Considering the left ventricle, why does isovolumetric ventricular contraction occur during ventricular systole?
A) The ventricle needs to pressurize the blood to close the aortic valve.
B) Ventricular pressure is greater than atrial pressure so the ventricle cannot eject blood.
C) The bicuspid valve needs time to shut before the ventricle can eject blood.
D) Aortic pressure is higher than ventricular pressure and the ventricle must pressurize the blood to open the aortic valve.
E) The ventricle is still filling with blood and therefore cannot eject blood during this time.
D
You might also like to view...
Describe the endocrine events that help maintain pregnancy after the blastocyst implants
What will be an ideal response?
Which of the following is not true of villi?
A. They are lined with simple columnar epithelium with microvilli. B. They are found in the small and large intestines. C. They are found in the mucosa. D. They contain blood vessels and lacteals. E. All of these are true of villi.
The regions of the penis are ________
A) the body and the glans B) the root and the glans C) the root and the body D) the root, the body, and the glans
Prolactin is secreted during pregnancy to stimulate milk synthesis so that milk will be available by the time the infant is born.
Answer the following statement true (T) or false (F)