B10 And 11

Question 1

Homeostasis

Answer 1

homeostasis in the regulation of the internal conditions of a cell or organism to maintain optimum conditions for function in response to internal and external changes.

Question 2

What is controlled by homeostasis

Answer 2

control of blood glucose concentration
body temperature
water levels

Question 3

Types of control systems

Answer 3

Nervous System-Electrical

Endocrince System-Hormonal/Chemical

Question 4

Nervous Response

Answer 4

Controlled by electrical impulses that travel through the neurons

Question 5

Chemical Response

Answer 5

Controlled by hormones travelling through the bloodstream

Question 6

What is the nervous system made up of

Answer 6

Central Nervous System

Peripheral Nervous System

Question 7

Central Nervous System

Answer 7

Consists of brain and spinal cord

Question 8

Peripheral Nervous System

Answer 8

Controls involuntary actions via peripheral nerve

Question 9

Types of neurons

Answer 9

Sensory
Relay
Motor

Question 10

How is a neuron adapted for its function

Answer 10

Dendrites that branch out
Long Axon
Myelin Sheath for insulation

Question 11

Path of an electrical impulse

Answer 11

Stimulus-receptor-sensory neuron-CNS-motor neuron-effector-response

Question 12

Synapse

Answer 12

Gap between 2 neurons

Question 13

How does an electrical impulse cross a synapse

Answer 13

Once the electrical impulse reaches the first neuron, stimulation of neurotransmitter chemicals release which bind to the second neuron and copies the message of the first neuron on to the second neuron.

Question 14

Reflex Actions

Answer 14

Inbuilt involuntary response to a stimuli controlled by PNS

Question 15

What is the endocrine system

Answer 15

Second coordination control system of the body consisting of glands

Question 16

Pathway in the endocrine system

Answer 16

Gland-hormone-bloodstream-target organ-response

Question 17

What is a hormone

Answer 17

Is a chemical produced by a gland which travels through the bloodstream and carries out a response

Question 18

What does the pituary gland secrete

Answer 18

FSH (follicle stimulating hormone)
LH (leteunising hormone)
ADH (anti dieuretic hormone)

Question 19

What does the thyroid gland secrete

Answer 19

Thyroxine

Question 20

What do the adrenal glands secrete

Answer 20

Adrenaline

Question 21

What does the pancreas secrete

Answer 21

Insuling and glucagon

Question 22

What do the ovaries secrete

Answer 22

Oestregen and Progesterone

Question 23

What do the testes secrete

Answer 23

Testosterone

Question 24

What does FSH do

Answer 24

Stimulates maturation of the egg

Question 25

What does LH do

Answer 25

Stimulates ovulation of the egg

Question 26

What does thyroxine do

Answer 26

Control metabolic reactions

Question 27

What does insulin do

Answer 27

Lowers glucose levels

Question 28

What does glucagon do

Answer 28

Raises blood sugar levels to homeostatic levels

Question 29

What does adrenaline do

Answer 29

Fight or flight response

Question 30

What does oestrogen do

Answer 30

Stimulates build up of the uterus lining

Question 31

What does progesterone do

Answer 31

Maintains the uterus lining in case of egg being fertilised

Question 32

What does testosterone do

Answer 32

Controls puberty in males

Question 33

Hormones in women acronym

Answer 33

Fsh Oestrogen Lh Progesterone

Question 34

What is the difference between nervous and endocrine system

Answer 34

Nervous is electrical whereas endocrine is hormonal

Question 35

Which organ detects blood sugar levels

Answer 35

Pancreas. If blood sugar is low glucagon is released if high insulin is released

Question 36

Type 1 diabetes

Answer 36

Where the body fails to produce enough insulin

Question 37

Type 2 diabetes

Answer 37

Where the body produces insulin but no response is given

Question 38

How is type 1 diabetes caused

Answer 38

By birth or heritage

Question 39

How is type 2 diabetes caused

Answer 39

By lifestyle

Question 40

Cures of type 1 diabetes

Answer 40

Humalin a genetically engineered bacteria | Insuling pump

Question 41

Cures for type 2 diabetes

Answer 41

Drugs to enhance the effect of insulin on the body Low carb diet Regular exercise

Question 42

Negative feedback

Answer 42

Is an important type of control found in homeostasis. It responds to a change and tries to regulate it back to homeostatic levels

Question 43

General stages in negative feedback

Answer 43

If a level of something rises it tries to decrease it | If a level of something lowers it tries to increase it

Question 44

Conditions controlled by negative feedback

Answer 44

Thermoregulation | Blood sugar regulation (insuling when high glucagon when low)

Question 45

Thyroxine

Answer 45

Controls the rate of metabolic reactions

Question 46

Adrenaline

Answer 46

Stimulus for the fight or flight response produced in times of stress

Question 47

Effects of adrenaline

Answer 47

Increased heart rate and breathing rate for oxygen and glucose for respiration Pupils dilate to let more light in

Question 48

Hormonal contraceptive methods

Answer 48

The pill Contraceptive injection The coil

Question 49

Non hormonal contraceptive methods

Answer 49

Barrier methods Spermicides Abstinence Surgical methods

Question 50

Causes of infertility

Answer 50

Low sperm count Obesity Eating disorders Increasing maternal age

Question 51

Which hormones are used in fertility treatment

Answer 51

FSH | LH

Question 52

Stages of IVF

Answer 52

1. Involves giving mother fertility drugs 2. The eggs are collected and fertilised by sperm from the father 3. The fertilised egg is developed into embryos 4. When the embryos mature enough they are inserted back into the mother as a normal baby would

Question 53

Disadvantages of IVF

Answer 53

Emotionally and physically stressful | The success rates are not high