The lumen of a transverse tubule is occupied by
A. extracellular fluid.
B. cytoplasm.
C. actin.
D. myosin.
E. sarcomeres.
A. extracellular fluid.
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If an athlete is burning glucose only, what is the ratio of oxygen consumed to carbon dioxide that will be produced?
C6H12O6 + 6O2 ? 6CO2 + 6H2O A. 1:1 B. 1:6 C. 2:1 D. 1:2 E. 6:1
How do the protein fibers in the matrix ground substance compare between loose and fibrous connective tissues?
A) In loose connective tissues, the protein fibers are loosely woven, but in fibrous connective tissues, the fibers are densely packed. B) In fibrous connective tissues, the protein fibers are loosely woven, but in loose connective tissues, the fibers are densely packed. C) The protein fibers are dark red in fibrous connective tissue but are white in loose connective tissues. D) The protein fibers are white in fibrous connective tissue but are dark red in loose connective tissues.
A person hears a sound coming from a hole in the ground. Sometime later a groundhog is seen emerging from the hole in the ground. The person suspects that the sounds were made by the groundhog since they have witnessed this behavior before. The underlined portion of this story is best described as a(n)
A. experiment. B. hypothesis. C. observation. D. test of a hypothesis.
Male fish that display a bright blue color attract more mates as well as more predators. Maintaining that blue gene in the population is an example of
A) the founder effect. B) coevolution. C) genetic drift. D) sexual selection. E) a population bottleneck.