Exam 7: The Muscular System

Place these steps of muscle contraction in the correct order. 1) Action potential is generated along the sarcolemma 2) Nerve impulse arrives at synapse 3) Calcium is released into muscle cell cytoplasm 4) Acetylcholine is produced 5) Actin and myosin molecules continuously cross-link, with actin molecules being pulled inward

Which muscle inserts on the clavicle and the acromion and spine of the scapula?

Which of the following muscles functions to maintain an erect spinal column and head?

Which of the following is one of the steps that ends a contraction?

Looking at the muscle name sternocleidomastoid, you would identify that this muscle is located in the area of the

Botulism

A muscle that inserts on the radial tuberosity or the ulnar tuberosity is most likely involved in

Which muscle extends the elbow during the action of push-ups?

Figure 7-1 Structural Components of a Skeletal Muscle Fiber Use Figure 7-1 to identify the labeled part. -Structure J represents a

The insertion of the anterior part of the frontalis muscle is the

Figure 7-1 Structural Components of a Skeletal Muscle Fiber Use Figure 7-1 to identify the labeled part. -The ________ contains vesicles filled with acetylcholine.

Active muscles generate

Which statement regarding the relaxation phase of a muscle twitch is true?

Which muscle(s) would produce a twisting of the upper body?

Figure 7-1 Structural Components of a Skeletal Muscle Fiber Use Figure 7-1 to identify the labeled part. -The triad, seen as structure D, is composed of

Creatine phosphate serves to

What is the function of the transverse tubule?

Which of the following is an accurate characteristic of slow fibers?

Regarding muscle fiber elongation,

Skeletal muscle fibers differ from "typical cells" in that these muscle fibers