Exam 9: Muscles and Muscle Tissue

Excitation- contraction coupling requires which of the following substances?

The giant protein titin maintains the organization of the assisting in muscle stretching.

After nervous stimulation stops, what prevents ACh in the synaptic cleft from continuing to stimulate contraction?

Rigor mortis occurs because .

An anaerobic metabolic pathway that results in the production of two net ATPs per glucose plus two pyruvic acid molecules is .

Figure 9.1 Using Figure 9.1, match the following: -Individual muscle fiber.

The term aponeurosis refers to .

Figure 9.1 Using Figure 9.1, match the following: -Connective tissue covering the exterior of a muscle organ.

A contraction in which the muscle does not shorten but its tension increases is called isometric contraction.

Which of the following would be recruited later in muscle stimulation when contractile strength increases?

The end of the muscle that typically moves when a muscle contracts is called the .

How do the three muscle types respond to being stretched?

Muscle cells store more creatine phosphate than ATP resulting in the muscle having a reserve source of energy.

Which of the following is not a connective tissue sheath that wraps individual muscle fibers?

Muscle tone is _ .

Smooth muscles relax when intracellular Ca2+ levels drop but may not cease contractions.

Figure 9.1 Using Figure 9.1, match the following: -What is a muscle spasm?

The contractile units of skeletal muscles are .

Figure 9.1 Using Figure 9.1, match the following: -Skeletal muscles have two special inclusions that help them perform their function of movement. What are the two special inclusions of skeletal muscle cells and how would they be useful to the cell?

Figure 9.1 Using Figure 9.1, match the following: -The time in which cross bridges are active is called the period of .