When viewed in cross section, the walls of arteries are __________ than those of veins.
thinner
thicker
equal
none of these choices are correct.
thicker
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Which of the following forces does not contribute to keeping the alveoli open?
a. alveolar surface tension b. transmural pressure gradient c. pulmonary surfactant d. alveolar interdependence e. none of these answers.
The heart is located _________.
Fill in the blank(s) with the appropriate word(s).
Match the structure associated with the eye with the appropriate description.A. The angle where the eyelids joinB. The space between the two eyelidsC. Another name for the eyelidsD. The membrane that covers the inner surface of the eyelidsE. The membrane that covers the anterior sclera of the eyePalpebral fissure
Fill in the blank(s) with the appropriate word(s).
During which phase of meiosis do synapsis and crossing over occur?
A. Anaphase I B. Prophase I C. Telophase II D. Prophase II E. Metaphase I