Which of the following best describes the insertion of the extensor digitorum?
A. It indirectly inserts on all digits of the hand except the thumb.
B. It directly inserts on the index finger only.
C. It directly inserts on all digits of the hand except the thumb.
D. It indirectly inserts on all digits of the hand.
E. It directly inserts on all digits of the hand.
Answer: A
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Which of the following statements concerning iron is incorrect?
a. iron is found in the heme portion of the hemoglobin molecule. b. iron is converted into bilirubin upon erythrocyte degradation. c. iron readily combines reversibly with O2. d. diets deficient in iron can lead to anemia. e. iron is not adequately absorbed from the digestive tracts in pernicious anemia.
The delivery of oxygen and nutrients to the tissues of the body is accomplished through the ________ circulation.
A. systemic B. peripheral C. hepatic D. pulmonary
Which of the following is incorrect if blood flow to an area of the lungs is reduced while airflow remains normal?
a. The concentration of CO2 in this area decreases. b. The change in CO2 concentration causes smooth muscles of the local airways to relax. c. The change in CO2 concentration leads to increased resistance of local airways. d. The change in O2 concentration leads to dilation of local blood vessels. e. The change in O2 concentration leads to decreased vascular resistance.
The ________ carry (carries) oxygen-rich blood between the lungs and heart
A) bronchial arteries B) pulmonary veins C) pulmonary trunk D) pulmonary arteries