Year 2 spec topic 6 - Organisms respond to changes in their internal and external environments Flashcards

1
Q

3.6.1.1

A

Organisms increase their chance of survival by responding to
changes in their environment
Taxes + kinesis
Plant hormones- IAA
Reflex arc

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2
Q

3.6.1.2

A

Receptors
ONLY RESPOND TO SPECIFIC STIMULI
-Pacinian corpuscle in skin - generator potential
-Rods and cones in eye retina - visual acuity, colour vision, light sensitivity

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3
Q

3.6.1.3

A

Electrical control of heart rate by autonomic nervous system
Medulla

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4
Q

3.6.2.1

A

Structure of a neurone
Resting potential
Action potential - all or nothing principle
Refractory period

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5
Q

3.6.2.2

A

Synapses between neurones/ neuromuscular junction - structure
Acetyl choline

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