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Biology > Reflex > Flashcards

Reflex Flashcards

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0
Q

Focussing on something close- what happens?

A

Ciliary muscles contract
Suspensory muscles slacken
Gets F A T

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1
Q

Accommodation is..?

A

Focussing eye

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2
Q

What happens to the iris in dim light?

A

Iris muscles slacken

Radial muscles contract

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3
Q

How does sweat take body heat away?

A

Needs energy to evaporate
LATENT HEAT OF VAPORISATION
-provided by body heat

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4
Q

How do hairs cool us down?

A

Hair erector muscles relax
Less air trapped
More heat conducts away

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5
Q

How does vasodilation cool us down?

A

More blood flows through capillaries

More heat radiates away

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6
Q

How does the body keep warm?

A

Increase metabolism- generates heat
Shiver- muscles contract/relax rapidly- produces heat
Piloerection- hair erectors contract

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7
Q

When humid, what happens to sweat levels?

A

Less evaporation
Cannot cool
More sweating

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Biology (14 decks)

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