Chapter 11: Muscular Tissue

Not a purpose of the excess postexercise oxygen consumption in muscle

Which muscle type depends solely on the sarcoplasmic reticulum as its calcium source?

Which muscles can contract without the need for nervous stimulation?

80% of the lactic acid produced by skeletal muscle is converted to pyruvic acid

During muscle contraction, a single myosin head consumes ATP at a rate of about

The term for shortening of a muscle while maintaining constant tension is

Which fibers are primarily responsible for producing lactic acid?

Michael Jordan was arguable the best player in professional basketball history. Scientifically one would expect him to have highly developed

Where would you expect to find numerous gap junctions in muscular tissue?

The contraction strength of smooth muscle is relatively independent of its resting length partly because

In comparison to skeletal muscle, smooth muscle

Which of the following is very important for muscle to continue contraction during anaerobic respiration?

The minimum stimulus needed to cause muscle contraction is called

If one nerve stimulus arrives at a muscle fiber so soon that the fiber has only partially relaxed from the previous twitch, the most likely result will be

Which is true concerning isotonic eccentric contraction?

Which of the following has the largest mitochondria?

To stimulate muscle contraction, acetylcholine is released from the ____ into the synaptic cleft.

The absence or inhibition of acetylcholinesterase at a synapse would lead to what?

Which statement best describes the goal of medications used to treat myasthenia gravis?

The process of bringing more motor units into use during a muscle contraction is called

Aerobic respiration produces approximately ____ more ATPs per glucose molecule than glycolysis does.

Athletes who train at high altitudes increase their red blood cell count and thus increase their oxygen supply during exercise. Increased oxygen supply results in

Cardiac muscle has very little capacity for regeneration because it lacks

Which of the following would be caused by contraction of smooth muscle?

The triads of a muscle fiber consist of

As you are lifting a box, someone places extra weight on top of it. For your muscle to continue contraction and lifting the box, the muscle must

The protein that acts as a calcium receptor in skeletal muscle is

Drugs called calcium channel blockers may be used to lower blood pressure by causing arteries to vasodilator. These drugs

Exposure o Clostridium tetani causes continuous release of acetylcholine. What effect does this have on smooth muscle?

Dystrophin, the protein that is defective in muscular dystrophy is normally found

A reason that muscle twitches become progressively stronger in treppe is

The purpose of varicosities in motor nerve fibers in muscle physiology is

Creatine kinase

Release of acetylcholine at a neuromuscular junction

Which of the following best describes the resting membrane potential (RMP)?

The sarcolemma of a resting muscle fiber is most permeable to

What is the purpose of the triad?

Which of the following individuals would have more mitochondria in her skeletal muscle?

Which of the following systems would provide energy for a racquetball player?

Loss of muscle mass from lack of activity is termed

Which of the following is not a characteristic of a muscle cell?

Collagen is

A myofilament that flanks a thick filament and anchors it to a Z disc is called

The bladder's ability to greatly distend and return to normal tension is due to the ____ of smooth muscles.

A skeletal muscle generates the greatest tension when it is

A volleyball player depends on the gastrocnemius muscles for plantar flexion, whereas a marathon runner depends more on the soleus muscles for the same action. This is because the soleus muscles

In skeletal muscle, alternating light and dark bands are termed

The training regimen of a competitive weight lifter is designed partly to