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Biology Revision > Communication & Homeostatis > Flashcards

Communication & Homeostatis Flashcards

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1
Q

What’s the first messenger?

A

A hormone

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2
Q

What’s the second messenger?

A

A signalling molecule

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3
Q

What do alpha cells (pink stained) secrete?

A

Glucagon

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4
Q

What do beta cells (purple stained) secrete?

A

Insulin

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5
Q

What detects change in temperature?

A

Thermoreceptors in hypothalamus detect change in internal temperature
Thermoreceptors in skin detect change in external temperature

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6
Q

What’s thermoregulation?

A

Control of body temperature

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7
Q

How is heat lost once vasodilation happens?

A

Heat is lost via radiation

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8
Q

What hormones are released when temperature too cold?

A

Adrenaline and thyroxine

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9
Q

What do the hormones which are released when temperature too cold do?

A

They increase metabolism which generates heat

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10
Q

How much energy is released when a phosphate molecule is removed in hydrolysis in ATP?

A

30 kJ

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Biology Revision (21 decks)

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