Stimulus intensity is typically encoded in
a. action potential amplitude.
b. frequency of action potentials.
c. number of receptors activated.
d. Both action potential and amplitude and frequency.
e. Both action potential frequency and number of receptors stimulated.
E
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Second messenger molecules directly
A) change enzyme activity. B) change regulation of gene expression. C) increase intracellular calcium concentration. D) change the regulation of ion channels. E) All of the answers are correct.
The surgical removal of an area of dead tissue along the intestinal tract is called __________
Fill in the blank(s) with correct word
A circular path of neurons synapsing with one after another is called a ________ circuit.
A. synaptic B. parallel C. dendritic D. recurrent
How do oxygen and nutrients reach the osteocytes supporting each osteon?
A) Oxygen and nutrients diffuse through the mineralized osteoid B) Cytoplasmic extensions located in the canaliculi allow oxygen and nutrients to pass from cell to cell. C) Perforating canals carry the blood between the periosteum and each osteocyte. D) Dendritic cells move between the lamellae delivering oxygen.