Which secretory cell of the stomach, shown in the following image, secretes pepsinogen?
Parietal cell
Mucous neck cell
Chief cell
Enteroendocrine cell
The Correct Answer is C
A. Parietal Cell: Parietal cells are responsible for secreting hydrochloric acid (HCl) and intrinsic factor, not pepsinogen. HCl activates pepsinogen into pepsin.
B. Mucous Neck Cell: Mucous neck cells secrete mucus to protect the gastric lining but do not secrete pepsinogen.
C. Chief Cell: Chief cells (also known as zymogenic cells) are specialized cells in the stomach that secrete pepsinogen, the inactive precursor of the digestive enzyme pepsin.
D. Enteroendocrine Cell: Enteroendocrine cells secrete hormones like gastrin, which regulates digestive processes, but they do not secrete pepsinogen.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Marrow: The hollow spaces within long bones contain bone marrow, which is responsible for the production of blood cells.
B. Natural killer cells: Natural killer cells are a type of lymphocyte found in the bloodstream and tissues but not directly within the hollow spaces of bones.
C. Enzymes: Enzymes are not found specifically in the hollow spaces of long bones; they are present throughout the body and are involved in metabolic processes.
D. Plasma cells: Plasma cells are derived from B cells and are primarily located in lymphatic tissue and bone marrow but do not fill the hollow spaces of long bones.
Correct Answer is C
Explanation
A. Prostate: The prostate gland contributes to the semen volume but only about 20-30%. It produces a fluid that nourishes sperm and helps transport them but is not the primary contributor to the total volume of semen.
B. Ductus Deferens: The ductus deferens (vas deferens) is a tube that transports sperm from the epididymis to the ejaculatory duct. It does not produce or contribute to the volume of semen.
C. Seminal Vesicle: The seminal vesicles contribute approximately 60% of the total semen volume. They secrete a fluid that is rich in fructose and other substances that provide energy for sperm and help in the formation of semen.
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