Describe the makeup of the phospholipid bilayer. Include molecular orientation and proteins as well
What will be an ideal response?
Answer: The fatty acid components of the lipids in the cytoplasmic membrane are oriented toward each other, whereas the glycerol-phosphates point out toward the cytoplasm and external environment. Proteins can span the entire membrane (both layers) or be embedded in the phospholipids on either side of the membrane.
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The clinical microbiology laboratory can provide preliminary identification of microorganisms based on
A. growth or biochemical characteristics. B. immunologic techniques that detect microbial antigens. C. microscopic examination of specimens. D. All of the choices are correct.
In humans, the thirst center is located in the
a. adrenal cortex. b. hypothalamus. c. anterior pituitary. d. glomerulus. e. stomach.
Why would someone need to have an artificial pacemaker installed in his or her heart tissue?
A) The heart valves are not directing blood flow through the chambers properly. B) The AV node is not sending signals to the ventricles. C) The SA node is not functioning properly to generate action potential at the proper intervals. D) The Purkinje fibers are not distributing the signal properly.
All of the following are benefits of sequencing the human genome EXCEPT
A) every genetic disorder is now curable or preventable. B) genes were discovered whose functions were previously unknown. C) more genes that cause disease have been discovered. D) the number of genetic disorders that can be diagnosed with molecular techniques has increased. E) better comparisons can be made between human genetics and the genetics of other organisms.