Concept explainers
Introduction:
The two major components of blood are the blood cells and fluid plasma. The blood cells make up about 45% of the blood composition, and the rest of the 55% of the blood is made up of plasma. The blood cells are of three types that are red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).
Answer to Problem 1RAC
The correct answer is option (e) all of these are correct.
Explanation of Solution
Explanation/justification for the correct answer:
Option (e) all of these are correct. Blood functions to maintain osmolarity through ions and electrolytes, protects against foreign substances through immune cells, contains platelets for clot formation and maintains body temperature. So, the correct answer is option (e).
Explanation for incorrect answer:
Option (a) clot formation. Blood contains platelets that are responsible for the formation of a clot that stops bleeding, but that is not the only function of blood. So, this is an incorrect option.
Option (b) protection against foreign substances. Blood contains white blood cells and immune cells that function to protect the body against infections and maintains immunity, but that is not the only function of blood. So, this is an incorrect answer.
Option (c) maintenance of body temperature. The blood maintains body temperature by the transport of hormones that helps to regulate body temperature through vasoconstriction and vasodilatation, but that is not the only function of blood. So, this is an incorrect answer.
Option (d) regulation of pH and osmosis. Blood helps to maintain pH and osmolarity by providing the ions that balance the pH and water-electrolyte balance in the body, but that is not the only function of blood. So, this is an incorrect answer.
The blood helps to maintain pH and osmolarity; it helps in protection, maintenance of body temperature, and helps in clot formation. Hence, the correct answer is option (e) all of these are correct.
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Chapter 19 Solutions
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