Question 1

Communication between axons and muscle fibers occurs at specialized synapses called ________.

Accepted Answer

neuromuscu

Question 2

The advantage of having many nuclei in a skeletal muscle fiber is

Accepted Answer

A) the ability to contract. 
B) the ability to produce more ATP with little oxygen. 
C) the ability to store extra DNA for metabolism. 
D) the ability to produce large amounts of the muscle proteins needed for growth and repair. 
E) the ability to produce nutrients for muscle contraction. 
A) the ability to contract. 
B) the ability to produce more ATP with little oxygen. 
C) the ability to store extra DNA for metabolism. 
D) the ability to produce large amounts of the muscle proteins needed for growth and repair. 
E) the ability to produce nutrients for muscle contraction.

Question 3

The increase in muscle tension that is produced by increasing the number of active motor units is called

Accepted Answer

A) incomplete tetanus. 
B) complete tetanus. 
C) treppe. 
D) wave summation. 
E) recruitment. 
A) incomplete tetanus. 
B) complete tetanus. 
C) treppe. 
D) wave summation. 
E) recruitment.

Question 4

At rest,the tropomyosin molecule is held in place by

Accepted Answer

A) actin molecules. 
B) myosin molecules. 
C) troponin molecules. 
D) ATP molecules. 
E) calcium ions. 
A) actin molecules. 
B) myosin molecules. 
C) troponin molecules. 
D) ATP molecules. 
E) calcium ions.

Question 5

A muscle producing tension that peaks and falls at intermediate stimulus rates is said to be in

Accepted Answer

A) incomplete tetanus. 
B) complete tetanus. 
C) treppe. 
D) wave summation. 
E) recruitment. 
A) incomplete tetanus. 
B) complete tetanus. 
C) treppe. 
D) wave summation. 
E) recruitment.

Question 6

The type of muscle fiber that is most resistant to fatigue is the ________ fiber.

Accepted Answer

A) fast 
B) slow 
C) intermediate 
D) anaerobic 
E) high-density 
A) fast 
B) slow 
C) intermediate 
D) anaerobic 
E) high-density

Question 7

The narrow space between the synaptic terminal and the muscle fiber is the

Accepted Answer

A) synaptic knob. 
B) motor end plate. 
C) motor unit. 
D) synaptic cleft. 
E) M line. 
A) synaptic knob. 
B) motor end plate. 
C) motor unit. 
D) synaptic cleft. 
E) M line.

Question 8

Cross-bridges are portions of

Accepted Answer

A) actin molecules. 
B) myosin molecules. 
C) troponin molecules. 
D) tropomyosin molecules. 
E) calcium ions. 
A) actin molecules. 
B) myosin molecules. 
C) troponin molecules. 
D) tropomyosin molecules. 
E) calcium ions.

Question 9

A muscle produces its highest tension when in complete ________.

Accepted Answer

The answer of A muscle produces its highest tension when...

Question 10

The most important factor in decreasing the intracellular concentration of calcium ion after contraction is

Accepted Answer

A) active transport of calcium across the sarcolemma. 
B) active transport of calcium into the sarcoplasmic reticulum. 
C) active transport of calcium into the synaptic cleft. 
D) diffusion of calcium out of the cell. 
E) diffusion of calcium into the sarcoplasmic reticulum. 
A) active transport of calcium across the sarcolemma. 
B) active transport of calcium into the sarcoplasmic reticulum. 
C) active transport of calcium into the synaptic cleft. 
D) diffusion of calcium out of the cell. 
E) diffusion of calcium into the sarcoplasmic reticulum.

Question 11

Large-diameter,densely packed myofibrils,large glycogen reserves,and few mitochondria are characteristics of

Accepted Answer

A) slow fibers. 
B) intermediate fibers. 
C) fast fibers. 
D) red muscles. 
E) fatty muscles. 
A) slow fibers. 
B) intermediate fibers. 
C) fast fibers. 
D) red muscles. 
E) fatty muscles.

Question 12

The ability of smooth muscle to function over a wide range of lengths is called

Accepted Answer

A) elasticity. 
B) contractility. 
C) extensibility. 
D) plasticity. 
E) variability. 
A) elasticity. 
B) contractility. 
C) extensibility. 
D) plasticity. 
E) variability.

Question 13

Thin filaments are mostly made of the protein ________.

