synaptic trnasmisioons

Question 1

A The pre-synaptic terminal is the part

Answer 1

A The pre-synaptic terminal is the part of the axon terminal where a neuron forms a synapse with a second neuron.

Question 2

The post-synaptic terminal is the part of

Answer 2

The post-synaptic terminal is the part of the dendrite where the second neuron forms a synapse with the first neuron.

Question 3

describe the structure of the synapse

Answer 3

We’ve now looked at the structure of the synapse. The part where the nerve impulse first arrives is called the , and the membrane around it is called the
pre synaptic membrane
pre synaptic terminal . The bit on the other side is the
post synaptic terminal , and the membrane around it is the post synaptic membrane

Question 4

The little round bags in the pre-synaptic terminal are called

Answer 4

The little round bags in the pre-synaptic terminal are called synaptic vesicles.

Question 5

The synaptic vesicles are filled with chemicals called

Answer 5

The synaptic vesicles are filled with chemicals called neurotransmitters

Question 6

Step 1 in synaptic transmission is

Answer 6

C The nerve impulse arrives at the pre-synaptic terminal, causing the synaptic vesicles to travel down to the pre-synaptic membrane

Question 7

The chemicals within the synaptic vesicle are called

Answer 7

neurotransmitters

Question 8

first 4 steps

Answer 8

D: Nerve impulse arrives at the pre-synaptic terminal.
Synaptic vesicles travel down to the pre-synaptic membrane.
Synaptic vesicle and pre-synaptic membrane fuse.
Neurotransmitters get released into the synaptic cleft.

Question 9

Fill in the missing words to complete the following sentences about the steps involved in synaptic transmission:

First the nerve impulse arrives at the , causing the to travel down to the pre-synaptic membrane. Next, the pre-synaptic membrane and fuse. This causes to be released into the .

Answer 9

First the nerve impulse arrives at the pre synaptic terminal , causing the
synaptic vesicles to travel down to the pre-synaptic membrane. Next, the pre-synaptic membrane and synaptic vesicles fuse. This causes
neurotransmitter to be released into the
synaptic cleft .

Question 10

Once the neurotransmitters are released from the pre-synaptic membrane, they

Answer 10

Once the neurotransmitters are released from the pre-synaptic membrane, they diffuse across the synaptic cleft to the post-synaptic membrane, where they bind to .receptors

Question 11

The steps in neurotransmission so far are… up until viral in the post synaptic terminal

Answer 11

First the nerve impulse arrives at the pre-synaptic terminal , causing the synaptic vesicles to travel down to the pre-synaptic membrane .

Next, the pre-synaptic membrane and synaptic vesicle fuse.

This causes the neurotransmitters or neurotransmitter to be released into the synaptic cleft.

Then, the neurotransmitters or neurotransmitter diffuse across the synaptic cleft, towards the post-synaptic terminal .

Question 12

When positively charged particles flow into the post-synaptic neuron, they cause…

Answer 12

B a small positive change in voltage.

Question 13

The more neurotransmitters that bind to receptors, the more positively charged particles can flow into post-synaptic terminal on dendrites, and so the

Answer 13

The more neurotransmitters that bind to receptors, the more positively charged particles can flow into post-synaptic terminal on dendrites, and so the bigger or larger or greater the change in voltage.

Question 14

If the change in voltage is big enough, then a $_{———-}$−−−−−−−−−−​​ is triggered in the cell body.

Answer 14

Nerve impulse, action potential.

Question 15

Once neurotransmitters are released into the synaptic cleft, what happens next?

Answer 15

The neurotransmitters diffuse across the synaptic cleft and bind to post-synaptic receptors, causing a change in voltage in the post-synaptic neuron.

Question 16

The more neurotransmitters are released by the pre-synaptic neuron…

Answer 16

A the more neurotransmitters will bind to receptors
B the bigger the change in voltage
C the more likely a nerve impulse is triggered
D the more positively charged particles will enter the neuron

Question 17

The more positively charged particles flow into the post-synaptic terminal…

Answer 17

the more likely it is that a nerve impulse is generated at the cell body

Question 18

exam practice

Question 2a. What is the first step of synaptic transmission?
Question 2b. What is the second step of synaptic transmission?

Answer 18

First the nerve impulse in the pre-synaptic neuron triggers movement of vesicles, containing neurotransmitters. Then the vesicles bind with the membrane of the neuron, to release the neurotransmitters into the synaptic cleft.

First the nerve impulse in the pre-synaptic neuron triggers movement of vesicles, containing neurotransmitters. Then the vesicles bind with the membrane of the neuron, to release the neurotransmitters into the synaptic cleft.

Question 19

Once neurotransmitters have diffused across the synaptic cleft, what happens when they bind to the receptors in the post-synaptic terminal? Please select all correct responses.

Answer 19

C Positively charged particles are needed to create a nerve impulse.
A The process of the neurotransmitters binding to the post-synaptic terminal allows for charged particles to enter the post-synaptic neuron.

Question 20

After the neurotransmitter binds to the receptor, and positively charged particles have flowed into the post-synaptic membrane, the neurotransmitter is released back out into the…

Answer 20

synaptic cleft

Question 21

Proteins are…

Answer 21

A molecules produced by genes.
C molecules that keep our bodies alive and functioning properly.

Question 22

Which of the following statements are correct? about re uptake

Answer 22

E The pre-synaptic terminal re-uptakes neurotransmitters.
B Re-uptake is the process of removing neurotransmitters from the synaptic cleft.

Question 23

The structures that suck up the neurotransmitters into the pre-synaptic terminal are called …

Answer 23

Re-uptake proteins.

Question 24

Identify the correct order of the following steps of synaptic transmission by ordering them from 1 to 5.

Neurotransmitters are released into the synaptic cleft and are removed through the process of re-uptake. Step:

Neurotransmitters diffuse across the synaptic cleft towards the post-synaptic terminal. Step:

Synaptic vesicle and pre-synaptic membrane fuse, causing neurotransmitters to be released into the synaptic cleft. Step:

The nerve impulse arrives at the pre-synaptic terminal, causing synaptic vesicles to travel to the pre-synaptic membrane. Step:

Neurotransmitters bind to receptors on the post-synaptic terminal, allowing particles to flow into it. Step:

Answer 24

5

3

2

1

4