Unit 1 Flashcards
(28 cards)
What are three conditions homeostasis has to keep in balance?
Water levels
Sugar levels
Body temperature
What are the seven main food groups?
Carbohydrates Proteins Fats Water Fibre Vitamins Minerals
What is the metabolic rate?
The speed at which chemical reactions take place in your body.
What is IVF?
Mixing the egg and sperm outside the body
Explain how IVF works?
FSH is used to cause the egg to mature. The egg is then removed. Mixed with sperm outside the body then put back into the womb.
Give an advantage and a disadvantage of IVF
It means women who can’t get pregnant naturally can have a child.
It can be quite expensive.
What is a hormone?
A chemical messenger.
Where is FSH produced and what does it do?
It is produced in the pituitary gland and cause the egg to mature
Where is LH produced and what does it do?
It is produced in the pituitary gland and causes the egg the released.
Where oestrogen produced and what does it do?
It is produced in the ovaries and causes the lining of the womb to develop.
When developing new drugs why do they need to be tested before being released?
To check if they are toxic or have any side effects.
What is the definition of Homeostasis?
Keeping all internal condition in balance
What is a placebo pill?
It is a pill which contains no drug and this helps doctors see the real effect of medicine during trials.
What is thalidomide and what has it done?
It was originally a sleeping pill but it was then used for morning sickness but wasn’t tested right so caused birth defects.
What is a statin?
A pill which lowers cholesterol in the blood to reduce the risk of cardiovascular disease.
What is the definition of immunity?
It is when your body has learnt how to make the antibodies needed to kill a pathogen you’ve already had.
What does a vaccine contain and how does it help?
A vaccine contains a tiny amount of dead or inactive pathogens. It causes the body to create antibodies for that pathogen so if you get an active version you already have the antibodies to kill the pathogens
What is a pathogen?
Harmful bacteria
What are the characteristics of a bacteria cell?
They reproduce rapidly and they make toxins. They a re also very small
What are the characteristics of a virus cell?
They reproduce inside of your cells, they damage your cells and they are very very small.
How can pathogens spread?
Droplet infection
Direct contact
Break in skin
Contaminated food or drink
What do white blood cells do?
They ingest pathogens, make antibodies and anti-toxins
What is a gateway drug?
A drug which leads to harder more dangerous drugs.
What do drugs do?
Drugs change the chemical processes in your body making you addicted.
