Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: GCSE Biology 2.6 - Homeostasis and the Kidney
Description: These are concise, exam-focused notes made using the WJEC specification and BBC Bitesize. (I achieved an A.) This is one of eight topics in the unit.
Description: These are concise, exam-focused notes made using the WJEC specification and BBC Bitesize. (I achieved an A.) This is one of eight topics in the unit.
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
2
...
The selective reabsorption of glucose, some salts and much of the water
•
Small molecules, including urea, glucose, salts and water, are forced from the
capillary knot into the Bowman’s capsule
...
The kidneys produce concentrated urine if there is too little water in the blood
...
As the water level in the blood decreases, there is an increase in the secretion of
ADH which causes the kidney to reabsorb more water
...
19
Dialysis
•
•
+
+
−
−
−
−
can be used to treat kidney failure
restores the concentration of dissolved substances in the blood to normal levels
can keep a patient alive whilst looking for a suitable donor
does not involve major surgery
Patients need to follow a carefully controlled diet
...
very expensive
will only be successful for a certain amount of time
How a dialysis machine works
•
•
•
Dialysis fluid must contain the same concentration of glucose and salts as blood plasma
...
Transplant
•
•
•
+
+
−
−
−
−
A diseased kidney may be replaced by a healthy one by transplant from a donor of a similar
‘tissue type’ to the recipient
...
Close family members are more likely to have similar tissue types to the recipient
...
Long periods of time on dialysis are no longer necessary
...
Patients need to take drugs which suppress the immune system, leaving them susceptible to
contracting other diseases
...
requires major surgery
20
Title: GCSE Biology 2.6 - Homeostasis and the Kidney
Description: These are concise, exam-focused notes made using the WJEC specification and BBC Bitesize. (I achieved an A.) This is one of eight topics in the unit.
Description: These are concise, exam-focused notes made using the WJEC specification and BBC Bitesize. (I achieved an A.) This is one of eight topics in the unit.