Anatomy Dynamic Study Module Chapter 6

Which of these muscles is located in the abdominal region?

External oblique

Which of the following statements is NOT true?

Tetanic contraction of muscles refers to a disease that causes total, sustained contraction of muscles.

The neurotransmitter __________ is vital to proper muscle functioning.

acetylcholine

The bending or movement of a limb toward the midline of the body is known as __________.

adduction

Although ATP provides the energy for muscle contraction, __________ must also be present for muscle fibers to slide properly during contraction.

calcium

Exercise throughout life helps muscles to retain both strength and __________.

mass

The anatomical term for a muscle cell, in skeletal and smooth muscle tissues, is __________.

muscle fiber

The muscle that is mainly responsible for a particular movement is known as the __________.

prime mover

Considering the relationship between the biceps and the triceps, the biceps is the __________ whereas the triceps is the __________ as the elbow is flexed.

prime mover; antagonist

The plasma membrane of a muscle cell is most usually termed a __________.

sarcolemma

The endomysium is a delicate connective tissue sheath that surrounds a/an __________.

skeletal muscle fiber

The three types of muscle tissue are skeletal, cardiac, and __________.

smooth

The muscle whose action is dorsiflexion and inversion of the foot is the __________.

tibialis anterior

The essential function of any muscle is to __________.

contract

Muscles that are concerned with bracing actions are called __________.

fixators

An important medical injection site in the hip is the __________.

gluteus medius

Consider the two types of muscle contractions described in this chapter; in __________ contractions, the muscle may shorten and movement may occur.

isotonic

Which of the following statements is NOT true regarding energy generation for muscle contraction?

Anaerobic glycolysis is not an energy source for muscle contraction.

Which of the following can best be used to distinguish cardiac muscle from smooth muscle?

Cardiac muscle is striated.

Which of the following refers to one neuron and all the skeletal muscle cells it stimulates?

Motor unit

Which of the following is NOT a function of skeletal muscle?

Participates in the transport of oxygen in the blood to the tissues

In a skeletal muscle fiber, the sarcomere is a repetitive unit that consists of the entire region between the __________.

Z discs

The muscle that facilitates flexion of the forearm is the __________.

biceps brachii

Referring to the muscle attachment to bones, the __________ is the immovable attachment site.

origin

A fascicle is wrapped by a layer of connective tissue called __________.

perimysium