Which of the following is a characteristic of a phagocyte?
Clumping together and adhering to damaged tissues
Digesting foreign pathogens in damaged tissues
Entering damaged tissues and releasing histamine
Transporting oxygen from the lungs to damaged tissues
The Correct Answer is B
A. While phagocytes can move to areas of damage, their primary function is not to clump together and adhere to tissues, but rather to engulf and digest foreign materials.
B. Phagocytes, such as macrophages and neutrophils, are specialized white blood cells that ingest and digest foreign pathogens, dead cells, and debris within damaged tissues. This is their main characteristic and function.
C. The release of histamine is typically associated with mast cells, not phagocytes. Histamine helps to initiate inflammatory responses, but phagocytes are involved in engulfing pathogens rather than releasing histamine.
D. Transporting oxygen from the lungs to tissues is the role of red blood cells, not phagocytes. Phagocytes are involved in immune defense, not oxygen transport.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. The jejunum is the middle part of the small intestine and is primarily involved in nutrient absorption, but it does not receive bile from the common bile duct.
B. The ileum is the final part of the small intestine, responsible for absorbing bile salts and vitamin B12, but it does not directly receive bile from the common bile duct.
C. The common bile duct empties bile into the duodenum, which is the first part of the small intestine. This allows bile to aid in the digestion and emulsification of fats.
D. The stomach is involved in the digestion of food but does not receive bile directly. Bile enters the small intestine, not the stomach
Correct Answer is A
Explanation
A. The plasma membrane, also known as the cell membrane, surrounds the entire cell and separates the cytoplasm from the external environment. It acts as a barrier, controlling the movement of substances into and out of the cell.
B. The Golgi apparatus is involved in modifying, sorting, and packaging proteins and lipids, but it does not enclose the cytoplasm. It is an internal organelle.
C. The endoplasmic reticulum (ER) is involved in protein and lipid synthesis and forms a network within the cytoplasm, but it does not enclose it. It works within the cell's internal structure.
D. The flagellum is a tail-like structure used for cell movement in some cells, but it does not enclose the cytoplasm.
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