A sarcoma is a cancer derived from ________ tissue.
A. epithelial
B. connective
C. muscle
D. nerve
Answer: B
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A fetus develops in such a way that the type II cells of the lungs never develop, resulting in no production of surfactant in the alveoli. The fetus continues development and survives to birth. What will happen when the newborn tries to take its first breath?
A. It won't be able to take its first breath because the lungs need to be filled with fluids after birth to allow them to expand. Without being completely filled with surfactant, air cannot enter. B. It will breathe and then begin coughing as the alveoli will have little to no surface tension. C. It won't be able to take its first breath because its lungs will remain collapsed from high surface tension. D. The lungs will start to be digested, as surfactant blocks proteases and other fluids from reaching alveolar tissues.
What are the signs of organophosphate toxicity? Knowing these signs, what is a possible antidote?
What will be an ideal response?
In hyperopia,
a. the eyeball is too short or the lens is too weak. b. a near object is focused behind the retina, even with accommodation. c. a far source of light is focused ahead of the retina. d. both (a) and (b) above. e. both (a) and (c) above.
Vasopressin
a. secretion is stimulated by a water deficit. b. increases the permeability of the distal and collecting tubules to water. c. increases the permeability of the late portion of the collecting tubule to urea. d. both (a) and (b) above. e. all of these answers.