Study Guide: Muscle Contraction

Which of the following is not a general function of muscle tissue?

The skeletal muscle fiber characteristic of excitability directly results in these cells being capable of

The correct order of arrangement of skeletal muscle cells, from largest to smallest is

Sarcoplasmic reticulum is

Which of the following are myofilament proteins?

The contractile unit of a myofibril is the

The chief function of the T tubule is to

Myosin heads are also called

During muscle contraction, Ca++ is released from the

The region of a muscle fiber where a motor neuron connects to the muscle fiber is called the

The thick myofilaments is made up of myosin.

Skeletal muscle has a poor ability to stretch.

A T tubule sandwiched between sacs of sarcoplasmic reticulum is called a codon.

Actin, troponin, and trop0myosin are present on the thin myofilament.

The I band resides within a single sarcomere.

Rigor mortis is caused by a lack of ATP to "turn off" muscle contraction.

The cell membrane of a muscle fiber is called the sarcoplasmic reticulum.

Anaerobic respiration is the first choice of the muscle cell for the production of ATP.

During rest, excess oxygen molecules in the sarcoplasm are attracted to a large protein molecule called myoglobin.

Anaerobic respiration results in the formation of an incompletely catabolized molecule called lactic acid.

The principal component(s) of a motor unit is/are:

The staircase phenomenon is also known as

Skeletal muscles are innervated by

Which of the following statements concerning isometric contractions is true?

Physiologic muscle fatigue is caused by

Increase in muscle size is called

Endurance training is also called

A muscle contracts the instant it is stimulated.

Isotonic contraction is one in which the tone or tension within a muscle remains the same, but the length of the muscle changes.

One method of studying muscle contraction is called myography.

Muscles with more tone than normal are described as flaccid.

cardiac muscle tissue: [blank_start]striated[blank_end], [blank_start]contains a single nucleus[blank_end], [blank_start]large-diameter T tubules forming diads[blank_end], [blank_start]intercalated disks[blank_end] skeletal muscle tissue: [blank_start]contains many nuclei near the sarcolemma[blank_end], [blank_start]voluntary[blank_end], [blank_start]movement of bones[blank_end], [blank_start]heat production[blank_end], [blank_start]posture[blank_end] smooth muscle tissue: [blank_start]located in the walls of hollow organs[blank_end], [blank_start]not striated[blank_end], [blank_start]peristalsis[blank_end], [blank_start]loosely organized SR[blank_end]

When a muscle does not shorten and no movement results, the contraction is

Pushing against a wall is an example of which type of contraction?

Prolonged inactivity causes muscles to shrink in mass, a condition called

Which statements is true of smooth muscle?

What is a quick, jerky response of a given muscle to a single stimulus called?

The energy repaired for muscular contraction is obtained by hydrolysis of amino acids.

A motor neuron together with the cells it innervates is called a motor unit.

If muscle cells are stimulated repeatedly without adequate periods of rest, the strength of the muscle contraction will decrease resulting in fatigue.

The minimum level of stimulation required to cause a fiber to contract is called the threshold stimulus.

Weakness of abdominal muscles can lead to a hernia.

There are two types of smooth muscle visceral and multiunit.

Cardiac muscle is also known as striated involuntary.

The length/tension relationship states that the maximal strength a muscle can develop is related to the length of the fibers.

Skeletal muscles have little effect on body temperature.