The walls of the alveoli
A. contain goblet cells.
B. contain several layers of smooth muscle.
C. are surrounded by cartilage.
D. are ciliated.
E. are composed of simple squamous epithelium.
Answer: E
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Which of the following structures would be affected the most by a deficiency in collagen?
A. The epidermis of the skin B. The bones C. The liver and spleen D. The lining of the small intestine
Which of the following elements of a reflex arc is responsible for delivering sensory impulses from the receptor to the central nervous system?
A) integration center B) motor neuron C) sensory neuron D) sensory receptor
The pulse can be easily determined by palpating the
A) abdominal aorta B) jugular vein C) dorsalis pedis artery D) posterior communicating artery
What is the major difference between lymph and tissue fluid (interstitial fluid)?
A. Tissue fluid contains more white blood cells than lymph. B. Lymph is found only in lymphatic organs like lymph nodes; tissue fluid is found in the lymphatic vessels. C. Lymph contains plasma proteins; tissue fluid does not. D. Their location: lymph is in lymphatic vessels, tissue fluid is in the tissues, between tissue cells.