Modifiers that affect heart rate are _______.

A) agonists
B) antagonists
C) inotropic
D) chronotropic


Ans: D) chronotropic

Anatomy & Physiology

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Central organ of the lymphatic system is:

(a) tonsils (b) thymus (c) spleen (d) lymph nodes

Anatomy & Physiology

Brain metabolism may be best studied by ________.

A. computed tomography B. magnetic resonance imaging C. positron-emission tomography D. electroencephalography

Anatomy & Physiology

Which system removes excess carbon dioxide from the blood?

A) urinary system B) respiratory system C) digestive system D) cardiovascular system E) endocrine system

Anatomy & Physiology

Rigor mortis occurs because

A. the body temperature drops. B. there are no brain waves. C. there are no nerve signals. D. there is no ATP to relax the muscles.

Anatomy & Physiology