Deeper full-thickness burns usually result in skin protein becoming denatured and hard, forming a firm, leather-like covering that is referred to as:

Which medication is an anticholinergic bronchodilator?

a. Ipratropium bromide b. Vilanterol c. Salmeterol d. Terbutaline

Letter I on the figure represents the ________, which branch off the tertiary bronchi within the lungs.

Fill in the blank(s) with the appropriate word(s).