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.
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Related Questions
Correct Answer is D
Explanation
A. Epididymis: The epididymis is where sperm mature and are stored. It is not cut during a vasectomy.
B. Tunica albuginea: This is the connective tissue surrounding the testis, not part of the sperm-carrying duct system.
C. Efferent ductules: These ducts transport sperm from the testis to the epididymis, but they are not cut during a vasectomy.
D. Ductus deferens: The ductus deferens (vas deferens) is the tube that carries sperm from the epididymis to the ejaculatory duct. It is cut and sealed during a vasectomy, preventing sperm from reaching the urethra.
Correct Answer is C
Explanation
A. Endocardium: The endocardium is the innermost layer of the heart wall, lining the chambers and valves, and is not in contact with pericardial fluid.
B. Fibrous pericardium: This is the outermost layer of the pericardium but is not part of the heart wall. It provides protection and support but does not come into direct contact with pericardial fluid.
C. Epicardium: The epicardium is the outer layer of the heart wall and is in direct contact with pericardial fluid, which is found between the epicardium and the pericardium.
D. Myocardium: The myocardium is the middle muscular layer responsible for heart contractions and is not in contact with pericardial fluid.
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