Neurons and Neural Transmission
Psychology ⇒ Biological Bases of Behavior
Neurons and Neural Transmission starts at 10 and continues till grade 12.
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A student is studying the effects of a drug that blocks the reuptake of dopamine in the brain. What effect is this drug likely to have on dopamine levels in the synaptic cleft?
Describe the all-or-none principle in neural transmission.
Describe the difference between excitatory and inhibitory postsynaptic potentials (EPSPs and IPSPs).
Describe the process of synaptic transmission in your own words.
Explain how neurotransmitters are removed from the synaptic cleft after transmission.
Explain the role of the sodium-potassium pump in maintaining the resting potential of a neuron.
Explain why action potentials do not decrease in strength as they travel along the axon.
A student is studying the effects of a drug that blocks the reuptake of dopamine in the brain. What effect is this drug likely to have on dopamine levels in the synaptic cleft?
Which ion primarily enters the neuron during depolarization? (1) Sodium (Na⁺) (2) Potassium (K⁺) (3) Calcium (Ca²⁺) (4) Chloride (Cl⁻)
Which neurotransmitter is most closely associated with mood regulation and is often linked to depression? (1) Dopamine (2) Serotonin (3) GABA (4) Glutamate
Which neurotransmitter is most closely associated with muscle contraction? (1) Dopamine (2) Serotonin (3) Acetylcholine (4) GABA
Which of the following best describes saltatory conduction? (1) Continuous movement of action potentials along unmyelinated axons (2) Jumping of action potentials from one node of Ranvier to the next (3) Release of neurotransmitters into the synaptic cleft (4) Inhibition of neural transmission
Fill in the blank: The _______ are gaps in the myelin sheath where action potentials are regenerated.
Fill in the blank: The _______ is the fatty substance that surrounds and insulates some axons.
Fill in the blank: The _______ is the junction between the axon terminal of one neuron and the dendrite of another.
Fill in the blank: The _______ is the part of the neuron that contains the nucleus and most of the cell’s organelles.
True or False: Action potentials can travel in both directions along the axon.
True or False: All neurons have the same shape and size.
True or False: Inhibitory neurotransmitters increase the likelihood that the postsynaptic neuron will fire an action potential.
True or False: Neurotransmitters are always excitatory.
