The paired lungs are located in the mediastinum.
a. true
b. false
Answer: b. false
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Ascending and descending tracts can be found in which area(s) of the spinal cord?
A) 9
B) 8
C) 11, 12, 13, 14
D) 1, 2, 3
E) 4, 5, 6
After carrying a heavy box, you put it down by lowering it with your arms. Your biceps brachii muscles are contracting, but not forcefully enough to shorten and lift the box back up. This type of contraction is specifically called a(n) ________ contraction.
Fill in the blank(s) with the appropriate word(s).
Neural signals about oxygen levels in the blood come from
A. osmoreceptors in the hypothalamus. B. oxygen receptors in the primary respiratory center. C. chemoreceptors in the carotid and aortic bodies. D. baroreceptors in the aorta and carotid arteries. E. hemoglobin detectors in the pons.
In compact bone, ________ connect adjacent lacunae, thereby providing pathways for nutrients and other materials to pass between osteocytes.
A. lamellae B. perforating canals C. blood vessels D. osteonic canals E. canaliculi