Weight training increases muscle mass by increasing the
a. amount of protein in individual muscle fibers.
b. number of muscle fibers in each muscle.
c. amount of glycogen in each muscle fiber.
d. a and b.
e. a and c.
A; After maturing, muscle cells do not divide and can only increase in size by the addition of more protein. Glycogen stores contribute little to muscle mass.
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The A horizon contains little, if any organic matter
a. True b. False
Osmosis can be characterized as: a. associated with an organism's salinity
b. a very important and challenging part of a marine organism's survival. c. all of these choices. d. the movement of water across a membrane due to solute concentrations.
All the following are found in both plant and animal cells, except:
a. cell wall b. mitochondria c. cell membrane d. endoplasmic
In the textbook, the stomach was given as an example of an organ. Which of the following is a valid description of the work of one of its tissues?
A) Its epithelial tissue secretes substances that help with digestion. B) Its muscle tissue forces secretions out of glands and into the stomach. C) Its connective tissue helps drain the stomach contents. D) Its nervous tissue communicates directly with the intestines to coordinate digestion.