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
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
3
Q
3.6.1.3
A
Electrical control of heart rate by autonomic nervous system
Medulla
4
Q
3.6.2.1
A
Structure of a neurone
Resting potential
Action potential - all or nothing principle
Refractory period
5
Q
3.6.2.2
A
Synapses between neurones/ neuromuscular junction - structure
Acetyl choline