By the time epidermal cells reach the surface of the epidermis they are filled with ________
A) Lunula B) Keratin C) Granulosa D) Carotene
B
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Microorganisms removed from incoming air by the mucus of the respiratory tract are ultimately exposed to and destroyed by
A) toxins in the mucus. B) the cilia. C) stomach acids and enzymes. D) a lack of nutrients. E) alveolar macrophages.
What is the difference in function between the smooth and rough endoplasmic reticulum (ER)?
A. The rough ER helps with cellular movements, while the smooth ER does not. B. The rough ER produces ATP, while the smooth ER does not. C. The rough ER conducts lipid synthesis, while the smooth ER conducts protein synthesis. D. The rough ER conducts protein synthesis, while the smooth ER conducts lipid synthesis. E. The rough ER breaks down lipids, while the smooth ER breaks down proteins and debris.
Determine what is needed for the myosin head to undergo a power stroke.
A. Splitting of ATP into ADP and Pi B. Release of Pi C. Binding of ATP to the head D. Addition of Ca2+ to the head
Most energy in the body is stored in what form?
A. ATP B. glucose C. fat D. protein E. DNA