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.


1. TRUE
2. FALSE
3. TRUE
4. FALSE
5. FALSE

Biology & Microbiology

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The anticodon loop of the first tRNA that will complement this mRNA is

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What cell type engulfs pathogens and foreign particles and signals to the immune system to report the presence of a threat?

a. lymphocytes b. B cells c. phagocytes d. mucus-producing cells e. normal flora

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