urinary system

Question 1

urinary system

Answer 1

• Maintains volume and composition of body fluids within normal limits (osmoregulation).
• It removes waste products of cellular metabolism from the body (excretory system).
• Close association with the reproductive system (urogenital system and renal system).

Question 2

functions

Answer 2

Homeostasis (osmoregulation - water balance).

• Electrolyte balance.
• Removal of nitrogenous wastes and toxins.
• Blood pH balance: excrete H+ ions, reabsorb HCO3
• , maintains blood pH at around 7.4.
• Blood pressure regulation (renin).
• Red blood cell production (erythropoietin).

Question 3

OSMOREGULATION

Answer 3

The kidney is the principle organ that regulates volume and composition of the internal fluid environment.
- Water and solute concentrations must be balanced. All animals balance the gain and loss of water and dissolved

Question 4

the kidney

Answer 4

Plays a major role in conserving water. It regulates the somatic pressure of blood.

• When fluid intake is high, the kidneys excrete dilute urine, saving salts and excreting water.
• When fluid intake is low, the kidneys conserve water by forming concentrated urine.

Question 5

glomerular filtration

Answer 5

• Glomerular Filtration: Creates a plasma like filtrate of the blood.
• Tubular Reabsorption: Removes useful solutes from the filtrate, and returns them to the blood
• Tubular Secretion: Removes additional wastes from the blood, and adds them to the filtrate.
• water conservation: Removes water from the urine an returns it to the blood; concentrates wastes.