Which cell type is most likely to have created the medullary cavity in a long bone?
a. osteocytes
b. osteoblasts
c. osteoclasts
d. osteoprogenitor cells
c. osteoclasts
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Small areas of the myocardium contracting chaotically is called
A) flutter. B) fibrillation. C) tachycardia. D) bradycardia.
Which of the following statements about negative feedback is incorrect?
a. It exists when a change in a regulated variable triggers a response that opposes the change. b. It exists when the input to a system increases the output and the output inhibits the input. c. The control system's input and output continue to enhance each other. d. It is the method by which most of the body's control mechanisms operate. e. It helps maintain the body's dynamic, steady state.
The sagittal suture is located between the
A. parietal and temporal bones. B. frontal and temporal bones. C. parietal and occipital bones. D. two parietal bones. E. frontal and parietal bones.
If lung disease results in an arterial PO2 of 80 mmHg, the total amount of oxygen carried by the blood is 20% below normal
Indicate whether the statement is true or false.