Note
Studied by 14 people
Untitled Flashcards Set
1
q
Cornea
a
a clear tissue that covers the front of the eye.
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2
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Pupil
a
opening in which light enters the eye.
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3
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Iris
a
a circular structure that surrounds the pupil and regulates how much light enters the eye.
It gives the eye its color.
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4
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Lens
a
flexible structure that focuses light.
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5
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Retina
a
lines the back of the eye and contains light-sensitive cells.
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6
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Nearsightedness
a
see near objects clearly but not distant ones.
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7
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Farsightedness
a
see distant objects clearly but not close ones.
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8
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Eardrum
a
is a membrane that vibrates when sound strikes it.
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9
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Cochlea
a
a snail-shaped tube that is lined with sound receptor cells.
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10
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Semicircular canals
a
which helps your CNS maintain its balance.
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11
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Central Nervous System
a
It acts like a traffic cop and is made of the brain and the spinal cord.
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12
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Peripheral Nervous System
a
includes the nerves outside the CNS and they are like car drivers.
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13
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Brain
a
is the control center.
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14
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Spinal cord
a
is a thick column of nervous tissue that links the brain to the PNS.
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15
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Cerebrum
a
interprets the things you feel and carries out a complex mental process like learning or remembering.
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16
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Cerebellum
a
Coordinates your muscle actions and helps you keep balance.
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17
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Brain stem
a
controls your body’s involuntary actions such as heartbeat.
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18
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Left half
a
It is usually associated with logical thinking.
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19
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Right half
a
is usually associated with creative thinking and artistic skills.
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20
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Somatic nervous system
a
controls voluntary actions such as using a fork.
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21
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Autonomic nervous system
a
controls involuntary actions such as digesting food.
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22
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Reflex
a
an automatic response that occurs without conscious control.
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23
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Concussion
a
occurs when the soft tissue of the brain collides with the skull causing it to bruise.
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24
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Involuntary
a
an action not in your control.
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25
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Sense organ
a
are body structures that gather info from your surroundings.
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26
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Voluntary
a
an action that is under your conscious control.
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27
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Neurons
a
cells that carry info throughout your nervous system.
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28
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Nerve Impulse
a
is the message that a nerve carries.
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29
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Stimulus
a
any change that an organism can recognize.
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30
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Response
a
is a reaction to a stimulus.
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31
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Dendrite
a
a branch-like structure that picks up the impulses.
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32
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Axon
a
the long structure leading away from the cell.
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33
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Nerve
a
a bundle of nerve fibers.
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34
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Sensory neuron
a
picks up a stimulus and converts it into a nerve pulse.
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35
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Interneuron
a
carries a nerve impulse to another interneuron or motor neuron.
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36
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Motor neuron
a
sends an impulse to a muscle or gland.
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37
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Synapse
a
a place where neurons transfer to another structure.
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38
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What is the role of the nervous system?
a
it receives info about what is happening inside and outside your body.
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39
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Taste buds
a
sensory receptors on your tongue that respond to chemicals from the food.
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40
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drug
a
any chemical is taken into the body that causes change in their body or behavior.
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41
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drug abuse
a
if medicine or drugs are used in nonmedical ways or they are illegal
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42
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Tolerance
a
is a state in which the drug user needs more of a drug to produce the same effect
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43
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addiction
a
the body becomes physically dependent on the drug
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44
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withdrawal
a
an adjustment period in which the person stops taking the drug
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45
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Depressants
a
slow down the activity of the CNS such as alcohol
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46
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stimulants
a
they speed up the body’s process such as caffeine
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47
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Anabolic steroids
a
are synthetic chemicals that are similar to some hormones produced in the body.
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48
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alcoholism
a
is a disease in which a person is physically and emotionally addicted to alcohol and often experiences withdrawal symptoms when not consuming it. It can lead to significant health issues, impaired social functioning, and various psychological problems.