B5 - Homeostasis

Question 1

What is homeostasis

Answer 1

Keeping conditions in your body and cells at the right level

Question 2

When does homeostasis happen ?

Answer 2

Happens in response to changes inside and outside of the body

Question 3

Why is homeostasis important ?

Answer 3

It is importsnt because your cells need the right conditions to work properly

Question 4

What do control systems do ?

Answer 4

They keep conditions in your body steady

Question 5

When the level of something is too high ornlow then the

Answer 5

Control system brings it back to normal

Question 6

What is the Central Nervous System ?

Answer 6

Consists of the brain and spinal cord.CNS is connected to the body by sensory neurones and motor neurones

Question 7

What are receptors

Answer 7

Receptors are the cells that detect stimuli.Different receptors detect different stimuli.

Question 8

What are sensory neurones

Answer 8

These carry info as electrical impulses from the receptors to the CNS

Question 9

What are motor neurones ?

Answer 9

These carry electrical impluses from the CNS to effectors

Question 10

What are effectors

Answer 10

Effectors respond to electrical impulses and bring about change

Question 11

What are examples of effectors

Answer 11

Muscles and glands

Question 12

What is a synapse

Answer 12

Where two neurones join together

Question 13

What do synapses do

Answer 13

The electrical impulse is passed from one neurone to the next by chemicals .These chemicals move across the gap, chemicals set off new electrical impulse in the next neurone

Question 14

What are hormones

Answer 14

Hormones are chemicals released by glands

Question 15

What does the pituitary gland do

Answer 15

Produces many hormones that regulate body conditions .Thse hoemonss act on other glands.They make the glands release hormones that bring about change

Question 16

What dies the thyroid gland do

Answer 16

Produces thryroxine.
Involved in regulating things like the rate of metabolism

Question 17

What does the adrenal gland do ?

Answer 17

Produces adrenaline
Used to prepare for a fight or flight response

Question 18

What does the pancreas do ?

Answer 18

Produces insulin.
Used to regulate the body glucose level

Question 19

What do the ovaries do ?

Answer 19

Produce oestrogen
Involved in the menstrul cycle

Question 20

What do the testes do ?

Answer 20

Produce testosterone.
Controls puberty and sperm production

Question 21

Why is glucose removed from the body by cells

Answer 21

To use it for energy

Question 22

Changes in the blood glucose concentration is controlled by the

Answer 22

Pancreas

Question 23

When the blood glucose concentration is too high

Answer 23

The pancreas releases the hormone insulin to reduce it.

Question 24

What does insulin cause ?

Answer 24

Causes glucose to move into cells

Question 25

Gluxose moves from the blood to the liver and muscle cells.

Answer 25

Glucose is converted to glycogen in the liver and muscle cells

Question 26

What is Type 1 diabetes

Answer 26

Where the pancreas produce little or no insulin.This means a person's blood glucose level can rise to a level that can kill them

Question 27

What do People with Type 1 diabetes do

Answer 27

Inject insulin throughout the day

Question 28

What is Type 2 diabetes

Answer 28

Where a person becomes resistant to their own insulin .They still produce insulin but their body cells don't respond properly to it

Question 29

How can Type 2 diabetes be controlled

Answer 29

By eating a carbohydrate controlled diet and taking regular excercise

Question 30

At puberty , body starts releasing sexual hormones.These sexual hormones trigger

Answer 30

Secondary sexual characteristics

Question 31

What is Step 1 of the Menstrual Cycle ?

Answer 31

Day 1 is where bleeding starts.Uterus lining breaks down for about 4 days

Question 32

Menstrual Cycle Stage 2

Answer 32

Utuerus lining starts to build up again from Day 4 to Day 14.It builds into a thick spongy layer full of blood vessels .Now ready to recieve a fertilised egg

Question 33

Menstrual Cycle Stage 3

Answer 33

An egg develops and is released from the ovary at Day 14.This is called ovulation

Question 34

What is Stage 4 of Menstrual Cycle

Answer 34

The wall is maintained for about 14 days until day 28.If no fertilised egg has hit the uterus wall by Day 28 the spony lining starts to break down again

Question 35

What is oral contraceptives

Answer 35

Oral contraceptives ae taken through the mouth as pills.They atop the hormone FSH from being released.This stops the egg maturing

Question 36

Disadvantage of oral contraceptives

Answer 36

Can have bad side affects.Can cause headaches and make you feel sick

Question 37

What is contraceptive patch

Answer 37

Small patch that is stuck to the skin.Lasts one week

Question 38

What is contracpetive implant

Answer 38

Inserted under the skin of the arm .Implant can last 3 years

Question 39

Contraceptive injection

Answer 39

Each dose lasts two to three months

Question 40

Some hormonal contracpetives work by releasing progeasterone.

Answer 40

This stops egg from maturing or being released from the ovaries

Question 41

What do non hormonal contraceptives do

Answer 41

Stop the sperm meeting the egg

Question 42

What is a diaphragm

Answer 42

Shallow plastic cup that fits over the entrance of the uterus

Question 43

What is sterilisation

Answer 43

Sterilisation involves cutting or tying the fallopian tubes ( females Sterilisation involves cutting or tying the sperm ducts ( males )

Question 44

What is natural methods

Answer 44

Avoided by not having sexual intercourse when the women is at the stage of the menstrual cycle when she is most likely to get pregnant

Question 45

What is abstinance

Answer 45

Not having sex