Chapter 9 Reading

tendon The dense connective tissue at A is continuous with the tendon that connects the muscle to a bone or, in some cases, to another muscle or to the skin.

The connective tissue that covers structure A is continuous with which of the following? synovial membrane ligament tendon endomysium

2 and 6 The A band, also know as the dark band, is occupied by the entire length of thick myofilaments.

The region between which two points corresponds to the entire A (dark) band? 1 and 2 2 and 6 2 and 3 3 and 5

1 and 7 The distance between points 1 and 7 spans a sarcomere, the smallest contractile unit of a muscle fiber.

The smallest contractile unit within skeletal muscle would correspond to the distance between which two points in the figure? 1 and 7 3 and 5 1 and 3 2 and 6

the ability to transform chemical energy into mechanical energy to move the body

What is the most distinguishing characteristic of muscle tissue? it is composed of multiple cells working together the ability to transform chemical energy into mechanical energy to move the body its cells' in ability to reproduce by mitosis the ability to respond to nervous stimulation

B A fascicle is an organized group of muscle fibers (cells) bounded by a perimysium.

Which of the following corresponds to a single fascicle? A B C D

secreting hormones

Which of the following is NOT a normal function of muscle tissue? maintaining posture stabilizing joints generating heat producing movement secreting hormones

the region between 2 and 3 Actin and myosin are components of thin and thick filaments, respectively. The region between points 2 and 3 includes the area of overlap between thin and thick filaments.

Which of the following regions best identifies where myosin would have maximum cross-bridge access to actin? the region between 1 and 2 the region between 3 and 5 4 the region between 2 and 3

The structure at B is covered by the perimysium. Remember that the word root peri means "around," as in "perimeter."

Which of the structures is surrounded by the connective tissue sheath known as the perimysium? A B C D

C Note that a skeletal muscle cell is commonly termed a muscle fiber.

Which structure in the figure corresponds to a single skeletal muscle cell? A B C D

muscle fiber Skeletal muscle cells fuse during development to form the mature, multinucleated muscle fibers.

Which term best identifies a muscle cell? myofibril sarcomere muscle fiber muscle fascicle