Biology: Responding to the Environment

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What does the Sodium Potassium Pump do?
pump 2 K+ into axoplasm and 3 Na+ out
1 of 9
Why does a small diameter decrease conduction velocity in unmyelinated cells?
Large surface area to volume ratio causes Ion leakage
2 of 9
What is the purpose of the refractory period?
allow for discrete transmission of action potentials
3 of 9
What is a taxis?
response whose direction is determined by direction of stimulus
4 of 9
What would happen in response to unilateral light
IAA moves to shaded side of shoot
5 of 9
What is the reflex arc?
Sensory-relay-motor-effector
6 of 9
Where are cones found in their highest density
Fovea
7 of 9
What is the root for an action potential in the cardiac cycle?
SAN - AVN - Bundle of His- purkyne fibres
8 of 9
What is the coordinator in the reflex to change heart rate?
Centres to increase and decrease heart rate
9 of 9

Other cards in this set

Card 2

Front

Why does a small diameter decrease conduction velocity in unmyelinated cells?

Back

Large surface area to volume ratio causes Ion leakage

Card 3

Front

What is the purpose of the refractory period?

Back

Preview of the front of card 3

Card 4

Front

What is a taxis?

Back

Preview of the front of card 4

Card 5

Front

What would happen in response to unilateral light

Back

Preview of the front of card 5
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