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BIOL 1620 {Exam 2} > Ch 48 Pt 1 > Flashcards

Ch 48 Pt 1 Flashcards

1
Q

Which organ system originated from the mesoderm

A

Circulatory system

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2
Q

Role of the Nervous system

A

Integrate information and make appropriate responses

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3
Q

CNS

A

Encased in bone

Brain and spinal cord

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4
Q

PNS

A

Nerves

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5
Q

Neuron

A

Functional unit of the nervous system

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6
Q

Neuron Functions

A

Process information
Sense environmental changes
Communicate changes to other neurons
Command body responses

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7
Q

___ -> Cell body -> ___ -> terminal

A

Dendrite

Axon

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8
Q

Number and complexity of dendrites is correlated with

A

Amount of input the neuron receives

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9
Q

Glia

A

Support cells

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10
Q

Functions of the glia

A 
Structure
Chemical support
Insulates neurons
Forms blood-brain barrier
Guide neuronal migration and growth
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11
Q

Electrical signals

A

Action potential within a single neuron

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12
Q

Chemical signals

A

Neurotransmitter release between neurons

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13
Q

Transduction

A

Conversion of energy from one form to another

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14
Q

Synapse

A

Site of communication

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15
Q

Charged particles needed to produce an electric current

A

Na+ K+ Cl-

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16
Q

Separation of charge

A

Cell membrane and intracellular and extracellular fluid

17
Q

Membrane potential

A

Potential difference across plasma membrane

18
Q

Resting potential

A

Not actively signaling

-70mV

19
Q

Action potential

A

Active signaling

> 0 mV

20
Q

Depolarization

A

-20mV

Activation/increased activity

21
Q

Hyperpolarization

A

-90mV

Inhibition/decreased activity

22
Q

Ion gates and channels are needed to maintain

A

Action potential

23
Q

Leak channels

A

K+ and Cl-

24
Q

Voltage gated channels

A

Na+

25
Q

Ion pumps (require ATP)

A

Na+ out

K+ in

26
Q

3 forces that move ions

A

Concentration gradient
Electrical force
Active transport

27
Q

Concentration gradient

A

Chemicals move from high to low concentration

28
Q

Na+ always wants

A

In

29
Q

Equilibrium potential

A

No net movement

K+ = -80mV
Cl- = -65mV
Na+ = +62mV
30
Q

Which is not directly responsible for producing membrane potentials

A

Diffusion

31
Q

Driving force

A

Difference between where the membrane is and where the ion wants to be

32
Q

Action potential

A

Brief change in voltage from negative to positive

spike, nerve impulse, etc

BIOL 1620 {Exam 2} (10 decks)

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