All of the following clinical findings typically accompany a 40% loss of circulating blood volume except_______________?
Show answer Hide answer
Answer: C. A decrease in the heart rate
Explanation
A massive 40% loss of circulating blood volume triggers intense sympathetic nervous system compensation. This compensatory reflex maintains blood pressure by increasing myocardial contractility and heart rate. Therefore, tachycardia occurs rather than a decrease in heart rate during acute hypovolemia. Hemorrhagic shock leads to critical reductions in venous return and cardiac stroke volume. Baroreceptors detect falling arterial pressure and stimulate sympathetic adrenergic nerve pathways. Compensatory mechanisms redistribute blood flow to vital organs like the brain and heart.
Emergency medical personnel monitor vital signs to detect early signs of hemorrhagic shock. Recognizing compensatory tachycardia prevents delayed resuscitation in severely injured trauma patients. Restoring circulating blood volume remains the primary therapeutic goal in hypovocemic shock. Blood pressure decreases significantly as compensatory mechanisms fail during severe fluid loss. Central venous pressure drops due to diminished venous return and inadequate circulating volume. Urine output decreases sharply as renal perfusion is severely compromised during shock states.
Related questions
Q1. All of the listed conditions contribute to excessive bleeding during tooth extraction except _______________?
Show answer Hide answer
Answer: C. Anti thrombin – III deficiency
Antithrombin III deficiency is a hypercoagulable state predisposing patients to thrombotic events. Deficiency of this anticoagulant protein increases clotting risks rather than bleeding tendencies. Patients suffer from v...
Q2. All characteristics of exudates are correct, except__________?
Show answer Hide answer
Answer: B. It has a low fibrin content
An exudate is an inflammatory fluid featuring substantial amounts of fibrinogen and high proteins. Transudates typically display a low protein concentration and lack significant amounts of fibrinogen molecules. The corre...
Q3. Analysis of a child’s CSF reveals slightly increased or normal PMN cells, elevated lymphocytes, absent mycotic growth, normal or elevated protein, and normal glucose levels, pointing to the probable diagnosis of____________?
Show answer Hide answer
Answer: B. Viral meningitis
Viral meningitis typically presents with elevated lymphocytes and normal glucose levels. Cerebrospinal fluid analysis reveals normal or slightly increased protein concentrations. Mycotic growth is absent because the etio...
Q4. Which statement is accurate regarding multiple endocrine neoplasia (MEN) syndromes ?
Show answer Hide answer
Answer: D. All of the above
Multiple endocrine neoplasia syndromes involve tumors or hyperplasia of multiple endocrine glands. Parathyroid gland hyperplasia leads to primary hyperparathyroidism in affected individuals. Pituitary and pancreatic isle...
Q5. A patient presenting with a bleeding disorder characterized by prolonged bleeding time and normal clotting time is suffering from________________?
Show answer Hide answer
Answer: D. Idiopathic thrombocytopenic purpura
Idiopathic thrombocytopenic purpura involves an autoimmune destruction of circulating blood platelets in the body. A significant drop in platelet counts directly impairs primary hemostasis causing prolonged bleeding time...
Q6. All of the following blood-borne infections can be transmitted through transfusions except ______________?
Show answer Hide answer
Answer: B. Leukemia
Leukemia is a neoplastic malignancy of white blood cells originating in bone marrow. It is not an infectious agent and cannot be transmitted via blood transfusions. Infectious pathogens, by contrast, are readily transmis...