Q74 - Compensatory Cardiovascular Responses to Acute Hemorrhage
A man had lost approximately 700 mL of blood in a severe injury of a major artery in a motorcycle accident. At the time of accident, his blood pressure was 90/50 mmHg. Several physiological changes should be expected in response to hemorrhage.
Using the information and data, determine which of the statements are true or which are false.
A. Oxygen affinity of hemoglobin in peripheral tissues was increased.
B. Total peripheral resistance was increased.
C. Hyperpolarization occurred in the cells of the sinoatrial node.
D. Vasoconstriction occurred in the brain and in the coronary arteries.
Question reproduced from IBO 2016, Theoretical Paper B, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)