B10 - Nervous System

Question 1

two parts of the central nervous system

Answer 1

brain and spinal chord

Question 1

function of the nervous system

Answer 1

enables organisms to react to their surroundings and coordinates behaviour

Question 2

why are reflex actions described as rapid and automatic

Answer 2

they do not involve the conscious part of the brain

Question 3

why are reflex actions important

Answer 3

for survival and to prevent damage to the body

Question 4

function of cerebral cortex

Answer 4

outer layer of the brain playing important role in consciousness

Question 5

function of medulla

Answer 5

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

Question 6

function of cerebellum

Answer 6

part at the back of the brain that is involved in coordinating muscle activity

Question 7

why is it difficult to treat brain disorders

Answer 7

brain is very complex and delicate

Question 8

what is a synapse

Answer 8

gaps between two neurons allowing neurotransmitters across which allows for the continuation of the flow of electrons

Question 9

function of neurones

Answer 9

carry electrical impulses around the body

Question 10

accommodation

Answer 10

process of changing shape of lens to focus on near or distant objects - rounded to focus on near objects and flat to focus on far objects

Question 11

two common defects of the eye

Answer 11

myopia - shortsightedness
hyperopia - longsightedness

Question 12

how can eye defects be treated

Answer 12

spectacle lenses
contact lenses
laser eye surgery
replacement lenses