Damage to thymus in a child may lead to :
a reduction in hemoglobin content of blood
a reduction in stem cell production
loss of antibody mediated immunity
loss of cell mediated immunity
The Correct Option is D
Solution and Explanation
The thymus is a primary organ of the immune system where T cells (a type of lymphocyte) mature and develop. Cell-mediated immunity, which involves the activation of T cells to combat intracellular pathogens and abnormal cells (such as cancer cells), is primarily dependent on the proper functioning of the thymus. Damage to the thymus can disrupt the development of functional T cells, leading to a loss of cell-mediated immunity.
So, the correct option is (D): loss of cell mediated immunity
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Concepts Used:
Chemical Coordination and Integration - Hormones
Hormones are chemical messengers that are released directly into the bloodstream, where they are carried to organs and tissues throughout the body to perform their tasks. Hormones are released by the body's endocrine glands.
Functions of Hormones
Following are some important functions of hormones:
- Food metabolism.
- Growth and development.
- Controlling thirst and hunger.
- Maintaining body temperature.
- Regulating mood and cognitive functions.
- Initiating and maintaining sexual development and reproduction.
Types of Hormones
To regulate various functions, different types of hormones are produced in the body. They are classified as follows:
- Peptide Hormones: Peptide hormones are composed of amino acids and are soluble in water.
- Steroid Hormones: Unlike peptide hormones, steroid hormones are fat-soluble and are able to pass through a cell membrane.
List of Important Hormones
- Cortisol
- Estrogen
- Melatonin
- Progesterone
- Testosterone