Bio 669 Exam 2 Questions And Answers | 2024 Version With 100% Correct Answers

Which of the following is incorrect regarding the isometric contraction phase of the cardiac cycle? a. Blood does not flow through the heart at this time. b. The atria are contracting c. The valves are closed d. It occurs during ventricular systole {Ans: b. The atria are contracting}Diabetic ketoacidosis occurs most directly as a result of _____ leading to increased lipolysis and formation of ketone bodies. a. Increased stress hormones b. Profound insulin insufficiency c. Insulin resistance with a mild decrease in insulin d. Hyperglycemia {Ans: b. Profound insulin insufficiency}Natriuretic peptides act by: a. Stimulates secretion of Na+ (and thus decreases urine volume) from the kidneys b. Stimulated the release of Na+ (thus increases urine volume) from the kidneys c. Increases vascular smooth muscle contraction (vasoconstriction) d. Stimulates increased heart rate, contractility, and cardiac output {Ans: b. Stimulate the release of Na+ (thus increasing urine volume) from the kidneys}The ____ is an opening for venous drainage to empty into the right atrium: A. Aortic ostia B. Circumflex vein C. Great cardiac vein D. Coronary sinus {Ans: D. Coronary sinus}Myocardial hibernation is best described as: A. Myocardial cells that are persistently ischemic and undergo metabolic adaptation to