Which membrane protein is responsible for binding hormones that can trigger changes in the cell's activity?
a. recognition proteins
b. receptor proteins
c. transport proteins
d. adhesion proteins
e. channel proteins
b
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What is a global impact of glacier recession?
a. lower crop yields b. increased precipitation c. rising sea levels d. fewer tropical storms
The P wave of the ECG represents
A. the depolarization of the atria. B. the contraction of the ventricle. C. the repolarization of the atria. D. the relaxation of the atria. E. the contraction of the atria.
Blood and lymph are circulating tissues that help other arts of the body communicate and interact. Indicate whether the statement is true or false
A child falls and cuts her leg. The cut is deep enough that she is bleeding. Which of the following defense mechanisms will participate in eliminating microbes from the wound?
a. ciliary escalator b. inflammation c. normal microbiota d. lysozyme