WorksheetsWednesday 6.5 Quizizz
Total questions: 8
Worksheet time: 8mins
The graph shows an action potential. What is the threshold potential for this cell?
–80 mV
–70 mV
–55 mV
40 mV
The diagram shows a graph of an action potential. What is happening at X?
Sodium channels close.
Calcium channels open.
Sodium channels open.
Potassium channels close.
The diagram shows a motor neuron. What are the biochemical nature and function of the myelin sheath?
The myelin sheath is mainly protein which allows growth of the axon.
The myelin sheath is mainly protein which acts as membrane carriers.
The myelin sheath is mainly lipid which allows saltatory conduction.
The myelin sheath is mainly lipid which provides an energy source.
The image shows a neuron. Which letter shows the myelin sheath?
A
B
C
D
How does potassium move across the membrane of a neuron during repolarization?
Simple diffusion
Facilitated diffusion
Endocytosis
Active transport
Which structure in the motor neuron is required for saltatory conduction?
The cell wall
The myelin sheath
The axon
The Dendrites
The diagram below shows part of the membrane of a neuron. What stage of the action potential does it depict?
Depolarization
Repolarization
Resting potential
Hyperpolarization
If schizophrenia is caused by an overabundance of the neurotransmitters dopamine and serotonin in the synapses of some areas of the brain, which drug action could work in treating the symptoms?
Release of cholinesterase into the synaptic cleft
Increased re-uptake of dopamine and serotonin by presynaptic neurons
Increased permeability of the presynaptic neuron to sodium
Blockage of dopamine and serotonin receptors on presynaptic neurons
