Harry suffers from cystic fibrosis and frequently has periods where he can hardly breathe. The problem is most likely the result of
A) inflammation of the bronchi.
B) constriction of the trachea.
C) thick secretions that exceed the ability of the respiratory tract cilia to remove them.
D) laryngeal spasms that occur in response to a toxic substance produced by the epithelial cells.
E) collapse of one or both lungs.
C) thick secretions that exceed the ability of the respiratory tract cilia to remove them.
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Which of the following would NOT result in an increase in systemic vascular resistance?
a) Decreased diameter of systemic arterioles b) Increased blood viscosity c) Decreased length of the systemic circulatory route d) Increased vasoconstriction of systemic arterioles e) Increased red blood cell count
Which condition listed is a malpresentation in which the fetal buttocks or lower limbs present into the maternal pelvis?
a) Emesis gravidarum b) Deformation c) Turner's syndrome d) breech presentation e) Klinefelter's syndrome
Which of the following is the proper sequence of retinal processing?
a. rods and cones-ganglion cells-bipolar cells. b. rods and cones-bipolar cells-ganglion cells. c. ganglion cells-bipolar cells-rods and cones. d. ganglion cells-rods and cones-bipolar cells. e. bipolar cells-ganglion cells-rods and cones.
How does the digestive system contribute to osteoporosis?
A. Blood clotting starts repair process. B. Pain following injury helps prevent further injury. C. Calcitonin is used to treat osteoporosis. D. It is impacted by inadequate amounts of calcium and vitamin D in the diet. E. Lack of exercise reduces muscle stress on bone.