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. Bone marrow: The bone marrow is primarily responsible for the production of blood cells, including red blood cells, rather than their removal.
B. Tonsils: The tonsils are part of the immune system and help filter pathogens but are not primarily involved in removing old red blood cells.
C. Thymus: The thymus is involved in the maturation of T-lymphocytes (T-cells) and does not have a role in filtering blood or removing red blood cells.
D. Spleen: The spleen filters the blood, removes old and damaged red blood cells, and helps in the immune response by filtering pathogens.
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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