What is the role of the hypothalamus in thermoregulation?
It regulates heat production through muscle contraction.
It increases blood flow to the skin in cold environments.
It acts as the body's temperature regulation center.
It directly stimulates sweat glands to produce sweat.
The Correct Answer is C
A. It regulates heat production through muscle contraction.: The hypothalamus coordinates responses (e.g., shivering) that increase heat production, but it does so as an integrative center rather than directly contracting muscles.
B. It increases blood flow to the skin in cold environments.: In cold environments the hypothalamus typically reduces skin blood flow to conserve heat; increasing skin blood flow is a heat-loss response.
C. It acts as the body's temperature regulation center.: The hypothalamus integrates thermal sensory input and orchestrates autonomic and behavioral responses to maintain core temperature.
D. It directly stimulates sweat glands to produce sweat.: The hypothalamus triggers sympathetic pathways that cause sweating, but it does not directly innervate sweat glands itself.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Monocytes:Monocytes differentiate into macrophages and dendritic cells that perform phagocytosis and antigen presentation but do not produce antibodies.
B. Neutrophils:Neutrophils are short-lived phagocytic cells that ingest and destroy pathogens; they do not produce antibodies.
C. B lymphocytes:B lymphocytes (B cells) differentiate into plasma cells that secrete antibodies specific to antigens, making them the primary source of antibody production.
D. T lymphocytes:T lymphocytes are involved in cell-mediated immunity, regulating immune responses and directly killing infected cells but not in producing antibodies.
Correct Answer is D
Explanation
A. The hypothalamus is posterior to the pituitary gland:The hypothalamus is actually superior (above) and connected to the pituitary; it is not located posterior to the pituitary.
B. The hypothalamus is located within the sella turcica:The sella turcica is the bony depression in the sphenoid bone that houses the pituitary gland, not the hypothalamus, which lies superior to it in the diencephalon.
C. The pituitary gland is superior to the hypothalamus:The pituitary lies inferior to the hypothalamus; it is not superior.
D. The pituitary gland is connected to the hypothalamus by the infundibulum:The infundibulum (pituitary stalk) physically connects the hypothalamus to the pituitary, allowing neural and vascular communication between them.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.