Pyrogens are chemicals produced by bacteria or cells of the immune system. Which part of the brain is affected by pyrogens?
Pons
Cerebral cortex
Hypothalamus
Amygdala
The Correct Answer is C
A. Pons: The pons is involved in regulating the rate and depth of breathing but is not the primary site affected by pyrogens for temperature regulation.
B. Cerebral cortex: The cerebral cortex is responsible for higher-order functions like reasoning and sensory perception but does not directly regulate body temperature in response to pyrogens.
C. Hypothalamus: The hypothalamus acts as the body’s thermostat and is directly affected by pyrogens, leading to the elevation of body temperature (fever) as part of the immune response.
D. Amygdala: The amygdala is primarily involved in emotion regulation and does not play a direct role in temperature regulation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. This allows for rapid exchange of oxygen and nutrients: Capillaries have thin walls (one cell thick) to facilitate the rapid diffusion of gases (oxygen and carbon dioxide), nutrients, and waste products between blood and tissues.
B. This allows for red blood cell formation to occur: Red blood cells are formed in the bone marrow, not in capillaries.
C. There is no blood pressure within the capillaries: There is still blood pressure within capillaries, although it is lower than in arteries, so this is incorrect.
D. Blood does not travel through capillaries: Blood does indeed travel through capillaries as part of the circulatory system.
Correct Answer is D
Explanation
A. Eosinophil: Eosinophils are involved in allergic reactions and parasitic infections, but they are not responsible for B and T cell functions.
B. Basophil: Basophils are involved in inflammatory responses, particularly releasing histamine, but do not include B or T cells.
C. Monocyte: Monocytes are large white blood cells that develop into macrophages but do not include B or T cells.
D. Lymphocyte: Lymphocytes are a subtype of white blood cells that include B cells (which produce antibodies) and T cells (which are involved in cell-mediated immunity), making this the correct answer.
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