Sully is involved in a car accident in which he is rear-ended. The traumatic hyperextension of his head caused
A. a herniated disc.
B. scoliosis.
C. whiplash.
D. a fracture.
E. spina bifida.
Answer: C
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The part of the hair that begins from a small cap-shaped cluster of cells is called the:
a. hair follicle b. hair shaft c. hair papilla d. none of the above
Compare and contrast the structural and functional differences between single -unit and multi-unit smooth muscle fibers, particularly in regard to their ability to vary their force of contraction.
What will be an ideal response?
The heart is surrounded by the ________ membrane.
A) pericardial B) peritoneal C) visceral D) serous E) pleural
Which statement is incorrect?
a. Juxtamedullary nephrons establish a vertical osmotic gradient in the medulla. b. NaCl pumps of the ascending limb of the loop of Henle can establish a 1,200 mOsm/liter difference between ascending and descending limbs at any given location. c. Countercurrent exchange allows the vasa recta to preserve the vertical osmotic gradient while supplying blood to the medullary tissue. d. Collecting tubules of all nephrons utilize the driving force of the vertical osmotic gradient to accomplish variable H2O reabsorption under the control of vasopressin. e. The filtrate is isotonic as it enters the loop of Henle, hypertonic at the tip of the loop of Henle, and hypotonic as it leaves the loop of Henle.