Sistema urinario
Andrea RománTarea5 de Octubre de 2015
320 Palabras (2 Páginas)143 Visitas
EXCRETORY OR URINARY SYSTEM (Chapter 16, p. 254)
Instructions: With the video, your ebook and class notes answer the following about this system.
- [pic 1]Which organs make up the Urinary system? Label & briefly explain their function.
[pic 2]
- Mention the functions of the Excretory System:
a. Excretion of metabolic wastes.
b. Maintain body fluids.
c. Maintain Acid-Base balance.
d. Secretion of hormones.
- About the kidneys, complete the following table:
A. | How many kidneys we have? | Two |
B. | Where are they located? | On either side of the body, underneath the diaphgram near the lower back. |
C. | What form they have? What about their size? | Small size organs. |
D. | Which is the FUNCTIONAL UNIT of the kidney? | Nephrons |
E. | Which structures make up a nephron? | Glomerular capillaries, Bowsman’s capsule, Proximal convoluted tubule, Loop of Henle, Distal convoluted tubule, Collecting duct |
F. | What´s the function of a nephron? | To filter and clean the blood. Absorbs glucose and amino acids and expels urine. |
- [pic 3][pic 4]In the next drawing, label the parts of the nephrons. [pic 5][pic 6][pic 7]
- Urine formation at the nephrons: Explain the 3 steps and the involved structures.
Name of the step | Description | Nephron parts involved |
Glomerular filtration | ||
Tubular reabsorption | ||
Tubular secretion |
- Regulatory Functions of the Kidneys: EXPLAIN how ADH (antidiuretic hormone) and Aldosterone work in order to adjust urine concentration.
ADH: When there is too much salt in the body, the pituitary gland secretes ADH, the nephron reabsorbs water into the body and now the body has more water and less salt concentration.
Aldosterone: When there is low volume of blood, the adrenal glands above each kidney secrete aldosterone, Na goes up and we have water reabsorption back into the bloodstream and then the urine becomes more concentrated because of less water.
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