During which phase of the cardiac cycle do the semilunar valves open?
Correct answer: C. Ventricular ejection
- A. Atrial systole
- B. Isovolumetric relaxation
- C. Ventricular ejection
- D. Passive ventricular filling
Explanation
The aortic and pulmonary valves open when ventricular pressure rises above the pressure in the aorta and pulmonary artery. This allows blood to leave the ventricles during ventricular ejection. They remain closed during isovolumetric phases.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Cardiovascular System
The cardiovascular system covers the chambers, valves and major vessels of the heart, the cardiac cycle, conduction pathway, blood pressure and the circulation through pulmonary and systemic circuits. It also explains artery, vein and capillary structure, exchange at capillary beds, and how the cardiac cycle differs from general blood flow.
Practise Cardiovascular System
40 free Cardiovascular System MCQs from Anatomy and Physiology for Nursing, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Anatomy and Physiology for Nursing questions like this
Anatomy and Physiology for Nursing is on 4 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Cardiovascular System questions
What does the P wave on a normal electrocardiogram represent?
Which structure normally acts as the primary pacemaker of the heart?
Which layer of a blood vessel contains smooth muscle that changes the vessel diameter?
A patient has repeated blood pressure readings of 170/100 mmHg. Which response is expected from the arterial baroreceptors?
A patient with severe dehydration has a reduced circulating blood volume. Which renal response helps restore arterial pressure?
At the venous end of a normal capillary, which force mainly draws fluid back into the capillary?