Which of the following statements about the ventilation/perfusion (V/Q) ratio in a healthy person is true?
A) Blood flow and amount of ventilation are equal throughout the lungs.
B) The upper portion of the lungs has more ventilation than blood flow.
C) Amount of blood is greater than amount of oxygen in the lungs.
D) The lower portion of the lungs has more oxygen than perfusion.
B
You might also like to view...
You have just arrived on the scene of a motor vehicle collision where a car rolled several times at a high rate of speed. The car is on its wheels, with the restrained driver still in his seat. After ensuring that the scene is safe and gaining access to the patient, what should you do immediately if the patient is found unresponsive?
A) Establish a plan to extricate the patient B) Remove pieces of broken glass from around the patient C) Cover the patient and force the door open D) Provide manual spine motion restriction
________ is an inflammation of the membrane that lines the eye and is characterized by red swollen eyes
A) Otitis B) Choroiditis C) Tinnitus D) Conjunctivitis
______________________________ are chemicals that enable messages to pass from one cell to another.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements most accurately describes an Achilles tendon rupture?
A. it is rarely seen in adults B. it often accompanies arthritis C. it occurs with tendonitis D. it can be identified with the Thompson test