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Homeostasis

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:

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Homeostasis

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  1. Homeostasis Keeping the body functions in balance

  2. 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

  3. The Kidney Anatomy and Function

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

  5. 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

  6. Renal Artery • Glomerulus • Bowman’s capsule • Proximal tubule • Loop of Henle • Distal tubule • To ureter

  7. Parts of the Nephron • Renal Artery • Glomerulus • Bowman’s capsule • Proximal tubule • Loop of Henle • Distal tubule • To ureter

  8. 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.

  9. 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 12-18 hrs week. • Transplant.

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