Some organs containing smooth muscle are capable of maintaining a constant contraction rhythm. How do they do this?Multiple choice question.They contain pacemaker cells.They respond to rhythmic stimulation by the endocrine system.They have intercalated disks.They contain calmodulin.

Check all that apply to smooth muscle contraction.Check All That ApplyIn smooth muscles, tropomyosin reveals the myosin-binding site on calmodulin. In smooth muscles, tropomyosin reveals the myosin-binding site on calmodulin.Calmodulin molecules when bound to calcium activate myosin kinase.Calmodulin molecules when bound to calcium activate myosin kinase.Cross-bridge cycling is slower in forming when compared to skeletal muscles.Cross-bridge cycling is slower in forming when compared to skeletal muscles.Smooth muscles contraction is stimulated by neurons and hormones.Smooth muscles contraction is stimulated by neurons and hormones.

Which of the following is an accurate description of smooth muscle?Group of answer choicesIt is under voluntary control.It controls movement of limbs and joints.It controls itself, with some fine-tuning by the nervous and endocrine systems.It is found in hollow internal organs.

What is a key feature of smooth muscle contraction compared to skeletal muscle?Group of answer choicesIt can sustain contractions for longer without fatigue.It requires more frequent stimulation to maintain contraction.It contracts more rapidly.It is under conscious control.

Which muscle contraction is involuntary?Group of answer choicesskeletal onlycardiac onlycardiac and smooth musclesmooth onlycardiac, smooth and skeletal muscle

Multiple Select QuestionSelect all that applySelect all correct descriptions of smooth muscle.Multiple select question.Fibers are striated.Cells are spindle-shaped.Cell contraction is involuntary.Cells contain intercalated disks.Fibers are uninucleated.