# 1pilihan
What happens during depolarization in an axon?
Na+ ions leave the axon
K+ ions enter the axon
Na+ ions enter the axon
K+ ions leave the axon
Nervous system(copy)
MASPAITILLA MA
Perlawanan berpasukan
Universiti
Sains
Nervous system(copy)
26
Universiti
Sains
Nervous system(copy)
26
Kuiz dicipta dengan peta premium
20 soalan
Allow incorrect answer
Sembunyikan jawapan
public kuiz
# 2pilihan
How is a nerve impulse transmitted across a synapse?
Mechanically
Electrically
Chemically
Optically
# 3pilihan
What is the role of the sodium-potassium pump in maintaining resting potential?
Pumps 3 Na+ out and 2 K+ in
Pumps 2 Na+ out and 3 K+ in
Pumps 3 K+ out and 2 Na+ in
Pumps 2 K+ out and 3 Na+ in
# 4pilihan
What happens during the depolarization phase of an action potential?
K+ channels open
Na+ channels close
Na+ channels open
Action potential peaks
# 5pilihan
Which component of a neuron is responsible for conducting impulses away from the cell body?
Dendrites
Axon
Cell body
Synaptic knob
# 6pilihan
What is the primary function of the synaptic vesicles in a neuron?
Store calcium ions
Store neurotransmitter molecules
Transmit electrical signals
Protect the neuron
# 7pilihan
What is the role of the myelin sheath in nerve impulse conduction?
To slow down nerve impulse transmission
To prevent ion exchange across the axon membrane
To act as an electrical insulator and speed up transmission
To store neurotransmitters
# 8pilihan
What is the function of neurotransmitters in a synapse?
To generate electrical impulses
To transmit chemical signals across the synaptic cleft
To break down acetylcholine
To bind to intracellular receptors
# 9pilihan
How does cocaine affect dopamine synapses in the brain?
It increases dopamine reabsorption
It blocks dopamine receptors
It prevents the release of dopamine
It blocks reabsorption of dopamine, increasing its levels in the synapse
# 10pilihan
What characterizes the refractory period in neurons?
The period when the neuron is hyperactive
The period when the neuron is more sensitive to stimuli
The period when the neuron is insensitive to new stimuli
The period when the neuron is depolarizing
# 11pilihan
Which part of the nervous system is responsible for 'fight or flight' responses?
Somatic Nervous System
Parasympathetic Nervous System
Sympathetic Nervous System
Central Nervous System
# 12pilihan
What is the resting potential of a neuron?
The membrane potential when a neuron is not transmitting an impulse
The membrane potential when a neuron is transmitting an impulse
The potential energy stored in a neuron
The electrical charge of a neuron at peak action potential
# 13pilihan
During which phase of the action potential do voltage-gated sodium channels open?
Resting state
Depolarization
Repolarization
Hyperpolarization
# 14pilihan
What role does calcium play at the synapse?
It depolarizes the postsynaptic membrane
It triggers the release of neurotransmitters
It inhibits the action potential
It acts as a secondary messenger
# 15pilihan
During resting potential, what is the state inside the axon?
More positive
More negative
Neutral
Equal to outside
# 16pilihan
What triggers the opening of voltage-gated sodium channels during depolarization?
Low potassium levels
High calcium influx
Presence of a stimulus
Release of neurotransmitters
# 17pilihan
In which phase of action potential do voltage-gated potassium channels open?
Resting phase
Depolarization
Rising phase
Falling phase
# 18pilihan
What is the primary role of the sodium-potassium pump in neurons?
To depolarize the neuron
To maintain resting potential by pumping sodium out and potassium in
To facilitate neurotransmitter release
To conduct action potentials
# 19pilihan
What structure is responsible for releasing neurotransmitters into the synaptic cleft?
Axon terminal
Dendrite
Node of Ranvier
Myelin sheath
# 20pilihan
What is the difference in charge across the axon membrane during resting potential?
Positive inside, negative outside
Negative inside, positive outside
Neutral inside and outside
Positive inside and outside
Google Classroom Share
Akses disekat kerana pelan tamat. Salin dan edit pada peta lain.