Last Minute Study P1

Question 1

Explain the effect if the receptors in the cochlea are damaged

Answer 1

The receptors cannot convert the stimuli into impulses. No impulses are transmitted to the cerebrum and the person does not hear anything

Question 2

Describe how the parts of the middle ear, including the membranes assist with amplifying sounds

Answer 2

Sound vibrations are transmitted from the tympanic membrane to the smallest oval window through the ossicles. This concentrates the vibrations

Question 3

Describe the role of the semi circular canals in maintaining balance

Answer 3

A change in speed/ direction of movement stimulates the cristae. The stimulus is converted to an impulse. The impulse is transmitted to the cerebellum. Cerebellum sends impulses to the muscles to restore balance

Question 4

Describe the importance of a reflex action in the human body

Answer 4

Allows the person to respond involuntarily to a stimulus to prevent damage to the body

Question 5

Importance of the myelin sheath in the functioning of neurons

Answer 5

It acts as an insulator and therefore speed up the nerve impulse

Question 6

Reflex action (6)

Answer 6

The receptor receives the stimulus and converts it into an impulse which is transported by the sensory neuron to the brain. The brain interprets the impulse. The brain send the an impulse to a motor neuron to bring about a response