Which of the following individuals would have the largest percentage of their body weight as water?
A. A healthy 88-year-old male
B. A lean 35-year-old male athlete
C. A 7-month-old female
D. A chunky 52-year-old male athlete
E. An adult female marathon runner
Answer: C
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The growth factor that increases the formation of erythrocytes, all classes of granulocytes, monocytes, and platelets from myeloid stem cells is
A. Multi-CSF B. M-CSF C. G-CSF D. EPO E. GM-CSF
The term "slipped disc" is often used to describe a ___________________ disc.
Fill in the blank(s) with the appropriate word(s).
A weightlifter uses muscles so the muscles exert more than 75% of their maximum
tension, This stimulates A) shrinking of skeletal muscle. B) muscle fibers developing new filaments of actin and myosin. C) an increase in slow, fatigable white fibers. D) conversion of skeletal to smooth muscle.
Intracellular signaling pathways within target cells are organized such that
A. each step allows for amplification of the signal where one molecule can activate many. B. enzymes are used up and degraded after each individual reaction they catalyze. C. each step involves one molecule activating or synthesizing exactly one other molecule for precise control.