Where are the respiratory control areas located?
Hypothalamus
Pons and medulla oblongata
Alveoli
Cerebral cortex
The Correct Answer is B
A. Hypothalamus -The hypothalamus regulates autonomic functions like temperature, but not primary breathing rhythms.
B. Pons and medulla oblongata -The medulla sets the basic rhythm of breathing, and the pons fine-tunes it.
C. Alveoli -Alveoli are sites of gas exchange, not neural control.
D. Cerebral cortex -The cortex allows voluntary control of breathing but is not the main respiratory control center.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is {"dropdown-group-1":"D"}
Explanation
Correct answer: Eosinophil
Eosinophils characteristically have a bilobed nucleus and large, refractile orange-red cytoplasmic granules that stain with eosin; those features identify the pictured granulocyte as an eosinophil (cells involved in parasitic defense and allergic responses).
Correct Answer is B
Explanation
A. Converts fibrinogen to fibrin: that reaction is carried out by thrombin, not plasmin.
B. Breaks down fibrin, dissolving the clot: plasmin is the primary enzyme of fibrinolysis, cleaving fibrin to dissolve formed clots.
C. Triggers the extrinsic clotting mechanism, leading to clot formation: the extrinsic pathway is initiated by tissue factor (factor III) interacting with factor VII, not plasmin.
D. Inactivates thrombin, slowing clot formation: plasmin’s main role is fibrin breakdown; thrombin is primarily regulated by antithrombin, thrombomodulin–protein C systems. (Plasmin can degrade some clotting proteins but it is not described as the main inactivator of thrombin.)
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