The axon hillock in the presynaptic neuron fire based on temporal and spatial summation of inputs
a. true
b. false
Answer: a. true
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Which statement regarding porphyrin synthesis pathways is CORRECT?
A. The succinyl-CoA/glycine porphyrin pathway is used by all bacteria, photosynthetic eukaryotes, and archaea. B. The porphyrin biosynthetic pathways are unified at the step of 5-aminolevulinic acid. C. The glutamate porphyrin pathway is used by all non-photosynthetic eukaryotes and alpha-proteobacteria. D. There is very little conservation of porphyrin synthesis pathways between eukaryotes, bacteria, and archaea.
The medicinal leech, once used to withdraw "unhealthy" blood from patients, produces ____________ to ensure blood flow from the host?
A. antibiotics B. antibodies C. anticoagulants D. blood clots E. suture material
Most antihelminthic medications act only against the pathogens, not the human host.
Answer the following statement true (T) or false (F)
Most sensory signals destined for the cerebrum pass
through the a. pons. b. olfactory area. c. cerebellum. d. thalamus. e. hypothalamus.