Which type of cell breaks down bone tissue?

A. Osteoclast
B. Adipocyte
C. Mast cell
D. Macrophage
E. Stem cell


Answer: A

Anatomy & Physiology

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Choose a correct sequence of blood flow during one pass through the heart and lungs (some steps may have been omitted):

a. Right atrium?bicuspid valve?pulmonary vein b. Aortic valve?right ventricle?lung c. Lung?pulmonary artery?left atrium d. Right ventricle?bicuspid valve?aortic valve e. None of the above sequences are correct

Anatomy & Physiology

Lungs in fish originally evolved as a simple evagination of the

a. gills. b. integument. c. buccal cavity. d. pharynx. e. digestive system.

Anatomy & Physiology

The opposite of extension is ________.

A. pronation B. inversion C. protraction D. flexion E. elevation

Anatomy & Physiology

Stimulation of ?1 receptors present on smooth muscle cells of blood vessels to the skin by norepinephrine results in:

A) vasodilation. B) bronchodilation. C) vasoconstriction. D) sweating.

Anatomy & Physiology