Neurons may be classified by their morphology (shape). Alpha motor neurons consist of 1 axon with many dendritic trees. Which type of morphology does this describe?
a. Multipolar
b. Bipolar
c. Pseudounipolar
d. Interneuron
Answer: a. Multipolar
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In order for a malignant cancer to metastasize, it must:
A. lose its connections to adjacent cells. B. lose its connections to the extracellular matrix. C. become motile. D. All of the above are correct.
The term that refers to those microbes found as symbionts in a short relationship of a nongrowing nature is ________.
Fill in the blank(s) with the appropriate word(s).
Cholera is a bacterial disease, in which fatal dehydration can occur due to loss of water into the intestines. Cystic fibrosis is a human genetic disease characterized by excess mucus buildup on the linings of the lungs, making breathing difficult. Cholera acts on intestine cells to force water transport out of the cells and the body. Cystic fibrosis has an abnormal CFTR transport protein that limits water transport out of the cells and the body. How does the bacteria that causes cholera, Vibrio cholera, trigger potentially life-threatening diarrhea?
A. Cholera toxin stimulates CFTR, leading to decreased transport of water into the intestines. B. Cholera toxin causes a DNA genetic mutation that modifies the function of CFTR proteins. C. Cholera toxin inhibits CFTR, leading to decreased transport of water into the intestines. D. Cholera toxin inhibits CFTR, leading to increased transport of water into the intestines. E. Cholera toxin stimulates CFTR, leading to increased transport of water into the intestines.
The scientist given credit for devising the two-word naming system of all living organisms is
A. Aristotle. B. Charles Darwin. C. Gregor Mendel. D. Carolus Linnaeus. E. Louis Pasteur.