Humans have ________ pairs of ribs.

A) 2
B) 6
C) 10
D) 12
E) 24


D) 12

Anatomy & Physiology

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Choose the answer that best describes HCO3-.

A) a bicarbonate ion B) common in the liver C) a weak acid D) a proton donor

Anatomy & Physiology

The deepest muscle of the abdominal wall is the ________.

A. rectus abdominis B. internal oblique C. pectoralis minor D. latissimus dorsi E. transverse abdominal

Anatomy & Physiology

The lungs, trachea, and nasal passages are part of the ________ system

A) skeletal B) cardiovascular C) integumentary D) respiratory

Anatomy & Physiology

The clinical definition of the hematocrit refers to the percentage of

A.  erythrocytes in the blood. B.  leukocytes in the blood. C.  platelets in the blood. D.  plasma in the blood. E.  all formed elements in the blood.

Anatomy & Physiology