Which cells within the alveoli form a single thin epithelial layer, located very near the capillaries, ensuring efficient gas exchange occurs between the air and the blood?
A. alveolar macrophage
B. type I alveolar cells
C. type II alveolar cells
D. goblet cells
Ans: B. type I alveolar cells
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If a cell were placed in a solution of 0.15 M NaCl, it would shrink.
Answer the following statement true (T) or false (F)
Troponin
a. binds with calcium to allow sarcomere shortening b. breaks down myosin cross bridges c. is an enzyme in the sarcomere d. forms the boundaries of a sarcomere e. has an ATPase site
Children receive a vaccine to protect them against _________________________, a disease characterized by severe coughing attacks.?
Fill in the blank(s) with correct word
Which skull canal contains blood vessels that drain blood from the skull?
A. External auditory meatus B. Nasolacrimal canal C. Foramen ovale D. Jugular foramen E. Carotid canal