The fundamental purpose of Vitamin A in the body is multi-faceted and integral to the overall health and functioning of the human system. An essential fat-soluble nutrient, it plays a crucial role in various biological processes. Foremost among its functions is the maintenance of normal vision, especially in dim light.
Vitamin A is equally important in cell growth and differentiation, where it assists in the formation and maintenance of the heart, lungs, kidneys, and other vital organs. In the immune system, this essential nutrient helps to bolster the body’s defenses against infections by increasing the lymphocytic responses against disease-causing antigens.
Furthermore, it serves as an indispensable factor in maintaining the health and integrity of the skin and mucous membranes, particularly in the respiratory, gastrointestinal, and urinary tracts, hence acting as a primary barrier against bacteria and pathogens.
In the reproductive system, both males and females need Vitamin A for normal growth and development of embryos during pregnancy, as well as spermatozoa production in males.
Lastly, Vitamin A acts as a regulator of gene expression by activating various genes through its role as a precursor of retinoic acid. This facilitates cellular communication and ensures proper functioning of the human body.
#1. What is the fundamental purpose of Vitamin A in the human body?
C is the answer. The text states that the fundamental purpose of Vitamin A is integral to the overall health and functioning of the human system.
#2. How does Vitamin A help in maintaining normal vision?
B is the answer. According to the text, among the essential functions of Vitamin A is the maintenance of normal vision, especially in the dim light situation.
#3. Where is Vitamin A active during cell growth and differentiation?
B is the answer. The text asserts that Vitamin A assists in the formation and maintenance of the heart, lungs, kidneys, and other vital organs.
#4. How does Vitamin A contribute to the immune system?
C is the answer. The text elucidates that Vitamin A helps to bolster the body’s defenses against infections.
#5. What is the role of Vitamin A in the reproductive system?
C is the answer. According to the text, Vitamin A is needed for the normal growth and development of embryos during pregnancy and spermatozoa production in males.
#6. In relation to gene expression, how does Vitamin A contribute to its regulation?
A is the answer. According to the text, Vitamin A acts as a regulator of gene expression by activating various genes through its role as a precursor of retinoic acid. This facilitates cellular communication and ensures proper functioning of the human body.
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