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Question 1

What is homeostasis

Answer 1

An organisms ability to regulate its internal conditions

Question 2

What 3 things need to be regulated in our body

Answer 2

Blood glucose levels
Water levels
Temp

Question 3

What is the pns

Answer 3

Peripheral nervous system which is all other nerves apart from brain and spinal chord

Question 4

Give an example of a receptor

Answer 4

Skin

Question 5

What neuroses does the electrical impulse travel though once a stimulus has been detected

Answer 5

Sensory and relay neurone

Question 6

What chemical helps the impulse to travel across the synapse

Answer 6

Neurotransmitter

Question 7

What neurons does the reaction travel through to

Answer 7

Relay and motor

Question 8

What is a reflex

Answer 8

When a signal passes the brain and goes straight to the spine to the effector

Question 9

What are glands

Answer 9

Effectors which secrete chemicals

Question 10

What is the method for the reaction time practical

Answer 10

Drop the ruler between finger and thumb
Measure distance fallen before caught, repeat and calculate mean

Question 11

What is the independent variable of the reaction time practical

Answer 11

Stimulant eg energy drink

Question 12

What is the endocrine system

Answer 12

System of glands that produce of secrete hormones that travel via the blood

Question 13

What is the pituitary gland

Answer 13

Gland in the brain that sends signals to other glands

Question 14

What is the pituitary gland

Answer 14

Gland in the brain that sends signals to other glands

Question 15

What does the pancreas do

Answer 15

Secretes insulin to control blood sugar

Question 16

What does the thyroid do

Answer 16

Controls growth and metabolism

Question 17

Empty card idk how

Question 18

What does the pancreas do when blood glucose levels are high

Answer 18

Secretes insulin
Causes glucose to move from bloodstream into cells for respiration
Excess glucose converted into glycogen as energy store

Question 19

What does the pancreas do if blood glucose levels are to low

Answer 19

Secretes glucagon
Causes liver and muscles to convert glucogen back into glucose

Question 20

What is type 1 diabetes

Answer 20

When pancreas cannot produce insulin
Injections are needed

Question 21

What is type 2 diabetes

Answer 21

When cells don’t absorb glucose as they should
Obesity increased risk

Question 22

What is fsh

Answer 22

From the pituitary gland causes an egg to mature and ovaries to produce oestrogen

Question 23

What does oestrogen do

Answer 23

Causes uterus lining to thicken and inhibits FSH so no more eggs mature until the next cycle and causes pituitary glands to secrete LH

Question 24

What is LH

Answer 24

Causes egg to be released which starts to travel toward uterus
A sperm can fertilize it while in the oviduct

Question 25

What is progesterone

Answer 25

It’s secreted by the ovaries maintaining uterus lining

Question 26

What is IVF

Answer 26

Where eggs are collected after inducing release with LH to be fertilized in a lab

Question 27

Where are viable embryos taken

Answer 27

Inserted back into the woman’s uterus

Question 28

What do adrenal glands do

Answer 28

Increase blood flow and breathing rate to prepare you for fight or flight

Question 29

What happens during meiosis

Answer 29

Chromosomes in diploid cells are copied Similar chromosomes pair up and genes are swapped between them The cell divides to produce two diploid cells These divide again to produce 4 haploid cells called gametes

Question 30

What is an advantage of sexual reproduction

Answer 30

Offspring can become better adapted to the environment

Question 31

More spare ffs

Question 32

What is an advantage of asexual reproduction

Answer 32

Only one organism needed to produce

Question 33

What is a genome

Answer 33

The entire genetic code in an organism

Question 34

What is a gene

Answer 34

Portion of DNA that codes for a protein

Question 35

What is a genotype

Answer 35

An organisms specific genetic code

Question 36

What is a phenotype

Answer 36

How this code is expressed in physical characteristics

Question 37

What are characteristics determined by

Answer 37

The type and quantity of proteins synthesized

Question 38

What is an allele

Answer 38

Different version of the same gene

Question 39

What are dominant alleles

Answer 39

Expressed when a genotype contains a recessive allele

Question 40

What are BB and bb alleles called

Answer 40

Homozygous

Question 41

What are alleles Bb called

Answer 41

Heterozygous

Question 42

What diseases can be caused by dominant alleles

Answer 42

Polydactyl and cystic fibrosis

Question 43

What is variation

Answer 43

The result of both genetic and environmental factors

Question 44

Explain Darwin’s theory of evolution

Answer 44

Random mutations result in variation Some organisms better adapted to environment These compete Those better adapted are more likely to survive

Question 45

What is anti biotic resistant bacteria

Answer 45

If not all bacteria are killed those most resistant will reprise this is why u must complete the full course of antibiotics

Question 46

What can organisms of the same species do

Answer 46

They can produce fertile offspring