MICROANATOMY

URINARY SYSTEM AND MALE FEMALE REPRODUCTIVE SYSTEMS

URINARY SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which substances are too large to pass through the glomerular pores (and therefore remain as part of the blood)?
A
proteins, urea, salt, red blood cells, white blood cells
B
salt, proteins, amino acids
C
red blood cells, white blood cells, proteins
D
urea, proteins, glucose, white blood cells
Explanation: 

Detailed explanation-1: -They include water, nitrogenous wastes (like urea and creatinine), nutrients (like glucose and amino acids), and salts. These substances are too big to escape the glomerulus and therefore they remain in the blood.

Detailed explanation-2: -Explanation: Cells and large proteins are too large to cross the capillary membranes of the glomerulus, and cannot be filtered into Bowman’s capsule. After this initial step of filtration, urine in the nephron is only affected by secretion and reabsorbtion of water, ions, and other small molecules.

Detailed explanation-3: -The glomerulus filters water and small solutes out of the bloodstream. The resulting filtrate contains waste, but also other substances the body needs: essential ions, glucose, amino acids, and smaller proteins.

There is 1 question to complete.