Platelets release ________, a chemical vasoconstrictor that contributes to the vascular spasm.

A. heparin
B. thromboplastin
C. serotonin
D. prostacyclin
E. thrombin


Answer: C

Anatomy & Physiology

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Indicate whether the statement is true or false

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Which bone does not contain a paranasal sinus?

A. Sphenoid bone B. Maxilla C. Mandible D. Frontal bone E. Ethmoid bone

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Which sinus does the number 1 indicate?

A. Ethmoidal sinus B. Anterior sinus C. Sphenoidal sinus D. Maxillary sinus E. Frontal sinus

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Describe ATP

A) ATP consists of an adenine molecule with three potassium ions attached. B) ATP consists of an adenosine molecule with three phosphate groups attached. C) ATP consists of an adenosine, a thymine, and a pyrimidine molecule linked together. D) ATP consists of an adenine molecule with three phosphate groups attached. E) ATP consists of an adenosine with three potassium ions attached.

Anatomy & Physiology