controll and communication

Question 1

name the three parts of the nervous system

Answer 1

brain, spinal cord and nerves

Question 2

what does CNS stand for

Answer 2

central nervous system

Question 3

name the two components of the CNS

Answer 3

brain and spinal cord

Question 4

why is an internal communication system needed in a multicellular organism

Answer 4

so that our organs can work independently and to co-ordinate internal activities

Question 5

state the three parts of the brain

Answer 5

cerebrum, cerebellum and medulla

Question 6

what does the cerebrum do

Answer 6

it controls conscious thought, reasoning, memory and intelligence

Question 7

what does the cerebellum do

Answer 7

controls muscular coordinations and balance

Question 8

what does the medulla do

Answer 8

controls heart rate and breathing

Question 9

state the 3 types of neurons

Answer 9

sensory, inter,motor

Question 10

name the 5 sense organs and its stimulus

Answer 10

-ear-sound
-mouth-taste
-eye-light
-nose-scent
-skin-touch

Question 11

where would u find receptors

Answer 11

in the sense organs

Question 12

after the stimulus Is detected in the sense organs what happens

Answer 12

1. stimulus is detected by receptors
   2.electrical impulses carry messages along neuron’s to the CNS
   3.the CNS process the information and coordinate a response by sending out an electrical nerve impulses to an effector

Question 13

where would you find the effectors and what do they do

Answer 13

in the muscles and they make the response happen

Question 14

what is the synaps

Answer 14

the space between neurons

Question 15

in what form is the information carried along a nerve

Answer 15

electrical nerve impulses

Question 16

what is a neurotransmitter

Answer 16

the chemical that transmit messages across the synaps between neuron’s

Question 17

what is another name for a nerve cell

Answer 17

neuron

Question 18

what does the sensory neuron connect

Answer 18

connects receptors to the CNS

Question 19

what does the inter neuron connect

Answer 19

connects the sensory to the motor neuron in the CNS

Question 20

why are reflex actions important

Answer 20

because they can prevent extra damage to the body

Question 21

where does insulin get made

Answer 21

pancreas

Question 22

name the neuron involved in the reflex arc

Answer 22

sensory neuron

Question 23

3 examples of reflex actions

Answer 23

Blinking, sneezing and moving your hand away from a hot object

Question 24

what is the space between nuerons called

Answer 24

synapse

Question 25

how does an electrical impulse get transferred between neurons

Answer 25

a chemical transfer them between neurons

Question 26

what are the glands that produce hormones

Answer 26

endocrine glands

Question 27

what are hormones and how do they travel in the body

Answer 27

chemical messages that travel in the bloodstream

Question 28

why do hormones only affect certain parts of the body

Answer 28

only the target tissues have complementary receptor proteins

Question 29

why is the response to hormones is slower then the nervous system

Answer 29

because they travel through the blood but electrical impulses are carried by nerves

Question 30

when do glucose levels rise

Answer 30

after a meal

Question 31

when do glucose levels fall

Answer 31

during exercise or while sleeping at night

Question 32

where are the hormones that control blood sugar level (insulin and glucagon) made

Answer 32

pancreas

Question 33

name two hormones that control blood sugar levels

Answer 33

Glucagon and insulin

Question 34

what is the optimal human body temoature

Answer 34

37 degrees

Question 35

explain exactly how insulin controls blood glucose levels

Answer 35

-Insulin (Lowers blood glucose) When the blood sugar is too high (after eating): The pancreas releases insulin into the blood. Insulin absorb glucose from the blood for energy. It also tells the liver to store extra glucose as glycogen for later use. resulting in the Blood glucose levels going down, bringing them back to normal

Question 36

explain how Glucagon controls blood glucose levels

Answer 36

-Glucagon (Raises blood glucose) When blood sugar is too low (between meals or during exercise): The pancreas releases glucagon into the blood. Glucagon tells the liver to release the stored glucose (glycogen) back into the bloodstream. Result: Blood glucose levels go up, bringing them back to normal.

Question 37

what conditions occurs if a person cannot control their blood glucose levels

Answer 37

type 1 diabetes

Question 38

where's glycogen stored

Answer 38

liver

Question 39

explain the process that happens when blood glucose levels are to LOW to higher them

Answer 39

the pancreas produces less insulin and release a different hormone called glucagon. glucagon causes stored glycogen in the liver to be broken down into glucose. glucose released into the blood causing a rise in levels.

Question 40

explain the process that happens when blood glucose levels are to HIGH to lower them

Answer 40

the high level trigger the release of insulin from the pancreas into the bloodstream. The insulin stimulates the liver to absorb glucose from the blood. The glucose is then converted into glycogen causing the levels to fall

Question 41

where's glycogen stored in the body

Answer 41

liver

Question 42

which hormone is responsible for converting excess glucose into a storage carbohydrate

Answer 42

insulin

Question 43

which hormone converts the storage carbohydrate back into glucose

Answer 43

glucagon

Question 44

what is the gap between neutrons called

Answer 44

synapse

Question 45

what is glucose used for in the body

Answer 45

energy

Question 46

identify two reponses to an increase in body temperature

Answer 46

decreasing the blood flow to the skin sweating as it cools down the body

Question 47

identify two reponses to an decrease in body temperature

Answer 47

blood diverted from skin shivering arm hair stands up

Question 48

why is it important that the body tempature is kept around 37'degrees

Answer 48

its the best temperature for the body enzymes to work