How do epithelial cells obtain their nutrients?
a. Direct blood supply from an artery
b. Nutrients are delivered by macrophages.
c. Direct blood supply from a vein.
d. Diffusion from adjacent cells.
e. Osmosis of nutrients from underlying tissue.
d
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The neoteny hypothesis is supported by which of the following characteristics? Select all that apply
A. large heads B. relative hairlessness C. a foramen magnum positioned at the base of the skull D. relatively flat faces and small noses E. None of the above.
In which organ are tissue transplants least likely to be rejected?
a. liver b. lung c. heart d. eye e. kidney
The _______ nerve carries signals from the retina to the visual cortex of the cerebrum.
Fill in the blank(s) with correct word
Cancer cells are able to enter blood vessels through what is known as ______.
a. closed junctions b. tight junction c. open junctions d. intermediate junctions