The left atrium receives oxygen-rich blood from the ________.
A) coronary arteries
B) venae cavae
C) pulmonary veins
D) descending aorta
E) pulmonary arteries
Ans: C) pulmonary veins
You might also like to view...
In the middle ear, the:
a. incus rests against the organ of Corti b. tympanic membrane rests against the stapes c. tympanic membrane rests against the incus d. stapes rests against the oval window
The group of lymphoid stem cells that migrates to the thymus and divides repeatedly produces which type(s) of lymphocytes?
A) B cells B) T cells C) NK cells D) T cells and B cells E) B cells and NK cells
Heart disease present at birth is known as ____________________ heart disease
Fill in the blank(s) with correct word
The cardiac electrical impulse normally begins spontaneously in the SA node because
A. of the superior location of the SA node in the right atrium. B. the SA node is the only area of the heart capable of spontaneous depolarization. C. of the rich sympathetic innervation of the SA node. D. this area produces action potentials more rapidly than any other portion of the conduction system. E. of action potentials from the cardioregulatory center.