AP BIOLOGY

ANIMAL PHYSIOLOGY

HUMAN CIRCULATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The most abundant compound in blood plasma, accountingfor about 92% of the total volume, is:
A
Oxygen
B
Gamma-globulin
C
Sodium chloride
D
Water
Explanation: 

Detailed explanation-1: -Plasma contains 91% to 92% of water and 8% to 9% of solids. It mainly comprises of: Coagulants, mainly fibrinogen, aid in blood clotting. Plasma proteins, such as albumin and globulin, that help maintain the colloidal osmotic pressure at about 25 mmHg.

Detailed explanation-2: -Blood is composed of blood cells suspended in blood plasma. Plasma, which constitutes 55% of blood fluid, is mostly water (92% by volume), and contains proteins, glucose, mineral ions, hormones, carbon dioxide (plasma being the main medium for excretory product transportation), and blood cells themselves.

Detailed explanation-3: -Plasma is about 92% water. It also contains 7% vital proteins such as albumin, gamma globulin and anti-hemophilic factor, and 1% mineral salts, sugars, fats, hormones and vitamins.

Detailed explanation-4: -Albumin is the most abundant of the plasma proteins. Manufactured by the liver, albumin molecules serve as binding proteins-transport vehicles for fatty acids and steroid hormones.

Detailed explanation-5: -The plasma is 90% water, with the remaining 10% consisting of ions, proteins, nutrients, wastes, and dissolved gases. Plasma contains ions, proteins, and other molecules that help to keep blood pH and osmotic balance in check, with albumin (the major protein in human plasma) taking an active influence.

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