Which of the following induces renin secretion, constricts afferent arterioles, and reduces GFR and urine volume?
A) Norepinephrine
B) Aldosterone
C) Angiotensin II
D) Parathyroid hormone
E) Antidiuretic hormone
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Question 2) When the ventricles relax, the ________ valve prevents backflow of blood into the left ventricle.
A) aortic B) left AV C) pulmonary D) mitral E) right AV
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Question 3) Most of the ventricle filling occurs ________.
A) when the AV valve is closed
B) during atrial diastole
C) during isovolumetric contraction
D) during atrial systole
E) during ventricular systole
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Question 4) Which of the following is more effective in producing bronchodilation?
A) Thyroxine
B) Norepinephrine
C) Nicotine
D) Muscarine
E) Acetylcholine
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Question 5) The overall purpose of the countercurrent exchange system is to ________.
A) supply nutrients and oxygen to the renal cortex
B) remove metabolic wastes from the renal cortex
C) supply salt and urea to the renal medulla
D) supply nutrients and oxygen to the renal medulla
E) remove metabolic wastes from the renal medulla
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Question 6) Which is the correct sequence of events of the cardiac cycle?
A) Ventricular filling isovolumetric relaxation ventricular ejection isovolumetric contraction
B) Ventricular filling isovolumetric relaxation isovolumetric contraction ventricular ejection
C) Ventricular filling isovolumetric contraction isovolumetric relaxation ventricular ejection
D) Ventricular filling ventricular ejection isovolumetric contraction isovolumetric relaxation
E) Ventricular filling isovolumetric contraction ventricular ejection isovolumetric relaxation
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Question 7) Propranolol, a beta-blocker, is typically used to ________.
A) produce bronchodilation
B) decrease heart rate
C) produce vasoconstriction of the coronary arteries
D) increase heart rate
E) produce vasodilation of blood vessels of skeletal muscle
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Question 8) The countercurrent multiplier recaptures ________ and is based on fluid flowing in the ________ direction in two adjacent tubules.
A) potassium; same
B) sodium; opposite
C) sodium; same
D) calcium; opposite
E) calcium; same
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Question 9) Mitral valve prolapse (MVP) generates a murmur associated with the ________ heart sound that occurs when the ________.
A) dupp (S2); atria relax
B) dupp (S2); ventricles relax
C) lubb (S1); ventricles contract
D) lubb (S1); ventricles relax
E) lubb (S1); atria contract
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Question 10) Which of the following is not under dual control of the ANS?
A) Pupil diameter
B) Heart rate
C) Salivary gland activity
D) Gastrointestinal motility
E) Adrenal medulla activity
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