What triggers the release of parathyroid hormone (PTH)?

A) decreasing sodium ion concentration of the blood
B) increasing calcium ion concentration of the blood
C) increasing potassium ion concentration of the blood
D) decreasing calcium ion concentration of the blood


Answer: D

Anatomy & Physiology

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The time of day most hazardous for heart attacks is ________.

A) morning B) noontime C) evening D) during sleep

Anatomy & Physiology

Activated complement does not

a. promote localized vasodilation b. formation membrane-attack complexes c. activate kinins d. stimulate interferon production e. stimulate local mast cell activity

Anatomy & Physiology

This figure illustrates changes in blood pressure when _____ feedback mechanisms are in control

A. positive B. negative

Anatomy & Physiology

This mineral is a cofactor of the carbonic anhydrase enzyme system.

A) chloride B) calcium C) copper D) zinc E) magnesium

Anatomy & Physiology