Homeostasis Keeping the body functions in balance

 Draw a concept (spider diagram) to show which organs or hormones of the body are responsible for monitoring and fixing the following;  Temperature  Blood sugar  Water  Salt

The Kidney Anatomy and Function

Lesson objectives  Knowledge: Understand the structure and function of the kidney  Skills Learn how to carry out an accurate dissection.

Activity 1  Work in pairs, with one kidney between two.  Make a sketch diagram of the kidney, labelling the following structures.  Renal capsule, renal vein and artery, ureter, cortex, medulla

1. Renal Artery 2. Glomerulus 3. Bowman’s capsule 4. Proximal tubule 5. Loop of Henle 6. Distal tubule 7. To ureter

Parts of the Nephron 1. Renal Artery 2. Glomerulus 3. Bowman’s capsule 4. Proximal tubule 5. Loop of Henle 6. Distal tubule 7. To ureter

How it works  High pressure forces water, urea, ions and glucose into the Bowman’s capsule.  Big molecules, such as proteins stay in the blood.  Sugar is reabsorbed into blood  Sufficient ions are reabsorbed, excess is not.  Sufficient water is reabsorbed depending on levels of ADH.  Excess water and ions and all urea are excreted.

Water regulation  Hypothalamus in brain instructs pituitary gland to release ADH.  Too little water, a lot of ADH so water reabsorbed. Concentrated urine  Opposite for too much water so pale urine.  Dialysis hrs week.  Transplant.