Many visceral smooth muscle cells lack motor neuron innervation. How are their contractions coordinated and controlled?
Gap junctions interconnect visceral smooth muscle fibers. An action potential that begins in one will spread to its surrounding neighbors. The action potential can be triggered by stretching, hormones, chemical changes, or stimulation at a myoneural junction on a distant smooth muscle cell.
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The EEG tracing of a relaxed individual who has closed eyes and is not concentrating on anything in particular is mainly an alpha rhythm.
Answer the following statement true (T) or false (F)
What is the fibrous covering on the surface of bone that is involved in thickening of the bone called?
a) periosteum b) endosteum c) marrow d) epiphysis e) metaphysis
Which clotting pathway involves more steps and takes more time (approximately 5 minutes)?
A. The intrinsic pathway B. The extrinsic pathway
In the condition ________, a virus infects posterior root ganglia, causing a painful rash whose distribution corresponds to that of the affected sensory nerves as seen in their dermatomes
A) myasthenia gravis B) mumps C) shingles D) polio E) rubella