSG.
stimulus
A ________ is any change inside or outside your body that brings about a response in a living organism.
neurons
Your nervous system is made up of ________ which are made up of a cell body and branches of dendrites and axons.
dendrite
This is the part of the neuron that receives messages and send them to the cell body.
axon
This is the part of the neuron that carries messages away from the cell body.
impulses
Messages carried by nerve cells are called ________.
three
You have ________ kinds of nerve cells.
sensory
Nerve cells that receive information and send impulses to the brain or spinal cord are called ________ neurons.
interneurons
Nerve cells that relay impulses from sensory nerve cells to motor nerve cells are called ________.
motor
Nerve cells that conduct impulses from the brain to muscles and glands throughout your body are called ________ neurons.
touch
Nerve cells do not ________ each other, yet still pass impulses to each other.
impulses
Nerve cells do not touch each other, yet still pass ________ to each other.
space
A synapse is a ________ between nerve cells.
synapse
A ________ is a space between nerve cells.
chemical
When an impulse reaches the end of an axon, the axon releases a ________.
dendrite
When an impulse reaches the end of an axon, the axon releases a chemical that flows across the synapse and relays the impulse to the ________ of the next neuron.
brain
The ________ coordinates all of your body activities.
cerebrum
This is the part of the brain that interprets impulses from the senses, stores memory, and controls movements.
cerebrum
Thinking takes place in this part of the brain.
cerebrum
This is the largest part of the brain.
cortex
The outer layer of the brain is called the ________, which allows more complex thoughts to be processed.
cerebellum
This part of the brain is located behind and under the cerebrum.
cerebellum
This part of the brain interprets stimuli from the eyes, ears, muscles, and tendons.
cerebellum
This part of the brain coordinates voluntary muscle movements, maintains muscle tone, and helps maintain balance.
brain stem
The ________ ________ is the part of the brain the extends from the cerebrum and connects it to the spinal cord.
brain stem
What part of the brain is made up of the midbrain, the pons, and the medulla?
medulla oblongata
What part of the brain stem controls involuntary actions such as heartbeat, breathing, and blood pressure?
spinal cord
Which part of the nervous system is made up of bundles of nerve cells that carry impulses to and from the brain?
peripheral
The ________ nervous system connects your brain and spinal cord to the rest of your body.
two
The peripheral nervous system has ________ systems.
somatic
In the peripheral nervous system the ________ system controls voluntary actions.
autonomic
In the peripheral nervous system the ________ system controls involuntary actions.
injury
Any ________ to the brain or spinal cord can be serious.
paralysis
Injury to the spine can result in loss of muscle movement called ________.
safety gear
It is important to wear ________ ________ when playing sports or riding in a car or on a bicycle.
reflex
A ________ is an involuntary, autonomic response to a stimulus controlled by the spinal cord.
alcohol
Drugs like ________ and caffeine affect your nervous system.
caffeine
Drugs like alcohol and ________ affect your nervous system.
slows
Alcohol ________ the activities of the central nervous system.
speeds
Caffeine ________ up the activity of the central nervous system.
five
Your body has ________ senses.
retina
When light energy enters your eye the cornea and lens focus it onto the ________.
rods
The light energy that enters your eye stimulates the ________ and cones located in your retina.
cones
The light energy that enters your eye stimulates the rods and ________ located in your retina.
optic nerve
The rods and cones send impulses to the ________ ________, which carries them to the visual area of the cortex.
nearsighted
When light is focused in front of the retina a person is ________.
farsighted
When light is focused in behind the retina a person is ________.
front
When light is focused in ________ of the retina a person is nearsighted.
behind
When light is focused ________ the retina a person is farsighted.
concave
To correct nearsightedness a person needs to wear a ________ lens which is thicker at the edges than in the middle.
convex
To correct farsightedness a person needs to wear a ________ lens which is thicker in the middle than at the edges.
sound waves
When an object vibrates, it produces ________ ________ necessary for hearing sound.
pinna
Your outer ear called the ________ captures sound waves and sends them to the ear canal.
eardrum
In the middle ear, sound waves cause the ________ to vibrate.
hammer
In the middle ear when the eardrum vibrates it will vibrate tiny bones called the ________, anvil, and stirrup.
anvil
In the middle ear when the eardrum vibrates it will vibrate tiny bones called the hammer, ________, and stirrup.
stirrup
In the middle ear when the eardrum vibrates it will vibrate tiny bones called the hammer, anvil, and ________.
cochlea
In the inner ear, vibrations cause the fluids in the ________ to vibrate, stimulating nerve endings.
balance
The cristae ampullaris and the maculae in the middle ear control the body's ________.
molecules
Food and other objects give off ________ into the air.
olfactory cells
When you smell, molecules from food and other objects stimulate nerve cells called ________ ________ in your nasal passages.
taste buds
What are the major sensory receptors for taste?
taste buds
Your tongue contains ________ ________ that help you to sense tastes.
internal organs
For your sense of touch sensory receptors are found in ________ ________ and skin.
skin
For your sense of touch sensory receptors are found in internal organs and ________. These sensory receptors can pick up changes in touch, pressure, pain, and temperature.
outer ear
In this picture of ear structure what is letter "A" ?
middle ear
In this picture of ear structure what is letter "B" ?
inner ear
In this picture of ear structure what is letter "C" ?
pinna
In this picture of ear structure what is letter "M" ?
ear canal
In this picture of ear structure what is letter "L" ?
eardrum
In this picture of ear structure what is letter "J" ?
malleus
In this picture of ear structure what is letter "K" ?
incus
In this picture of ear structure what is letter "H" ?
stapes
In this picture of ear structure what is letter "I" ?
cochlea
In this picture of ear structure what is letter "F" ?
semicircular canals
In this picture of ear structure what is letter "D" ?
eustachian tube
In this picture of ear structure what is letter "G" ?
auditory nerve
In this picture of ear structure what is letter "E" ?
cornea
In this picture of eye structure what is letter "B" pointing to?
pupil
In this picture of eye structure what is letter "C" pointing to?
lens
In this picture of eye structure what is letter "E" pointing to?
scelera
In this picture of eye structure what is letter "A" pointing to?
retina
In this picture of eye structure what is letter "J" pointing to?
optic nerve
In this picture of eye structure what is letter "G" pointing to?
retinal artery
In this picture of eye structure what is letter "I" pointing to?
retinal vein
In this picture of eye structure what is letter "H" pointing to?
scelera
In this picture of eye structure what is letter "F" pointing to?
farsightedness
Does this picture show farsightedness or nearsightedness?
nearsightedness
Does this picture show farsightedness or nearsightedness?
dendrite
In this picture of neuron structure what is letter "A" pointing to?
cell body
In this picture of neuron structure what is letter "B" pointing to?
nucleus
In this picture of neuron structure what is letter "C" pointing to?
myelin sheath
In this picture of neuron structure what is letter "D" pointing to?
axon
In this picture of neuron structure what is letter "E" pointing to?