In the cardiac cycle,

A. the right atrium and the right ventricle contract simultaneously.
B. the left atrium contracts before the right atrium.
C. all four chambers of the heart contract at the same time.
D. all four chambers of the heart are in diastole at the same time.


D

Anatomy & Physiology

You might also like to view...

Which of the following is not considered a reproductive duct of the male reproductive system?

a. epididymis b. vas deferens c. seminiferous tubule d. urethra

Anatomy & Physiology

Myasthenia gravis is a collection of muscle disorders that cause muscle fatigue and weakness. What is the major mechanism?

A. overproduction of acetylcholinesterase B. autoimmune destruction of nicotinic acetylcholine receptors C. demyelination of axons in motor pathways D. autoimmune destruction of L-type Ca2+ channels. E. a tumor that overproduces acetylcholine

Anatomy & Physiology

The source of blood carried to capillaries in the myocardium would be the ________.

A) coronary sinus B) fossa ovalis C) coronary arteries D) coronary veins

Anatomy & Physiology

The epiglottis is a malignant tumor, which sometimes grows in the throat

Indicate whether the statement is true or false

Anatomy & Physiology