b10: the human nervous system

Question 1

what is the function of the human nervous system

Answer 1

it enables human organisms to react to their surroundings and coordinate behavior

Question 2

what are the 2 parts of the central nervous system

Answer 2

brain
spinal cord

Question 3

why are reflex actions described as rapid and automatic

Answer 3

they do not involve the conscious part of the brain

Question 4

why are reflex actions important

Answer 4

for the survival to prevent damage to the body

Question 5

give the pathway of a nervous response

Answer 5

stimulus -> receptor -> coordinator -> effector -> response

Question 6

give the function of the cerebral cortex

Answer 6

outer layer of the brain playing an important role in consciousness

Question 7

give the function of the medulla oblongata

Answer 7

part of the brain above the spinal cord that controls breathing and heart rate

Question 8

give the function of the cerebellum

Answer 8

part of the back of the brain involved in coordinating muscle activity

Question 9

why is it difficult to treat brain disorders

Answer 9

brain is very complex and delicate

Question 10

what is a synapse

Answer 10

gap between 2 neurons, allowing impulses to cross

Question 11

what is the function of neurons

Answer 11

carry electrical impulses around the body

Question 12

what is accommodation

Answer 12

process of changing the shape of the lens to focus on near/distant objects

Question 13

give 2 common defects of the eyes

Answer 13

myopia (short-sightedness)
hyperopia (long-sightedness)

Question 14

how can eye defects be treated

Answer 14

spectacle lenses
contact lenses
laser surgery
replacement lenses in eyes