7.2 B

Question 1

What is the stimulus-response model

Answer 1

The stimulus-response model shows the pathway which information is transmitted in the nervous system

Question 2

Receptor

Answer 2

Receptorsare special organs or cells able to respond to light, heat, or other external stimuli and transmit a signal to a sensory neuron

Question 3

Chemoreceptor

Answer 3

sensitive to chemicals, such as odour molecules in the air. located in the nose and tongue.

Question 4

Mechanoreceptor

Answer 4

sensitive to touch, pressure, sound and motion.
located in the skin, the inner ear and muscles.

Question 5

Pain receptor

Answer 5

sensitive to chemical changes in damaged cells
located throughout the body, but mostly the skin.

Question 6

Thermoreceptor

Answer 6

sensitive to temperature changes located in the skin.

Question 7

Photoreceptor

Answer 7

sensitive to light and located in the eyes.

Question 8

what is the order of the stimulus response model

Answer 8

Stimulus, Receptor, sensory neuron, control center, motor neuron, effector,, responce

Question 9

Voluntary actions

Answer 9

Normally, movement of arms and legs is voluntary.
The control center is the brain

Question 10

Involuntary actions

Answer 10

However, in dangerous situations e.g. touching something hot or sharp, we often have a rapid and involuntary response
The stimulus response model takes a ‘short-cut’ through the spinal cord to allow for instant action
The brain is informed later
This is known as a reflex arc