Synapse

What is the role of calcium ions during a synaptic transmission?

• Generate action potential

• Speed up the impulse transmission

• Depolarisation of the synaptic knob

• trigger the vesicles to move and fuse with the presynaptic membrane

X is .....

• Na⁺

• Ca²⁺

• neurotransmitter

• K⁺

Tags

NGSS.HS-PS2-5

Which of the following is NOT TRUE about the synapse?

• At the synapse, neurotransmitters are released at the postsynaptic membrane.

• At the synapse, chemical signals are converted into electrical signals.

• Small gap between neuron is called synaptic cleft

• Neurotransmitter binds to ligand-gated ion channel on post-synaptic membrane

Which of the following is the event that happen at Q?

• Synaptic vesicle carrying acetylcholine fuses with the presynaptic membrane and releases the acetylcholine into the synaptic cleft.

• Acetylcholine molecules diffuse across the synaptic cleft

• Acetylcholine binds to the receptors on the presynaptic membrane.

• Acetylcholine is resynthesized

Stucture that contain neurotransmitter is....

• B

• A

• D

• E

Name an organelle which can be found in structure A.

• vesicle

• mitochondrion

• nucleus

• receptor

Neurotransmitters are released from the

• Dendrites

• Post-synaptic neuron

• Presynaptic neuron

• Schwann Cells

What is the chemical used by a neuron to transmit an impulse across a synapse to another nerve cell?

• Neurotransmitters

• Synapse

• Threshold

• Impulse

What chemical is activated by the action potential in the presynaptic neuron that causes the vesicles containing neurotranmitters to move toward the synaptic cleft?

• calcium

• potassium

• sodium

• phosphorus

Neurotransmitters are released from presynaptic membrane to synaptic cleft by process of

• Osmosis

• Diffusion

• Active transport

• Exocytosis