Lacteals
A) increase the surface area of the mucosa of the small intestine.
B) carry absorbed fats to the lymphatic system.
C) produce new cells for the mucosa of the small intestine.
D) secrete digestive enzymes.
E) produce milk.
Answer: B
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Sponges do not have a true circulatory system, but they can propel water through their bodies using flagellated __________
Fill in the blank with the correct word.
In the absence of the autonomic nervous system motor activity of cardiac and smooth muscle would cease
Indicate whether the statement is true or false
Capillaries
A. have a lot of smooth muscle in their walls. B. are a location of gas and nutrient exchange. C. are more numerous in such tissues as bone and dense connective tissue. D. experience very high internal pressures. E. have all of these properties.
Which area of the retina has the highest concentration of cones?
A) optic disc (blind spot) B) optic nerve C) choroid D) fovea centralis E) ciliary body