6.5 IB Synaptic Transmission

What is W?

• Axon Terminal

• Neurotransmitters

• Dendrite

• Synapse

Answer explanation

The dendrites are the receives of the new action potential.

What is Y?

• Axon terminal

• Neurotransmitters

• Dendrite

• Synapse

Answer explanation

The axon terminal is where the action potential ends and is ready to move across the synapse.

Where are neurotransmitters located within in neuron?

• axon terminals

• dendrites

• Schwann cells

• cell body

Answer explanation

Neurotransmitters are found in the vesicles, ready to migrate to the presynaptic membrane.

Calcium ions (Ca²⁺)are responsible for.....

• signaling the release of the neurotransmitter

• signaling Na⁺ to be released into the membrane

• signaling the release of K⁺ out of the membrane

• serving as the neurotransmitter

Answer explanation

The in-flood of Ca²⁺ ions sets of the chain of events, without the Ca²⁺ ions the action potential will 'die'.

These are chemical substances that breaks down a neurotransmitter so that the post synaptic neuron can depolarize in order to fire again...

• Enzymes

• Ions

• Lipids

• Binding agents

Answer explanation

If the neurotransmitter is not broken down then it all sorts of problems can occur.

The actual gap in the synapse is called the...

• synaptic bridge

• synaptic vesicle

• synaptic membrane

• synaptic cleft

Location at which a neuron can transfer an impulse to another cell with the use of neurotransmitters is called ...

• myelin sheath

• axon

• threshold

• synapse

Neurotransmitters are released from the....

• Dendrites

• Post-synaptic neuron

• Presynaptic neuron

• Axon

Which is the correct sequence in the transmission of a neural impulse?

• axon, dendrite, cell body, synapse, axon terminal

• dendrite, axon, axon terminal, cell body, synapse

• synapse, axon terminal, axon, dendrite, cell body

• dendrite, cell body, axon, axon terminal, synapse

This releases neurotransmitters which are sent into the synaptic cleft for receptors on the dendrite to respond to...

• axon

• axon terminal

• gene

• neuron