Chapter 45, Problem 1TYK

Which of the following muscle types and characteristic is correctly matched?    Smooth muscle : Ca-calmodulin regulation of myosin light chain kinase   Cardiac muscle : calcium only from the sarcoplasmic reticulum   Cardiac muscle : dense body anchoring proteins    Skeletal muscle : varicosity at neuromuscular junctions

Muscular Dystrophy (MD) is the name of a group of muscle disorders that are characterized by progressive weakness and wasting of the voluntary muscles that control body movement. As muscle tissue weakens and wastes away, it is replaced by fatty and connective tissue. Duchenne muscular dystrophy is the most severe form of dystrophinopathy . It occurs mostly in young boys and is the most common form of MD that affects children. Which of the following would NOT likely be a sign or symptom of Duchenne muscular dystrophy ? A)lack of peristalsis in the digestive tract b)frequent falls c) weakness in lower leg muscles, resulting in difficulty running and jumping D) difficulty getting up from a lying or sitting position

Which of the following best describe skeletal muscle tissue? O It is under involuntary control. O It is striated and lines the walls of internal organs. O It is under voluntary control and contains intercalated discs O It is striated and contains multiple nuclei.