Human Response to the Environment

Question 1

CNS consists of

Answer 1

Brain and spinal cord

Question 2

PNS consists of

Answer 2

Network of nerves

Question 3

Controls all involuntary actions

Answer 3

Autonomic nervous system

Question 4

Describe the sympathetic system

Answer 4

Brings about action and stimulates parts of the body

Question 5

Describe the parasympathetic system

Answer 5

Slows down parts of the body

Question 6

3 types of neurons

Answer 6

Motor neuron

Sensory neuron

Interneuron

Question 7

Function of a sensory neuron

Answer 7

Conducts nerve impulses from the receptor towards the spinal cord and brain

Question 8

Function of motor neuron

Answer 8

conducts nerve impulses away from the brain and spinal cord towards the effector

Question 9

Describe a synapse

Answer 9

A microscopic gap between the end of an axon of one neuron and the dendrite of another neuron

Question 10

Part of the brain that controls temperature

Answer 10

Hypothalamus

Question 11

Part of the brain that joins the 2 hemispheres

Answer 11

Corpus Callosum

Question 12

Part of the brain that controls involuntary muscle movements

Answer 12

Medulla Oblongata

Question 13

Part of the Brain that controls voluntary muscle movements

Answer 13

Cerebrum

Question 14

Part of the brain that regulates posture and balance

Answer 14

Cerebellum

Question 15

Reflex Arc

Answer 15

The path taken by an impulse in response to a stimulus

Question 16

Cones are responsible for…..

Answer 16

Colour vision and only function in bright light conditions

Question 17

Rods are responsible for…..

Answer 17

Black and white vision and the perception of movement

Question 18

Area of clearest vision

Answer 18

Yellow spot

Question 19

Function of conjunctiva

Answer 19

Thin transparent membrane that protects the eye

Question 20

Describe the refraction of light rays by the cornea and the lens

Answer 20

Light rays enter the eye passing through the cornea, aqueous humour, pupil, lens, the vitreous humour and fall on the retina. The cornea refracts the most light rays and the lens refracts and focuses light sharply onto the retina