Accepted Answer

The answer of Thin filaments are mostly made of the...

Question 14

Figure 10-1 Skeletal Muscle Fiber
Use Figure 10-1 to answer the following question:
-Where are the myosin molecules located?

Accepted Answer

A) 4 
B) 5 
C) 6 
D) 7 
E) 8 
A) 4 
B) 5 
C) 6 
D) 7 
E) 8

Question 15

Thirty minutes after Mary has completed a 25-km race,she begins to notice severe muscle soreness and stiffness in her legs.Her urine is dark colored.She wonders whether she may have damaged her muscles during the race.She visits the ER,and the doctor orders several blood tests.What kind of blood tests can help determine whether muscle damage has occurred?

Accepted Answer

If muscle damage occurred,the doctor wou

Question 16

How would the loss of acetylcholinesterase from the motor end plate affect skeletal muscle?

Accepted Answer

A) It would make the muscles less excitable. 
B) It would produce muscle weakness. 
C) It would cause spastic paralysis (muscles are contracted and unable to relax). 
D) It would cause flaccid paralysis (muscles are relaxed and unable to contract). 
E) It would have little effect on skeletal muscles. 
A) It would make the muscles less excitable. 
B) It would produce muscle weakness. 
C) It would cause spastic paralysis (muscles are contracted and unable to relax). 
D) It would cause flaccid paralysis (muscles are relaxed and unable to contract). 
E) It would have little effect on skeletal muscles.

Question 17

Megan wants to enter a weight-lifting competition and consults you as to what type of muscle fibers she needs to develop and how she should go about it.What would you suggest to her?

Accepted Answer

Weight lifting requires anaerobic endura

Question 18

The region of the sarcomere that always contains thin filaments is the

Accepted Answer

A) Z line. 
B) M line. 
C) H band. 
D) A band. 
E) I band. 
A) Z line. 
B) M line. 
C) H band. 
D) A band. 
E) I band.

Question 19

After heavy exercise,if energy reserves in a muscle are depleted,________ occurs.

Accepted Answer

A) an oxygen debt 
B) paralysis 
C) treppe 
D) tetanus 
E) atrophy 
A) an oxygen debt 
B) paralysis 
C) treppe 
D) tetanus 
E) atrophy

Question 20

Physical evidence that supports the sliding filament theory of muscle contraction includes

Accepted Answer

A) constant distance between Z lines during contraction. 
B) decreased width of the H band during contraction. 
C) increased width of the I band during contraction. 
D) decreased width of the A band during contraction. 
E) the I band + H band distance is constant during contraction. 
A) constant distance between Z lines during contraction. 
B) decreased width of the H band during contraction. 
C) increased width of the I band during contraction. 
D) decreased width of the A band during contraction. 
E) the I band + H band distance is constant during contraction.

Exam 10: Muscle Tissue

Communication between axons and muscle fibers occurs at specialized synapses called ________.

The advantage of having many nuclei in a skeletal muscle fiber is

The increase in muscle tension that is produced by increasing the number of active motor units is called

At rest,the tropomyosin molecule is held in place by

A muscle producing tension that peaks and falls at intermediate stimulus rates is said to be in

The type of muscle fiber that is most resistant to fatigue is the ________ fiber.

The narrow space between the synaptic terminal and the muscle fiber is the

Cross-bridges are portions of

A muscle produces its highest tension when in complete ________.

The most important factor in decreasing the intracellular concentration of calcium ion after contraction is

Large-diameter,densely packed myofibrils,large glycogen reserves,and few mitochondria are characteristics of

The ability of smooth muscle to function over a wide range of lengths is called

Thin filaments are mostly made of the protein ________.

Figure 10-1 Skeletal Muscle Fiber Use Figure 10-1 to answer the following question: -Where are the myosin molecules located?

How would the loss of acetylcholinesterase from the motor end plate affect skeletal muscle?

Megan wants to enter a weight-lifting competition and consults you as to what type of muscle fibers she needs to develop and how she should go about it.What would you suggest to her?

The region of the sarcomere that always contains thin filaments is the

After heavy exercise,if energy reserves in a muscle are depleted,________ occurs.

Physical evidence that supports the sliding filament theory of muscle contraction includes

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Articulations

The Muscular System

Neural Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Neural Integration I: Sensory Pathways and the Somatic Nervous System

Neural Integration Ii: the Autonomic Nervous System and

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

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