Biology- Homeostasis and Co-ordination

Question 1

Examples of stimulus

Answer 1

ight from ball, heat, sound

Question 2

Examples of Receptor

Answer 2

eyes

Question 3

Example of Co-ordinating centre

Answer 3

brain

Question 4

Example of Effector

Answer 4

muscles

Question 5

Example of Response

Answer 5

catch the ball

Question 6

Which feature of the cell allows oxygen to pass through quickly?

Answer 6

It is thin,

Question 7

Oxygen passes through the cell by…

Answer 7

diffusion

Question 8

Diffusion:

Answer 8

The movement of a gas or liquid from an area of high to low concentration.

Question 9

Osmosis:

Answer 9

The diffusion of water from an area of high water concentration to an area of low water concentration through a partially permeable membrane.

Question 10

Active Transport:

Answer 10

The movement of gas or liquid from an area of low concentration to high concentration with an input of energy.

Question 11

Brain and spinal cord=

Answer 11

central nervous system (CNS)

Question 12

process…

Answer 12

sensory neurone- synapse- relay neurone- CNS- relay neurone- motor neurone

Question 13

Homeostasis:

Answer 13

maintaining a constant internal environment. Organisms must be able to respond to their environment.

Question 14

Brain….

Answer 14

senses water content and blood temperature

Question 15

Pancreas-

Answer 15

senses blood glucose level

Question 16

neurone-

Answer 16

specially adapted cell which carries electrical impulse

Question 17

nerve-

Answer 17

collection of neurones

Question 18

Reflex action:

Answer 18

an automatic response that occurs without thought

Question 19

heart, lungs and brain produce ….

Answer 19

most heat

Question 20

Shivering:

Answer 20

shaking uncontrollably as a result of being cold

Question 21

Blood sugar too high:

Answer 21

Hormone insulin released, no glucagon released

glucose stored as glycogen. The liver processes the blood back to normal.

Question 22

Blood sugar too low:

Answer 22

Pancreas releases hormone glucagon, no insulin is released, glycogen changes to glucose

Question 23

GLUCAGON

Answer 23

Hormone

Question 24

GLYCOGEN

Answer 24

Storage of glucose

Question 25

sweat=

Answer 25

H2O and salt 


Question 26

Type 1

Answer 26

Insulin Dependent
Symptoms: lots of urine, thirsty, shaky, tired, sugar in urine Cause: Genetic link and trigger (virus) Problem: Produces less or no insulin Treatment: Inject insulin, measure blood sugar levels 4-6 times a day

Question 27

Type 2

Answer 27

Non-insulin Dependent Symptoms: lots of urine, thirsty, shaky, tired, sugar in urine Cause:Genetic factors, diet, obesity Problem: producing insulin but cells are not responsive to the insulin Treatment: diet, increase exercise, drugs to increase responsiveness

Question 28

How does sweating help the body?

Answer 28

It decreases the body temperature as more of the heat energy is used to evaporate the sweat from the body.