Thermoregulatory system Flashcards

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1
Q

What is homeostasis?

A

The maintenance of a constant internal environment

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2
Q

What happens when an animal gets too hot?

A

The heat loss centre in the hypothalamus is stimulated

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3
Q

What happens when an animal gets too cold?

A

The heat gain centre of the hypothalamus is stimulated

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4
Q

What three parts are involved in thermoregulation?

A

• Thermoreceptors
• A thermoregulatory centre
• Effectors

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5
Q

What is an endotherm?

A

Body temp is regulated by internal sources

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6
Q

What is an ectotherm?

A

Body temp is regulated by external sources

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7
Q

What is poikilotherm

A

Body temp fluctuates with the environment

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8
Q

Give three evaporative cooling mechanisms

A

• Gular fluttering
• Sweating
• Panting

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9
Q

Give 2 symptoms of hypothermia

A

•Confusion
•Memory loss
•Shivering

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10
Q

Give 2 symptoms of hyperthermia

A

•Blurred vision
•Dizziness
•Fatigue
•Headache

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11
Q

What is piloerection?

A

Pilli erector muscles in the skin cause hair/feathers to stand on end - traps a layer of watm air between the hair and the skin - reduces heat loss

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12
Q

What is pilorelaxation?

A

• Erector muscles relax and hairs/feathers lower to skin so air can circulate - convection and evaporation

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13
Q

Give 2 warming methods

A

• Shivering
• Brown adipose tissue

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14
Q

Normal body temp for a human

A

37

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15
Q

Normal body temp for a dog

A

38

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16
Q

Normal body temp for a pig

A

39

17
Q

Normal body temp for a chicken

A

41