These T cells recognize an antigen and initiate a rapid response to the antigen:
Killer T cells
Regulatory T cells
Memory T cells
Thrombocytes
The Correct Answer is A
A. Killer T cells (also known as cytotoxic T cells) recognize and bind to antigens presented by infected cells. They initiate a rapid immune response to destroy the infected or cancerous cells directly.
B. Regulatory T cells help modulate the immune response by preventing overreaction or autoimmunity, but they do not directly initiate a rapid response to antigens.
C. Memory T cells remember previously encountered antigens and respond quickly upon re-exposure to the same pathogen, but they do not initiate the initial response—they are involved in secondary immune responses.
D. Thrombocytes (also known as platelets) are involved in blood clotting, not in the immune response to antigens.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Chyle is a milky fluid formed by the combination of fat globules and lymph. It is absorbed by lacteals (specialized lymphatic vessels) in the small intestine and transports dietary fats to the lymphatic system.
B. Plasma is the liquid component of blood, not a mixture of fat and lymph.
C. Lymph is the clear fluid that circulates in the lymphatic system, but it is not specifically mixed with fats like chyle.
D. Lacteal refers to the lymphatic vessels in the small intestine that absorb fats, but it is not the name of the fluid itself. The fluid is called chyle.
Correct Answer is B
Explanation
A. Lymphatic capillaries do contain cells, specifically endothelial cells that form the walls of the capillaries.
B. Lymphatic capillaries are blind-ended, meaning they have an open end that begins the collection of interstitial fluid (lymph), unlike blood capillaries, which form continuous loops.
C. Lymphatic capillaries are highly permeable to water, solutes, and larger particles, which is one reason they are efficient at collecting interstitial fluid.
D. Lymphatic capillaries do not contain a muscular layer. Instead, they rely on the surrounding tissues and valves to help move lymph through the system
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