Chapter 2 - Biology & Behavior Flashcards

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0
Q

what system recieves, sends, and acts?

A

the nervous system

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1
Q

What two primary systems direct the actions of the body?

A
  • the nervous system

- the endocrine system

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2
Q

what system regulates internal body activity with glands that secrete chemicals (hormones) into the body?

A

the endocrine system

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3
Q

what do tou call the vast network of cells that tell you what is going on inside and outside your body?

A

the nervous system

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4
Q

what are nuerons?

A

specialized mervous system cells that send and recieve messages

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5
Q

what are the functions of glial cells?

A
  • direct neuron growth
  • stable chemicals
  • provide energe
  • repair
  • prun connections
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6
Q

what is a cell’s skin called?

A

the outer membrane

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7
Q

what type of cell does not have an outer membrane?

A

red blood cells

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8
Q

what is the function of mitochondria?

A

to turn oxygen and glucose into energy

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9
Q

what is the percentage of weight for the brain?

A

2%

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10
Q

what percentage of oxygen does the brain use?

A

less than 20%

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11
Q

how many axons does a neuron generally have?

A

1

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12
Q

what are dendrites?

A

they are the fibers that recieve signals from the axon

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13
Q

how many dendrites does a neuron have?

A

many, with each having many branches

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14
Q

axons v. dendrites

A

axons carry and dendrites detect

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15
Q

what is the communical signal between neurons?

A

an electrochemical pulse called an action potential