Kidney
- Created by: KayshaN
- Created on: 29-10-17 19:14
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- Kidney
- Structure
- Three main areas:
- the cortex- dark outer layer, filtering of blood takes palce
- the medulla- lighter colour tubules of nephron, pyramids and collecting ducts
- the pelvis- central chamber where urine collects
- Nephron
- Bowman's Capsule
- cup shaped, contains glomerulus
- Untitled
- cup shaped, contains glomerulus
- Proximal Convoluted Tubule
- first coiled region of tubule. Substances reabsorbed
- Loop Of Henle
- long loop, descending limb and ascending limb
- Distal Convoluted Tubule
- second twisted tubule, water balancing of the body takes place
- Collecting Duct
- urine passes down through medulla to cortex, more water balancing
- Bowman's Capsule
- Three main areas:
- Function
- Ultrafiltration
- glomerulus supplied with blood wide afferent arteriole, out narrow efferent arteriole- pressure
- blood out of capillary wall- sieve
- passes through basement membrane except blood cells and proteins
- wall of Bownman's capsule podocytes, additional filters. Extensions called pedicels wrap around capillaries- slits
- if any big proteins get through basement, don't get into tubule
- Ultrafiltration
- glomerulus supplied with blood wide afferent arteriole, out narrow efferent arteriole- pressure
- blood out of capillary wall- sieve
- passes through basement membrane except blood cells and proteins
- wall of Bownman's capsule podocytes, additional filters. Extensions called pedicels wrap around capillaries- slits
- if any big proteins get through basement, don't get into tubule
- if any big proteins get through basement, don't get into tubule
- wall of Bownman's capsule podocytes, additional filters. Extensions called pedicels wrap around capillaries- slits
- passes through basement membrane except blood cells and proteins
- blood out of capillary wall- sieve
- glomerulus supplied with blood wide afferent arteriole, out narrow efferent arteriole- pressure
- Ultrafiltration
- if any big proteins get through basement, don't get into tubule
- wall of Bownman's capsule podocytes, additional filters. Extensions called pedicels wrap around capillaries- slits
- passes through basement membrane except blood cells and proteins
- blood out of capillary wall- sieve
- glomerulus supplied with blood wide afferent arteriole, out narrow efferent arteriole- pressure
- Reabsorption
- Proximal Convoluted Tubule
- Loop Of Henle
- Distal Convoluted Tubule
- Collecting Duct
- Reabsorption
- Proximal Convoluted Tubule
- Loop Of Henle
- Distal Convoluted Tubule
- Collecting Duct
- balancing of water needs. If body lacks ions, actively pumped in. If water not needed, increase ADH, increase permeability.
- water diffuses out down collecting duct
- water diffuses out down collecting duct
- Collecting Duct
- arrives isotonic to with blood and tissue fluid
- descending limb- water moves out down conc gradient, lower part permeable, ion conc moving through medulla increase due to AL
- not permeable to Na and Cl ions. Reaching hairpin very concentrated. Hypertonic to blood
- ascending limb- very permeable to Na and Cl. Out down conc gradient. Second section actively pumped out. Impermeable to water, cant follow
- fluid left, increasingly dilute. Top hyportonic to blood
- Distal Convoluted Tubule
- glucose, amino acids and hormones moved back in by active transport. Na moved by active transport, Cl ions and water move passively
- Loop Of Henle
- Proximal Convoluted Tubule
- Reabsorption
- balancing of water needs. If body lacks ions, actively pumped in. If water not needed, increase ADH, increase permeability.
- water diffuses out down collecting duct
- water diffuses out down collecting duct
- Collecting Duct
- arrives isotonic to with blood and tissue fluid
- descending limb- water moves out down conc gradient, lower part permeable, ion conc moving through medulla increase due to AL
- not permeable to Na and Cl ions. Reaching hairpin very concentrated. Hypertonic to blood
- ascending limb- very permeable to Na and Cl. Out down conc gradient. Second section actively pumped out. Impermeable to water, cant follow
- fluid left, increasingly dilute. Top hyportonic to blood
- Distal Convoluted Tubule
- glucose, amino acids and hormones moved back in by active transport. Na moved by active transport, Cl ions and water move passively
- Loop Of Henle
- Proximal Convoluted Tubule
- Ultrafiltration
- Structure
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