Homeostasis P1 Flashcards

1
Q

What does homeostasis do?

A

Maintains optimal conditions for enzyme action and cell functions

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2
Q

What does homeostasis control?

A

Blood glucose concentration, body temperature and water levels

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3
Q

What is involved in the nervous system?

A

The brain and spinal cord

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4
Q

What is the peripheral nervous system?

A

Nerves that carry information to or from the central nervous system

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5
Q

Define homeostasis

A

Maintenance of a constant internal environment in the body

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6
Q

What do receptors do?

A

Detect changes in the environment

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7
Q

What is the coordination centre?

A

Things like the brain which processes information from receptors around the body

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8
Q

What are effectors?

A

Muscles or glands which the coordinator generates a response in

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9
Q

What is a negative feedback loop?

A

Process where optimum levels are restored

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10
Q

What is the optimum body temp?

A

37°C

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11
Q

What do all control systems include?

A

Cells called receptors, the coordination Centre and effectors

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12
Q

What are some examples of coordination centres?

A

The brain, spinal cord or pancreas

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13
Q

What are nerve cells called?

A

Neurons

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14
Q

What are nerve cells adapted to do?

A

Carry electrical impulses

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15
Q

What is a bundle of neurones called?

A

A nerve

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16
Q

What are the three main types of neuron?

A

Sensory motor and relay

17
Q

What are the common features of the three main types of neuron?

A

Along fibre called an axon and tiny branches called dendrons

18
Q

If the function of the axon and how’s it adapted to this

A

It is insulated by a fatty (myelin) sheath to curry messages

19
Q

What are the functions of dendrons and how are they adapted for this

A

They brunch further as dross at the end and they receive incoming impulses from other neurons

20
Q

Nervous system response order

A

Receptor, sensory neurons, CNS and relay neurones, motor neurones and effectors

21
Q

Sense organs

A

Skin, tongue, nose, eye and ear