anatomy

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22 Terms

1

how much does the brain weigh?

3 lbs

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2

function of a neuron

process info to transmit it to different neurons, glands, and muscles

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3

what are the parts of a neuron?

  • dendriters (branch looking thing)

  • saulma/cell body

  • axon long and skinny part

  • mylin sheath (sausage looking thing)

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4

dendrite function

receives info from other neurons

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5

saulma/cell body function

collects and combines info received. sends nerve impulses to the axon

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6

axon function

carries messages to other glands/muscles

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7

what are nerve cells surrounded by/made up of?

potassium and sodium ions

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8

resting potential def

small electrical charge found outside the membrane

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9

how does myelin impact a nerve impulse?

increases the speed of the impulse

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10

action potential def

nerve impulse triggered as a result of neurons electrical charge reaching the threshold

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11

first person to measure the speed of a nerve impulse

Hernan Helmholtz

HH fast impulse

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12

what gets released when an impulse hits the bottom of an axon?

neurotransmitters are released

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13

synapses def

small spaces bwtn neurons

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14

what are the different nerveous systems in the human body?

  • central nervous system

  • peripheral nervous system

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15

what does the central nervous system consist of?

  • brain

  • spinal chord

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16

what does the peripheral nervous system consist of

  • somatic system

  • autonomic system

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17

what does the somatic system (in peripheral) do?

carries messages to and from the brain to different body parts

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18

what does the autonomic system do? (in peripheral)

sympathetic + autonomic system

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19

what is the corticalization of the brain?

wrinkles and fissures on the brain

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20

what connects the two hemispheres of the brain?

corprus collosum

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21

left hemisphere responsibilities

speaking, writing, language comprehensions

  • math

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22

right hemisphere responsibilities

creative, artistic, recognizing visual patterns, facial expressions

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