MICROANATOMY

URINARY SYSTEM AND MALE FEMALE REPRODUCTIVE SYSTEMS

URINARY SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In humans, which substances are normally filtered out of the blood by the nephrons and then excreted?
A
water, carbon dioxide, and glucose
B
urea, water, and mineral salts
C
water, glycogen, and urea
D
glucose, water, and red blood cells
Explanation: 

Detailed explanation-1: -The most common waste products are urea and creatinine, but there are many other substances that need to be eliminated. The kidneys act as very efficient filters for ridding the body of waste and toxic substances, and returning vitamins, amino acids, glucose, hormones and other vital substances into the bloodstream.

Detailed explanation-2: -The kidneys remove waste products called urea from the blood through tiny filtering units called nephrons. There are about one million nephrons in each kidney.

Detailed explanation-3: -The glomerulus filters your blood As blood flows into each nephron, it enters a cluster of tiny blood vessels-the glomerulus. The thin walls of the glomerulus allow smaller molecules, wastes, and fluid-mostly water-to pass into the tubule. Larger molecules, such as proteins and blood cells, stay in the blood vessel.

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