The heart muscle lies within a space in the thoracic cavity called the:
A. mediastinum.
B. hemithorax.
C. pericardium.
D. endocardium.
Ans: A. mediastinum.
Anatomy & Physiology
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When placed in water, an inorganic compound dissociates 99 percent, forming hydrogen ions and anions. This compound would be a
A) strong base. B) weak base. C) strong acid. D) weak acid. E) salt.
Anatomy & Physiology
Each kidney has about ________ nephrons
A) 100,000 B) 500,000 C) 1 million D) 1.25 million E) 5 million
Anatomy & Physiology
The buccinator muscle is innervated by the __________.
A. vagus nerve B. facial nerve C. trigeminal nerve D. abducens nerve
Anatomy & Physiology
Antidiuretic hormone (ADH) acts upon the
A. descending loop of Henle. B. distal convoluted tubule. C. glomerulus. D. collecting duct.
Anatomy & Physiology