Coordination and Response

Question 1

Describe the route of the nervous pathway

Answer 1

Stimulus–>Receptor–>Sensory neurone–>CNS->Motor Neurone–>Effector–>Response

Question 2

What are the parts of the Central Nervous System

Answer 2

• ->Brain

- ->Spinal Cord

Question 3

What is required for a coordinated response?

Answer 3

• ->Stimulus
• ->Receptor
• ->Effector

Question 4

What is homeostasis?

Answer 4

• -> The maintenance

- ->of const. int. enviro.

Question 5

Give examples of homeostasis

Answer 5

• ->cont. blood gluc. conc.
• ->cont. body temp.
• ->water lev. in the blood

Question 6

What is a stimulus?

Answer 6

• ->a change in the enviro.

- ->that can be DETECTED

Question 7

What is skin sensitive to?

Answer 7

• ->Pressure
• ->Heat and Cold
• ->Pain

Question 8

What is the tongue sensitive to?

Answer 8

• ->Chemicals

- ->in F and B

Question 9

What is the nose sensitive to?

Answer 9

• ->Chemicals

- ->in AIR

Question 10

What is the ear sensitive to?

Answer 10

• ->Sound

- ->Movement

Question 11

What is the eye sensitive to?

Answer 11

–>Light

Question 12

What is a nerve?

Answer 12

• -> A bundle of

- ->Neurones (nerve cells)

Question 13

What are the 3 types of neurones?

Answer 13

• ->Sensory
• ->Relay
• ->Motor

Question 14

What is the role of sensory neurones?

Answer 14

• -> to carry impulses
• ->From recep.
• ->towards CNS

Question 15

What is the role of relay neurones?

Answer 15

• ->connect the
• ->Sensory neurone
• ->To the mot. neurone

Question 16

Describe the General Structure of a Motor neurone

Answer 16

• ->cell body
• ->Dendrons
• ->Axon
• ->Myelin Sheeth

Question 17

What is the function of the cell body?

Answer 17

–>houses the nuc.

Question 18

What is the function of the axon?

Answer 18

• -> Long fibre
• -> carries imp.
• ->to effect. organ

Question 19

Describe the reflex action

Answer 19

• ->A stimulus is detec. by PAIN RECEP. in skin
• ->Sens. Neurone sends elect. imp. to SC
• ->Elect. imp passed onto the RELAY neurone in SC
• ->RN connects MN
• ->MN carries imp/
• ->Impulse reach. effect.
• ->App. resp.

Question 20

What are the differences between the nervous system and endocrine system

Answer 20

Elect. imp vs chem. hormone
Instant resp.vs much slower resp.
Impulse acts on small areas vs. horm. widespread effects
Short eff.(til nerv imp. stop) vs Long. effect( till horm. brok.

Question 21

Describe the reflex arc

Answer 21

• ->Receptor
• ->Sensory Neurone
• ->Relay neurone
• ->Motor neurone
• ->Effector

Question 22

What are receptors?

Answer 22

–>Sense organs that det. stimuli