Nervous system

Question 1

What signal travels in pulse along nerve cells?

Answer 1

Electrochemical signal

Question 2

What does the electrochemical signal called?

Answer 2

Nerve impulses/ action potential

Question 3

Duration of nerve impulses

Answer 3

short-lived

Question 4

List the type of nerves in corresponding order

Answer 4

sensory neuron
interneuron
motor neuron

Question 5

What does sensory neuron do?

Answer 5

Sensory neurons detect signals from the stimulus and sensory receptor which trigger nerve impulse, then carry the information to the central nervous system

Question 6

What do interneurons do and where are they located in?

Answer 6

Interneurons are located in CNS. They receive the signal from sensory neurons and convey them to motor neurons

Question 7

What does motor neurons do?

Answer 7

Motor neurons receive signals from interneurons and carry signal from the CNS to the effectors

Question 8

The nervous system includes the Central Nervous System comprising the?

Answer 8

The brain and spinal cord

Question 9

The nervous system is composed of which 2 systems?

Answer 9

Central Nervous system (CNS)
Peripheral Nervous System (PNS)

Question 10

The Peripheral Nervous System consisting?

Answer 10

Consist of he nerves outside the CNS

Question 11

Within the PNS, what system is there that are voluntary nervous system?

Answer 11

Somatic Nervous System (SNS)

Question 12

What does Autonomic Nervous system (ANS) do?

Answer 12

regulate all the automatic function, such as breathing and heart rate

Question 13

What is excitatory and inhibitory?

Answer 13

They are neurotransmitters

Question 14

Which neurotransmitters stimulate the next neuron in the pathway?

Answer 14

excitatory

Question 15

which neurotransmitters block the nerve impulse from continuing?

Answer 15

inhibitory

Question 16

give one example of excitatory

Answer 16

dopamine

Question 17

give one example of inhibitory

Answer 17

glycine

Question 18

what is a stimulus?

Answer 18

Stimulus detected by a sensory receptor and the receptor conveys the message through to the CNS through a sensory neuron.

The interneurons in the CNS trigger a response by activating an effector by sending nerve impulses along a motor neuron.

The effector removes the stimulus that negates the stimulus.

Question 19

what is the benefit of reflex response?

Answer 19

fast. it provides a rapid response to a stimulus

Question 20

Give example of reflex response

Answer 20

knee jerk
pupil contraction
muscle contraction

Question 21

How are synapses formed? (what part binds with what part of the neuron)

Answer 21

the axon from another neuron binds with the dendrite from another neuron

Question 22

what is neurotransmitter?

Answer 22

it is a chemical messager released at a synapse. the release is stimulated by electrcical signal.

It releases from one axon terminal through exocytosis and diffuse across the space where they bind to the receptor on the receiving membrane.

This activates the ion channel which trigger an electrical impulse in the next neuron.

Neurotransmitters broken down and de-activated by enzyme

Question 23

Is the presynaptic cell in the axon or dendrite?

Answer 23

axon

Question 24

Is the postsynaptic cell in the axon or dendrite?

Answer 24

dendrite

Question 25

Describe where is the neurotransmitter and the synapse placed.

Answer 25

Neurotransmitter - in the synapse between the axon and dendrite.

Synapse - it is a gap for neurotransmitters to move across from axon to dendrite and bind to the receptor.