MEDIUM
AS and A Level
IMPORTANT
Earn 100
Look in the given figure and explain what is meant by the all-or-none law.
Important Questions on Control and Coordination
MEDIUM
AS and A Level
IMPORTANT
Describe the relationship between the strength of the stimulus and the size of the receptor potential that is generated.
MEDIUM
AS and A Level
IMPORTANT
Describe the relationship between the strength of the stimulus applied and the frequency of action potentials generated in the sensory neurone.
HARD
AS and A Level
IMPORTANT
What determines the maximum frequency of action potentials in a neurone?
HARD
AS and A Level
IMPORTANT
Threshold potentials in receptor cells can increase and decrease. Suggest the likely advantages of this.
MEDIUM
AS and A Level
IMPORTANT
Name the process by which vesicles release their contents at the presynaptic membrane.
EASY
AS and A Level
IMPORTANT
Describe the role of acetylcholinesterase.
MEDIUM
AS and A Level
IMPORTANT
Suggest why impulses travel in only one direction at synapses.
HARD
AS and A Level
IMPORTANT
Suggest why if action potentials arrive repeatedly at a synapse, the synapse eventually becomes unable to transmit the impulse to the next neurone.
