Which of the following structures encloses the cytoplasm?
Plasma membrane
Golgi apparatus
Endoplasmic reticulum
Flagellum
The Correct Answer is A
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. The diaphysis is the shaft of a long bone, the central part that extends between the two epiphyses (ends). It is primarily composed of compact bone and houses the bone marrow.
B. The periosteum is a dense layer of connective tissue that covers the outer surface of bones, except at the joints. It does not represent the shaft of the bone.
C. The cortex refers to the outer layer of the bone, specifically the compact bone that surrounds the spongy bone in the diaphysis. It is not synonymous with the shaft.
D. Osteoid is the organic matrix of bone tissue, composed of collagen and other proteins, but it does not refer to the shaft of a bone.
Correct Answer is C
Explanation
A. The primary follicle is an earlier stage in the development of the ovarian follicle, not the structure that forms after ovulation.
B. The zygote is the result of fertilization, formed when the sperm and egg unite, but it does not form from the follicle after ovulation.
C. The corpus luteum forms from the remains of the follicle after ovulation. It secretes progesterone to support early pregnancy or prepares to degenerate if pregnancy does not occur.
D. The oocyte is the egg cell itself, which is released during ovulation, but it is not the structure that forms from the follicle after ovulation.
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