2.2 Control And Communication

Question 1

What is the nervous system comprised of?

Answer 1

The CNS and other nerves.

Question 2

What does the central nervous system (CNS) consist of?

Answer 2

The brain and the spinal chord.

Question 3

What does the brain contain?

Answer 3

The cerebrum, cerebellum and medulla.

Question 4

Label the cerebrum, cerebellum and medulla on a diagram.

Answer 4

Check answer

Question 5

What does the cerebrum control?

Answer 5

Conscious thought, intelligence, language

Question 6

What does the cerebellum control?

Answer 6

Balance and co-ordination

Question 7

What does the medulla control?

Answer 7

Unconscious control of body temp, heart and breathing rate, etc.

Question 8

What are the 3 neuron types?

Answer 8

Sensory, inter and motor.

Question 9

What do receptors do? (detect ….)

Answer 9

Detect stimuli / sensory information.

Question 10

What do electrical impulses do?

Answer 10

Carry messages along neurons.

Question 11

What do synapses do?

Answer 11

Transfer messages between neurons by chemical messengers.

Question 12

What are reflex actions?

Answer 12

Involuntary protective movements.

Question 13

What is the reflex arc pathway?

Answer 13

Receptor - sensory neuron - inter neuron - motor neuron - muscle

Question 14

What do endocrine glands do?

Answer 14

Release hormones into the bloodstream.

Question 15

What are hormones?

Answer 15

Chemical messengers which carry messages to target tissues.

Question 16

What is unique about the cells of target tissues?

Answer 16

They have complementary receptors for a specific hormone.

Question 17

What needs to happen to blood glucose levels?

Answer 17

They need to be controlled within safe limits (not too high and not too low).

Question 18

When is insulin released?

Answer 18

The blood sugar rises above normal.

Question 19

What does insulin cause?

Answer 19

Liver and muscle cells to remove glucose from the blood.

Question 20

When is glucagon released?

Answer 20

The blood sugar falls lower than normal.

Question 21

What does glucagon cause?

Answer 21

Lover and muscle cells to release glucose into the blood.

Question 22

What is the pancreas?

Answer 22

The endocrine gland which produces insulin and glucagon.