Control and Communication

Question 1

what is the nervous system made up off?

Answer 1

brain, spinal cord, nerves

Question 2

what is the central nervous system made up off?

Answer 2

brain and spinal cord

Question 3

what is the job of the cns?

Answer 3

to sort out information from the senses and send information to the muscles so they make a response

Question 4

what are the 3 parts of thr brain?

Answer 4

cerebrum, cerebellum and medulla

Question 5

what is the function of the cerebrum?

Answer 5

to control thought, memory, emotions, personailty

Question 6

what is the function of the cerebellum?

Answer 6

to control balance and co-ordinatioon

Question 7

what is the function of the medulla?

Answer 7

control automatic responses such as heart rate, breathing, peristalsis

Question 8

what are the sense organs?

Answer 8

ears, tounge, skin

Question 9

what are the cells found in the nervous system called?

Answer 9

neurons

Question 10

what are the three types of neurons?

Answer 10

sensory, inter, motor

Question 11

where do sense organs carry information to and from?

Answer 11

from receptors to the cns

Question 12

where do inter neurons carry information to and from?

Answer 12

from sensory neurons to mototr neurons

Question 12

where do motor neurons transfer information to and from?

Answer 12

from the inter neuron to the muscles

Question 13

whats it called when two neurons meet at a gap?

Answer 13

a gap called a synapse

Question 14

what happens in a reflex action?

Answer 14

sensory neurons detect the stimulous and infromation is passed to the inter neuron. The inter neuron sends the information to the motor neuron and the motor neuron sends the information to the muscles so they contract, avaoiding harm to the body?

Question 15

what are the group of neurons working together in a reflex action called?

Answer 15

the refle arc

Question 16

what is the endocrine system?

Answer 16

its madeup of endocrine glands that produce hormones and release them into the bloodstream

Question 17

what are some differences between hormone messages and nerve messages?

Answer 17

1. hormone messages involve chemicals, whereas nerve messages involve electrical impulses
2. hormone messages are carried in blood, whereas nerve messages are carried along nerves

Question 18

what is homeostasis?

Answer 18

the control of the internal enviroment in the body

Question 19

why is hoemeostasis important?

Answer 19

so that the body cells can function properly

Question 20

what does homeostasis control?

state 2 answers

Answer 20

hoemeostasis controls body temperature, hoemeostasis controls blood glucose concentration

Question 21

what does the pancreas monitor?

Answer 21

blood glucose concentration

Question 22

what do receptor cells in the pancreas detect?

Answer 22

changes in blood glucose concentration

Question 23

whats the normal body temperature?

Answer 23

37 degrees

Question 24

what happens when body temperature falls below 37 degrees?
state 2 answers

Answer 24

the hairs on skin are raised, shivering takes place to bring temperature back to normal, blood vesssels in the skin become narrower

Question 25

what happens if body temperature rises above 37 degrees?
state 2 answers

Answer 25

the hairs on the skin are lowerd, blood vessels in the skin becomes wider, sweating takes place to cool body

Question 26

what does the pancreas monitor?

Answer 26

blood glucose concentration

Question 27

what happens when blood concentration increases

state 2

Answer 27

1. the pancreas realeases the hormone insulin
2. the liver then converts the glucoseto glycogen

Question 28

what happens when blood concentration decreases?

state 2

Answer 28

1. the pancreas releases the hormone glucagon
2. the liver converts glycogen to glucose