B3 Urinary system, Kidney structure & Osmoregulation
- Created by: emilycrowhurst
- Created on: 15-03-16 19:23
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- Urinary system, Kidney Structure & Osmoregulation
- Urinary system
- Its job is to filter and clean the blood
- Kidneys
- Renal vein and artery
- Ureter (transports urine to bladder)
- Uretha
- Bladder
- Kidney Structure
- Excretion Organs
- 1. Removal of urea
- 2. Adjustment of ion levels
- 3. Adjustment of water content
- Nephrons
- Found in the kidney
- Filtration units
- Ultrafiltration
- 1. High pressure is built up which squeezes water, urea, ions and glucose out of the blood into the bowman's capsule.
- 2. The glomerulus and the bowman's capsule act like filters. Big molecules like proteins and blood cells are not squeezed out.
- Reabsorption
- Useful substances are reabsorbed
- 1. Glucose is selectively restored
- 2. Sufficient water is reabsorbed according to the level of ADH
- Ultrafiltration
- Filter blood and produce urine
- 1. Remove all urea from blood
- 2. Keep all glucose in the blood
- 3. Remove some water
- Osmoregulation
- Controlled by negative feeback
- HYDRATED
- Water gain
- Brain detects water gain
- Pituitary gland releases less ADH
- Lack of ADH means kidney absorbs less water
- HYDRATED
- Water gain
- Brain detects water gain
- Pituitary gland releases less ADH
- Lack of ADH means kidney absorbs less water
- Lack of ADH means kidney absorbs less water
- Pituitary gland releases less ADH
- Brain detects water gain
- Water loss
- Brains detects water loss
- Pituitary gland releases more ADH
- ADH makes kidney absorb more water
- ADH makes kidney absorb more water
- Pituitary gland releases more ADH
- Brains detects water loss
- Water gain
- HYDRATED
- Lack of ADH means kidney absorbs less water
- Pituitary gland releases less ADH
- Brain detects water gain
- Water loss
- Brains detects water loss
- Pituitary gland releases more ADH
- ADH makes kidney absorb more water
- ADH makes kidney absorb more water
- Pituitary gland releases more ADH
- Brains detects water loss
- Water gain
- Dialysis
- Dialysis machine can be used to filter blood
- Need to be connected to the machine several hours a week to keep urea levels in the blood from rising
- Waste products diffuse out into the dialysis fluid
- Transplant
- Save lives
- Better than a machine
- Needs to have matching tissues
- Kidney can be rejected
- Drugs are constantly used to help prevent rejection
- Urinary system
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