B10 - The Human Nervous System Flashcards

1
Q

D. Homeostasis

A

The regulation of internal conditions of a cell or organism to maintain optimum conditions for function, in response to internal and external changes.

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2
Q

D. Receptors

A

Cells that detect change in the internal and external environment.

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3
Q

D. Coordination centres

A

Areas that recieve and process the information from receptors and send our signals to coordinate the response of the body. (Inc. brain, pancreas…)

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4
Q

D. Effectors

A

Muscles or glands that bring about responses to the stimulus that has been received. These responses restore conditions in the body to optimum levels.

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5
Q

3 examples of internal conditions?

A
  • body temp
  • water content of the body
  • blood glucose concentration
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6
Q

D. Neurons

A

Special cells that pass an electrical impulse with information in along them.

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7
Q

D. Nerves

A

Bundles of hundreds/ thousands of neurons

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8
Q

CNS stands for?

A

Central nervous system

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9
Q

CNS made up of?

A

Brain and the spinal cord

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10
Q

D. Sensory neurons

A

Cells that carry electrical impulses from your sense organs to CNS

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11
Q

D. Motor neurons

A

Cells that carry information from CNS to rest of body

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12
Q

Nervous system summed up by

A

stimulus>receptor>coordinator(CNS)> effector

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13
Q

D. Stimuli

A

Changes in the environment

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14
Q

D.Reflexes

A

Automatic responses
eg: touch something hot and pull hand away

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15
Q

D. Synapses

A

Physical gaps between the neurons.
Electrical impulse turn into chemical impulses to cross the synapses

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16
Q

Reflex Arc process?

A

Stimulus>Receptor>Sensory neurone>Relay neurone>Motor receptor>effector>response

17
Q

Function of myelin sheath?

A

Insulation increases speed of impulse