Atelectasis occurs when:
A) the alveoli are overinflated and rupture.
B) a deficiency of surfactant causes alveolar collapse.
C) deoxygenated blood diffuses across the alveoli.
D) surface tension on the alveolar walls is decreased.
Answer: B) a deficiency of surfactant causes alveolar collapse.
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An Olympic sprinter readies for a race. After the sound of the starting gun, he propels himself forward from the starting block and immediately grimaces in pain, grabbing for the back of his thigh. Within 48 hours he begins noticing extensive bruising on the back of his thigh extending into the back of the knee. He now has difficulty rising from a seated position and flexing his knee. Bending at the waist generates more pain. Which muscle is likely injured?
A. Gluteus maximus B. Popliteus C. Biceps femoris D. Gastrocnemius E. Iliopsoas
Each epididymis emerges from the bottom of a testis
Indicate whether the statement is true or false
A female horse that has not yet been bred is a _____________ horse
Fill in the blank(s) with correct word
All chemical digestion is essentially just hydrolysis reactions.
Answer the following statement true (T) or false (F)