unit 2 - multicellular organisms Flashcards
What happens when blood glucose is too high?
Hyperglycaemia
Increase in insulin production to lower blood sugar
What happens when blood glucose is too low?
Hypoglycemia
Glucagon is released from the pancreas to increase blood glucose levels.
What happens when your body temperature is too low?
Hypothermia.
Shivering
Muscles contract, body hair stands upright
Blood is diverted away from the surface of the skin
What happens when your body temperature is too high?
Hyperthermia
Sweating
Blood is diverted towards the surface of the skin
Muscles are relaxed, hair lies flat
What is hypothermia?
Hypothermia is when your body temperature drops too low (<35c)
What is hyperthermia?
When your body temperature is too high. (>40c)
What is normal body temperature?
37c
What do plants need to germinate?
WOW.
Water
Oxygen
Warmth
What do plants need to continue to grow?
Light
Water
Minerals
What do animals (including humans) need to be healthy?
Water
Oxygen
Food
Shelter
What percentage of DNA do we get from our parents?
50% from each.
Why can some people roll their tongue and some can’t?
Some people do not inherit the dominant gene for tongue rolling, which means they will be incapable of rolling their tongue.
What are 5 commercial uses of plants?
Medicine
Raw Material
Food
Fuel
Aesthetic Reasons
What are 5 methods of growing plants?
Runners
Tubers
Bulbs
Cuttings
Seeds
State 4 facts about Asexual reproduction.
The offspring of asexual reproduction do not show variation. They are identical copies of their parent.
Favourable genetics are always passed along.
Only one parent is involved for asexual reproduction.
Populations grow faster with asexual reproduction.
Asexual reproduction is completed in a very short amount of time.
Fertilisation does not take place in asexual reproduction.
The offspring of asexual reproduction mature faster.
State 4 facts about Sexual reproduction.
Sexual reproduction creates genetic diversity amongst offspring.
Two parents are needed.
At least one offspring is produced.
Favourable genetics may not be passed to the offspring.
Less offspring are produced.
The species can adapt to new environments well.
The offspring of sexual reproduction have a higher disease resistance.
It is slower than Asexual reproduction.
What is the male sex cell of a plant?
Pollen
What is the female sex cell of a plant?
Ovule
What part of the plant reproductive system produces ovules?
The ovaries.
What does the ovaries produce?
Ovules, the female sex cell.
What part of the plant reproductive system produces pollen?
The Anther
What is the purpose of the sepal?
Protects the unopened flower bud
What is the purpose of the petals?
Attracts insects
What is the stigma and what does it do?
The stigma is the top part of the female part of a flower. It collects pollen grains.
