Which of the following would not result in the dilation of the feeder arterioles and opening of the precapillary sphincters in systemic capillary beds?
A) a local increase in pH
B) an increase in local tissue carbon dioxide
C) a decrease in local tissue oxygen content
D) a local increase in histamine
A
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Which of the following is the first step in healing a bone fracture?
A. Formation of a hematoma B. Bone remodeling C. Formation of a soft callus D. Formation of a hard callus
The __________ disc contains no receptor cells for vision and produces a blind spot in the visual field of each eye.
Fill in the blank(s) with the appropriate word(s).
Which stage of the cell cycle is characterized by DNA replication?
A) Anaphase B) Metaphase C) Telophase D) Interphase E) Prophase
A low count of which of the white blood cells shown in the figure may indicate radiation exposure, or systemic lupus erythromatosus?
a) A b) B c) C d) D e) E