Tamoxifen is a breast-cancer drug that binds to the estrogen receptor. When in the body, tamoxifen binds to the estrogen receptor for much longer than the patient's own estrogen. Tamoxifen stays bound for so long that it prevents the binding of circulating estrogen to its receptor. Tamoxifen must have a higher ________ for the estrogen receptor than estrogen.
A. specificity
B. accommodation
C. inhibition
D. saturation
E. affinity
Answer: E
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Which is normally TRUE about the intrapleural pressure?
A. During a passive exhale, it increases to a value above atmospheric pressure. B. It is lower than alveolar pressure. C. It is always the same as atmospheric pressure during a passive exhale. D. It is between +5 and +10 mmHg above atmospheric pressure at functional residual capacity. E. It alternates between being less than, and greater than, atmospheric pressure.
Define and explain the difference between isotonic, isometric and eccentric contractions and give an example of a specific movement for each. What is the role of series elastic elements in muscle contraction?
What will be an ideal response?
Cardiac contraction is graded by varying the strength of contraction of all the cardiac muscle cells by intrinsic and extrinsic control mechanisms
a. True b. False Indicate whether the statement is true or false
You have a patient who is showing signs of edema (tissue swelling) all over his body. In addition to visible swelling in his hands, feet, and face, you can also see evidence of swelling around his organs when viewing his CAT scan images. Thinking about what you know about the factors that regulate fluid flow from the blood vessels. Which of the following causes of edema seem most likely?
A. Low red and white blood cell counts due to cancer in the bone marrow B. Low plasma protein concentration due to liver failure C. Low blood pressure due to severe dehydration D. High blood solute concentration due to kidney failure