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Smooth muscle: Quiz


Question 1: Smooth muscle contraction is caused by the sliding of myosin and ________ filaments (a sliding filament mechanism) over each other.

Question 2: ________ couple adjacent cells chemically and electrically, facilitating the spread of chemicals (e.g., calcium) or action potentials between smooth muscle cells.
DesmoplakinHistologyCell junctionGap junction

Question 3: The Rhoa and Rac portion of the signaling pathway provides a calcium-independent way to regulate resistance ________ tone.
Systemic circulationBlood vesselArterial treeArtery

Question 4: Renin in turn activates the ________ system to regulate blood presure.
Human physiologyRenin-angiotensin systemAngiotensinVasodilation

Question 5: These fibers with their extracellular matrices contribute to the ________ of these tissues.
SolidViscoelasticityViscosityLinear elasticity

Question 6: Contraction and relaxation can be induced by a number of physiochemical agents (e.g., hormones, drugs, neurotransmitters - particularly from the ________.
Sympathetic nervous systemParasympathetic nervous systemNerveAutonomic nervous system

Question 7: They may be directly stimulated by the ________ ("involuntarily" control), but can also react on stimuli from neighbouring cells and on hormones (vasodilators or vasoconstrictor) within the medium that it carries.
Parasympathetic nervous systemSympathetic nervous systemNerveAutonomic nervous system

Question 8: "Smooth muscle condition" is a condition in which the body of a developing embryo does not create enough smooth muscle for the ________.
Colorectal cancerPeritonitisAscending cholangitisHuman gastrointestinal tract

Question 9: Anti-smooth muscle antibodies (ASMA) can be a symptom of an ________ disorder, such as hepatitis, cirrhosis, or lupus.
Autoimmune diseaseCell-mediated immunityAutoimmunityHypersensitivity

Question 10: The energy for this to happen is provided by the ________ of ATP.


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