which describes the action of the diaphragm when it contracts?
a) during expiration, it elevates the floor of thorax
b) during inspiration, it elevates and protracts the ribs
c) during expiration, it depresses and retracts the ribs
d) during inspiration, it depresses the floor of thorax
d) during inspiration, it depresses the floor of thorax
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Catabolism of protein is not a practical source of quick energy because of all of the following except that
A) proteins are more difficult to break apart than lipids or carbohydrates. B) the energy yield from protein is less than the yield from lipids. C) one of the by-products of protein catabolism is ammonia. D) most individuals have little protein to spare before harming vital organs. E) extensive catabolism of protein threatens homeostasis.
The correct structure of DNA components can be presented as
Phosphate - base- sugar Phosphate - sugar - base Base - phosphate- sugar Phosphate - sugar - phosphate - base Base - sugar - phosphate - base
Smoking affects the cardiovascular system in all of the following ways except
What will be an ideal response?
Which of the following is not found in the epidermis?
A. Stem cells B. Melanocytes C. Keratinocytes D. Tactile cells E. Fibroblasts