Revision Flashcards
(32 cards)
What are the main things that need to be balanced in Homeostasis
Water content
Ions
Body Temperature
Blood Glucose Concentration
What is the role of the kidneys
They filter out small molecules from the blood, water, salts, glucose and urea
How is urine made
Urea and some water and some salts are reabsorbed by the blood and what is left is stored in the Bladder
What does the thermal regulatory centre in the brain do?
Controls our body temperature
How do receptors help us in homeostasis?
They can detect what the conditions are outside and tell the Thermal Regulatory Centre in the brain to respond
What is an effect of really high temperatures?
Heatstroke
Dehydration
What is an effect of really cold temperatures
Hyperthermia
What controls glucose levels
The Pancreas
What does the pancreas produce?
Insulin
What does insulin do?
Makes the glucose to be stored in your cells when your blood glucose levels are too high
What is a store if glucose called?
Glycogen
What happens in Type 1 diabetes
The body does not produce enough insulin so the person needs it to be injected
What happens in Type 2
Exercise and looking after your diet can combat Type 2 diabetes
What is homeostasis?
The maintaining of your body levels
How long does a period last?
About 28 days
What happens during a period?
A Follicle Stimulating Hormone is produced causing and egg to mature in the ovaries
What produces FSH
The pituitary gland
And it happens at the beginning of the period
What is produced in the overies
Oestrogen
Around 4-5 days into the period
What does Oestrogen do?
Causes the lining of the uterus to grow
Stimulates the release of LH
LH (Luteinising Hormone)
13-15 days
Releases an Egg
Produced by Pituitary Gland
Propesterone
When Progesterone falls lining breaks down
This is only if the egg isn’t fertilised
When does the lining of the uterus get thicker?
When the egg can be fertilised
Urea is produced in the liver by the breakdown of excess
Amino acids
What is a Stimulus
A change outside
