Nervous System

Question 1

Describe how impulses are transmitted across the synapse?

Question 2

How does the structure of a synapse ensure that the impulse travels in one direction?

Question 3

Effects of heroin on the function of synapse?

Question 4

S

Question 5

Difference between voluntary and involuntary action?

Answer 5

Involuntary are automatic. No conscious control.
Rapid
Response specific to stimulus
Protective/ linked to survival.
Innate

Question 6

Define sensitivity?

Answer 6

Ability to detect stimulus( changes in environment) and to respond to them.

Question 7

Define involuntary action?

Answer 7

Reaction or response to a stimulus that does not require a conscious action and are rapid.

Question 8

Outline a reflex arc?

Answer 8

Stimulus detected by receptor cells
Impulses travel along the sensory neurone to the spinal cord.
Travels across synapse
Transmitted to relay
Transmitted to mother neurone
Motor neurone to muscle
Muscle contracts.

Question 9

Advantages of a simple reflex?

Answer 9

Fast
Automatic
Protective/ prevents injuries
Removes parts of the body from danger

Question 10

Characteristics of a reflex action?

Answer 10

Involuntary
Rapid
Protective
Present since after birth

Question 11

Importance of checking body reflexes after birth?

Answer 11

See development of nervous system
Check for impairments