The esophagus differs from the rest of the alimentary tract in that it possesses only a loose layer of tissue called the ________.
A. adventitia
B. muscularis
C. mucosa
D. serosa
Answer: A
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What is an aponeurosis?
A. A flat sheet of connective tissue used for muscle insertion B. A round tendonlike structure attaching muscle to bone C. A thin layer of muscle used to attach two other muscles together D. A fibrous, perpendicular insertion between successive sheets or blocks of muscle E. A narrow, vertical, fibrous strip used to attach muscle sheaths of the left and right rectus abdominis
Unlike inspiration, expiration is a passive act because no muscular contractions are involved. Expiration, however, depends on two factors. Which of the choices below lists those two factors?
A) the recoil of elastic fibers that were stretched during inspiration and the inward pull of surface tension due to the film of alveolar fluid B) the expansion of respiratory muscles that were contracted during inspiration and the lack of surface tension on the alveolar wall C) the negative feedback of expansion fibers used during inspiration and the outward pull of surface tension due to surfactant D) combined amount of CO2 in the blood and air in the alveoli
Large cells that give rise to platelets are called ________.
Fill in the blank(s) with the appropriate word(s).
A complex carbohydrate that consists of several repeating units of simple sugars is referred to as a ________.
Fill in the blank(s) with the appropriate word(s).