A man's ability to float is most directly related to his what?
A. mass
B. weight
C. volume
D. density
D. density
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It takes about _______ for an epithelial cell to migrate from the base of the villi to the tip
a. three hours b. three days c. one day d. three months e. several weeks
Sleep affects the nervous system but not the endocrine system of the body.
Indicate whether the statement is true or false.
In compact bone, ________ connect adjacent lacunae, thereby providing pathways for nutrients and other materials to pass between osteocytes.
A. canaliculi B. osteonic canals C. perforating canals D. blood vessels E. lamellae
The tricuspid valve prevents backflow of blood from the ________ into the ________.
A. left ventricle; left atrium B. right ventricle; right atrium C. right atrium; right ventricle D. left atrium; left ventricle