Unit 14 - Coordiantion And Response

Question 1

In how many parts is the human nervous system divided?

Answer 1

The human nervous system consist of two parts: Central Nervous System and the Peripheral nervous system

Question 2

What is the Central Nervous System?

Answer 2

The Central Nervous System is the nerves in our brain and our spinal chord

Question 3

What is the peripheral nervous system?

Answer 3

The peripheral nervous system is a network of nerve cells in the rest of the body

Question 4

What are neurones?

Answer 4

Neurones are highly specialised cells

Question 5

What are the three types of neurones in the reflex arc?

Answer 5

Sensory, motor and relay

Question 6

What are the sensory neurones?

Answer 6

The sensory neurones transmit impulses form sense organs to the brain and spinal cord

Question 7

What are the motor neurones?

Answer 7

The motor neurones transmit impulses away from the brain and spinal cord to effector organs

Question 8

What are the relay neurones?

Answer 8

The relay neurones pass on impulses form sensory neurones to motor neurones inside the brain and spinal cord

Question 9

What is a synapse?

Answer 9

A synapse is a junction between two neurones

Question 10

How do drugs affect nerve transmission at synapses?

Answer 10

Many drugs have their effects by interacting with the receptor molecules at synapses

Question 11

What are the sense organs?

Answer 11

Sense organs are groups of receptor cells that respond to specific stimuli

Question 12

The eye structure

Answer 12

Cornea, iris, pupil, lens, retina

Question 13

What happens to the pupil when there is bright light?

Answer 13

The diameter of the pupil decreases

Question 14

What happens to the pupil when the light intensity decreases?

Answer 14

The diameter of the pupil increases

Question 15

What is a hormone?

Answer 15

A hormone is a chemical substance produced by an endocrine gland and transported in the blood

Question 16

When is adrenaline released?

Answer 16

Adrenaline is released during times of excitement, fear or stress

Question 17

What does adrenaline do to your body?

Answer 17

Increases breathing and pulse rate

Widening the pupils so that more light enters the eyes

Question 18

What is homeostasis?

Answer 18

Homeostasis is the maintenance of constant internal conditions, such as body temperature

Question 19

What are the functions of the skin?

Answer 19

Protects the body from damage 
Stop pathogens from entering 
Prevents too much water loss
Detects changes in temperature
Loses heat by conduction

Question 20

What is a gravitropism?

Answer 20

A gravitropism is a growth response to the stimulus of gravity. Shoots are positively phototropic and grow towards the light

Question 21

What is a phototropism?

Answer 21

A phototropism is a growth response to the stimulus of light. Shoots are positively phototropic and grow towards the light