The figure illustrates keratinization in the epidermis. What layer of the epidermis is "E"?
A. stratum lucidum
B. stratum spinosum
C. stratum granulosum
D. stratum basale
E. stratum corneum
D
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Both the male and female urethras serve both the urinary and the reproductive systems
Indicate whether the statement is true or false
In a laboratory experiment you have treated a muscle cell with a calcium channel blocker. The membrane still depolarizes, but the concentration of calcium never increases in the cytosol. Which of the following describes what will happen next?
A. Contraction will occur, but the muscle will be stuck in the contracted state and unable to relax. B. Tropomyosin will continue to cover the myosin binding sites on actin and no cross-bridges will form. C. Only one cross-bridge cycle will occur but no second cycle. D. Binding of myosin to actin will take place. E. A single twitch in skeletal muscle but no sustained contraction.
The thick tangle of capillary loops found within a corpuscle is known as the
A. Bowman. B. convoluted capillary bed. C. glomerular capsule. D. glomerulus. E. nephron.
The active form of vitamin D, which is synthesized in the kidney and plays an important role in normal calcium metabolism, is ________.
Fill in the blank(s) with the appropriate word(s).