Share AQA GCSE Biology Paper 2
Save to Folder
How can type II diabetes be treated?
It can be controlled by eating a carbohydrate controlled diet and getting regular exercise.
What is the role of the kidneys.
Kidneys make urine by taking unwanted waste products out of your blood. They are involved in selective reabsorption.
Name three things that are re-absorbed by the kidneys into the blood.
Glucose, water and ions.
Name three things that are removed from the body in the urine.
Urea, water and ions.
What is deamination?
Proteins (excess amino acids) cannot be stored by the body. Excess amino acids are converted to fats and carbohydrates. This occurs in the liver.
What is produced as a waste product of deamination?
Ammonia is produced as a waste product. Ammonia is toxic so it is converted into urea in the liver.
What hormone controls the amount of water absorbed by the kidneys?
ADH
What happens when the concentration of water in the blood is too low. I.e. the Blood is MORE concentrated.
Receptors in the hypothalamus detects the water content is too low. The coordinator in the brain receives the information and coordinates a response....
What happens when the concentration of water in the blood is too high. I.e. the Blood is dilute/LESS concentrated.
See an expert-written answer!We have an expert-written solution to this problem!
How does a dialysis machine work?
In a dialysis machine the patients blood flows between a partially permeable membrane surrounded by dialysis fluid. The dialysis fluid contains the sa...
What is the purpose of the partially permeable membrane in the dialysis machine.
To only allow small soluble molecules (e.g. urea, water and ions) to move into the dialysis fluid, not large molecules like proteins.
What are the advantages and disadvantages of a kidney transplant over dialysis?
Kidney transplants are a cure, but they can be rejected. Patients are treated with immunosuppressants. People are not always on the donor list, relati...
What are the four stages of the menstrual cycle?
1) Menstruation-the uterus lining breaks down2) The uterus lining builds up again3) Ovulation-Around day 14 a egg is released from an ovary.4) The wal...
What is the role of FSH (Follicle stimulating hormone) in the menstrual cycle?
Made in the pituitary gland.Causes a egg to mature in one of the ovaries in a structure called a follicle.Stimulates the ovaries to produce oestrogen.
What is the role of oestrogen in the menstrual cycle?
Produced by the ovaries. Causes the lining of the uterus to grow. Stimulates the release of LH (which causes ovulation) and inhibits the release of FS...
What is the role of LH (Luteinising hormone) in the menstrual cycle?
Produced in the pituitary gland.Stimulates the release of an egg (ovulation) at day 14.
