24. Which of the following is an example of an autocrine regulator? (A) insulin (B) prostaglandins (C) nitric oxide (D) all of the above (E) none of the above

7. What is the function of the cilia in the trachea and bronchi? (A) to sweep air into and out of the lungs (B) to increase the surface area for gas exchange (C) to vibrate when air is exhaled to produce sounds (D) to dislodge food that may have slipped past the epiglottis (E) to sweep mucus with trapped particles up and out of the respiratory tract

24. Which of the following is an example of an autocrine regulator?

(A) insulin

(B) prostaglandins

(C) nitric oxide

(D) all of the above

(E) none of the above

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