Which of these structures is a part of the upper respiratory tract?
A) bronchi
B) larynx
C) lungs
D) pharynx
E) trachea
Answer: D) pharynx
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Each of the following factors affects the rate of external respiration except the
A) PO2 of the alveoli. B) PCO2 of the blood. C) thickness of the respiratory membrane. D) PN2 of the alveoli. E) solubility of oxygen in plasma.
This figure shows the muscles that move the tongue. What muscle does number 1 indicate?
A. Palatoglossus B. Styloglossus C. Stylohyoid D. Hyoglossus E. Genioglossus
Which of the following are the two anticoagulants produced by the body?
A) protacyclin and heparin B) heparin and plasmin C) tissue plasminogen activator and plasmin D) antithrombin III and plasmin E) antithrombin III and heparin
Which of the following is true of acids?
a. increase [H+] to raise pH b. decrease [H+] to lower pH c. decrease [H+] to raise pH d. increase [H+] to lower pH