Answer the following statements true (T) or false (F)
1.Homeostasis could be disrupted by drugs which affected any of: sympathetic division, parasympathetic division, hypothalamus.
2.A typical neuron consists of a cell body, dendrites, and an axon.
3.A neuron must reach threshold potential before an action potential begins.
4.Unmyelinated regions between adjacent myelin sheath cells are called synaptic clefts.
5.The connection point between an interneuron and a motor neuron is a synapse.
1.TRUE
2.TRUE
3.TRUE
4.FALSE
5.TRUE
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Fossil evidence from five continents exists for 100 extinct, and one extant, species of ____
a. humans b. birds c. trilobites d. insects e. horses
What marine biology laboratory inspired other facilities of the same kind?
a. Marine Biological Laboratory at Woods Hole b. Friday Harbor Laboratories of the University of Washington c. Museum of Comparative Zoology at Harvard University d. Scripps Institute of Oceanography in California
In plants, most differentiated cells retain
A) only a tiny fraction of their original set of genes. B) a complete set of their genes but lose the ability to express most of those genes. C) a complete set of their genes and retain the ability to express those genes under certain circumstances. D) the ability to dedifferentiate but then cannot return to their original differentiated state.
The Gram stain, acid-fast stain, and endospore stain ________.
A. use heat to force the dye into cell structures B. are differential stains C. use a negative stain technique D. are used on a wet mount of the specimen E. have outcomes based on cell wall differences