Recruitment of different types of motor units in a muscle is one means of varying the amount of tension generated in that muscle
Indicate whether the statement is true or false.
TRUE
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Which of the following is NOT true of the differences between the male and female urethrae?
A) The male urethra is part of both the urinary and reproductive systems while the female urethra is only part of the urinary system. B) The male urethra opens at the tip of the penis while the female urethra opens anterior to the vagina opening. C) The male urethra transports both urine and sperm (but never at the same time) while the only function of the female urethra is to transport urine. D) The male urethra has three different regions: prostatic, membranous, and spongy while the female urethra lacks these regions. E) The male urethra is the same length as the female urethra.
In the DNA molecule, the complementary base pair of adenine is always
A. thymine. B. cytosine. C. uracil. D. guanine.
A buffer will
A. enhance changes in the pH of the solutions. B. make a solution more acidic. C. make a solution more basic. D. have no effect on the pH of the solutions. E. resist drastic changes in the pH of the solutions.
The vertebral column includes ________ cervical, ________ thoracic, and ________ lumbar vertebrae.
A. 6; 14; 6 B. 5; 12; 7 C. 7; 12; 5 D. 6; 13; 5 E. 7; 13; 4