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

Anatomy & Physiology

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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

Anatomy & Physiology

Heart disease present at birth is known as ____________________ heart disease

Fill in the blank(s) with correct word

Anatomy & Physiology

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.

Anatomy & Physiology

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

Anatomy & Physiology