____ muscle fibers are used for prolonged activity and have ____ mitochondria
a. Red; few
b. Red; many
c. White; few
d. White; many
e. Red and white; few
b
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Cells with gap junctions are typical of tissues
a. that suffer wear, abrasion, and mechanical insults. b. such as bone and cartilage that must withstand external forces. c. that require rapid exchange of chemical messages, as is the case for cardiac muscle. d. that secrete enzymes or hormones. e. described by all of these.
In humans, male gametes are called ________, while female gametes are called ________.
A. sperm; eggs B. pollen; eggs C. eggs; sperm D. eggs; pollen
Which type of equilibrium is modeled in the following figure?
a. stable b. unstable c. mixed d. neutral e. complex
The spread of cancer cells from one site to others in the body is known as _____
a. cleavage b. metastasis c. benign transfer d. neoplastic movement
e. mutational slippage