Yr10 Biology - the nervoud system

Question 1

What does the cerebellum do?

Answer 1

Has functions involving coordination, accurate timing and precision. does not initiate movement

Question 2

what does the cerebral cortex do?

Answer 2

MILC- memory , intelligence, language, conciousness

Question 2

what does the medulla do?

Answer 2

unconcious behaviour such as vomiting, heart beat, breathing and blood pressure

Question 3

what does the hypothalamus do?

Answer 3

linking the nervous system to the hormonal system via the pituitary gland. involved with instinctive behaviours and monitors blood temp

Question 4

which part of the brain has functions involving coordination, accurate timing and precision?

Answer 4

cerebellum

Question 5

which part of the brain is invovled with memory, intelligence, language and conciousness? (milc)

Answer 5

cerebral cortex

Question 6

which part of the brain is involved with unconcious behaviors such as heart rate, breathing, blood pressure and vomiting?

Answer 6

medulla

Question 7

which part of the brain is involved in linking the nervous system to the hormonal system?

Answer 7

the hypothalamus

Question 8

what are the two sets of muscles in the iris?

Answer 8

circular and radial muscles

Question 9

ligaments are not muscles, so to describe their movements which words should you use?

Answer 9

tighten/slacken

Question 10

what parts of the eye are involved in adjusting how near or far you are looking?

Answer 10

the suspensory ligament and ciliary muscle

Question 11

what is the name of the ligament which is antagonistic to the ciliary muscle?

Answer 11

the suspensory ligament

Question 12

what is the name of the muscle which is antagonistic to the suspensory ligament?

Answer 12

the ciliary muscle

Question 13

what is the difference between the responses in the endocrine and nervous system?

Answer 13

endocrine- slower, acts longer (hormones)
nervous system- rapid, precise (electrical impulse)

Question 14

what is the difference between the action in the endocrine and nervous system?

Answer 14

nervous system- carried to specific locations, eg, muscles
endocrine system- carried in blood to all of the body but only affects the target organ

Question 15

what is a synapse?

Answer 15

a microscopic gap between neurones

Question 16

how does the electrical message pass from one neurone to another?

Answer 16

when one impulse reaches the end of the neurone it causes neurotransmitters to be released from vesicles into the synaptic cleft. It diffuses, moving from high conc. to low conc. across the synapse. when they reach the other side, they bind to repectors on the membrane of the second neurone, which causes an impulse to start in the next neurone

Question 17

what is myopia?

Answer 17

a condition where you can see closeby objects but not faraway objects

Question 18

what is hyperopia?

Answer 18

a condition where you can see faraway objects but not closeby objects

Question 19

what causes myopia?

Answer 19

an elongated eyeball or a slightly curved cornea

Question 20

what causes hyperopia?

Answer 20

the cornea not being curved enough, the eyeball being too short, or loss of elasticity in the lens-it can’t be thick enough to focus (the last is often age related)

Question 21

how do you correct hyperopia?

Answer 21

with a convex lens

Question 22

how do you correct myopia?

Answer 22

with a concave lens

Question 23

what do the ciliary muscle and suspensory ligament do when you want to see objects far away

Answer 23

ciliary muscle relaxes and the suspensory ligament tightens

Question 24

what do the ciliary muscle and suspensory ligament do when you want to see objects close by

Answer 24

ciliary muscle contracts and the suspensory ligament slackens

Question 25

what is the difference in muscle tension in the eye when you are looking at near/far objects?

Answer 25

near-increase
far-decrease

Question 26

what shape is the lens when you are looking at faraway objects?

Answer 26

thinner, flatter shape

Question 27

what shape is the lens when you are looking at nearby objects?

Answer 27

rounded shape, thicker