Ventilation would be decreased by decreasing the activity of ________.
A. type I alveolar cells
B. type II alveolar cells
C. alveolar macrophages
D. None of the choices are correct.
Answer: B
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Valves in veins
A. make the use of a skeletal muscle pump unnecessary for venous blood flow. B. are the leading cause of high blood pressure. C. are found only in the largest veins. D. cause venous blood flow to go in only one direction. E. are formed of the tunica media.
What type of homeostatic feedback reflex is the withdrawal reflex?
What will be an ideal response?
Most bones of the skeleton develop by endochondral ossification.
Answer the following statement true (T) or false (F)
In connective tissue, the role of elastic fibers is to __________
A. provide flexibility B. retain fluid C. form delicate networks around blood vessels D. provide tensile strength