What material is found in the hollow spaces of long bones?
Marrow
Natural killer cells
Enzymes
Plasma cells
The Correct Answer is A
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Prostate: The prostate gland produces seminal fluid that nourishes and transports sperm but does not store mature sperm. Its main function is to contribute to the formation of semen.
B. Seminal Vesicle: The seminal vesicles produce a significant portion of the seminal fluid but do not store sperm. Instead, they provide nutrients for sperm and help form semen.
C. Epididymis: The epididymis is a coiled tube located at the back of each testis where sperm mature and are stored until ejaculation. It plays a crucial role in the maturation process of sperm.
D. Bulbourethral: The bulbourethral glands (or Cowper's glands) secrete a pre-ejaculate fluid that lubricates the urethra but do not store sperm.
Correct Answer is B
Explanation
A. Superior vena cava: The superior vena cava carries deoxygenated blood back to the heart, and pressure here is low.
B. Ascending aorta: The ascending aorta is where blood is ejected from the left ventricle, leading to the highest pressure in the circulatory system.
C. Abdominal aorta: While the pressure is still high in the abdominal aorta, it is lower compared to the ascending aorta.
D. Pulmonary trunk: The pulmonary trunk carries blood to the lungs, and the pressure is lower compared to the systemic circulation.
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