Which of the following correctly lists the steps of fracture repair in sequence?
A. A hematoma forms, granulation tissue and fibrocartilage develop, osteoclasts and phagocytes clear away debris, bony callus forms.
B. A hematoma forms followed by formation of a bony callus that fibrocartilage replaces.
C. A hematoma forms, osteoblasts arrive and produce new bone tissue, osteoclasts and phagocytes clear away debris, granulation tissue forms.
D. Phagocytes clear away debris, osteoblasts remove damaged bone tissue, and a hematoma forms.
Answer: A
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Peristalsis
A) is a condition wherein the lining of the digestive tract is irritated by the passage of rough fibrous material. B) is a muscular movement pattern that occurs in regions of the digestive tract where the smooth muscle fibers are not arranged in layers. C) is waves of muscular contractions that move along the length of the digestive tract. D) only occurs in the esophagus. E) None of the answers are correct.
The plasma membrane
a. appears under an electron microscope as a double dark line with a light space between. b. is composed primarily of a double layer of phospholipid molecules with proteins interspersed throughout the phospholipids in a mosaic pattern. c. separates the intracellular and extracellular fluid. d. two of these answers. e. all of these answers.
Most cells have a resting membrane potential between ________.
A. +65 mV and +90 mV B. ?60 mV and ?90 mV C. ?65 mV and ?85 mV D. +60 mV and ?90 mV
Which cells are responsible for the breakdown of bone?
A. C cells B. Osteoprogenitor cells C. Haversian cells D. Osteoblasts E. Osteoclasts