The postganglionic fiber in the parasympathetic division is long because the ganglia lie near or within the organ.
Answer the following statement true (T) or false (F)
False
The postganglionic fiber is short because the ganglia lie near or within the organ.
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Answer the following statements true (T) or false (F)
1. Gamma aminobutyric acid (GABA) is the most common inhibitory neurotransmitter in vertebrates. 2. Ionotropic receptors act by activating G proteins in target cells. 3. Metabotropic receptors act by initiating changes in second messenger systems in target cells. 4. Meningitis is solely a bacterially caused disease. 5. Synaptic vesicles discharge their contents at the axon hillock region.
Legume plants provide certain amino acids to the ________ so that they do not need to assimilate ________. In return, the bacteroids shuttle amino acids bearing the fixed nitrogen back to the plant.
A. bacteroids; ammonia B. bacteroids; nitrogen C. bacteroids; phosphorus D. root hairs; nitrogen
Scientists believe that macromolecules could have been formed before there were living cells by
a. chemical processes removing water from components. b. oxidation of compounds containing phosphate. c. lightning discharge catalyzing addition of water to molecules. d. enzyme-mediated condensation reactions. e. acidic hydrolysis of compounds in the Earth's oceans.
What would be the result of cross-species fertilization between a male lion and a female tiger that produced a "liger"?
a. mechanical isolation b. a sterile hybrid c. an offspring that would not be able to survive d. extinction e. speciation