Nervous System

Question 1

Which neurons:

a) send messages to the CNS
b) send messages from the CNS
c) connect the other two in the CNS

Answer 1

a) sensory neurons
b) motor neurons
c) relay neurons

Question 2

Give the order in which reactions take place with examples

Answer 2

Stimulus (increased light)
Receptors (light receptors in the eyes)
CNS (brain)
Effector (muscle controlling pupils)
Response (pupils decrease in size)

Question 3

What is a stimulus?

Answer 3

A change in your environment which you need to react to

Question 4

Fill the blanks:
A reflex is ____ because it does not travel straight to the _____, instead to the ______ _____. A reflex is _________ and ___________. They need to have these qualities because the _______ us from ______

Answer 4

Fast
Brain
Spinal chord
Automatic
Involuntary
Protect
Danger

Question 5

A synapse is a junction between two nerve cells. True or false?

Answer 5

True

Question 6

Fill the blanks:
In a synapse - an _______/ signal arrives at one end of one neuron. This triggers the release of _____ ____________ into the synapse. These _______ across the synapse. Then they bind with their corresponding _________ on the other neuron. This triggers and allows the signal to ________.

Answer 6

Impulse
Neuro transmitters
Diffuse
Receptors
Continue

Question 7

Diffusion travels from a high concentration to a low concentration. True or false?

Answer 7

True