Question 1

Which type of muscle tissue is depicted in the first image (long, cylindrical, multinucleated, striated cell), and what is its primary function?

Accepted Answer

Skeletal muscle; producing voluntary body movements

Question 2

The second image shows muscle fibers with branching, striations, and intercalated discs. Which muscle type is this, and what unique feature does it possess?

Accepted Answer

Cardiac muscle; intercalated discs for synchronized contraction

Question 3

In the third image, which type of muscle tissue is shown, and what is its main characteristic?

Accepted Answer

Smooth muscle; spindle-shaped and uninucleate

Question 4

The fourth image shows a person lifting a dumbbell. Which muscle type is primarily responsible for this action, and what property allows it to generate force?

Accepted Answer

Skeletal muscle; contractility

Question 5

The fifth image is of the heart. Which muscle type composes the heart wall, and what is a key metabolic feature of this muscle?

Accepted Answer

Cardiac muscle; relies on aerobic respiration for ATP

Question 6

The sixth image shows the stomach. Which muscle type is found in the stomach wall, and what is its main function?

Accepted Answer

Smooth muscle; moving substances through peristalsis

Question 7

The seventh image shows electrodes on a person's neck. What is being measured, and what does increased activity indicate?

Accepted Answer

Electromyography; increased muscle tension

Question 8

The eighth image shows people stretching different muscle groups. Which property of muscle tissue does this activity primarily demonstrate?

Accepted Answer

Extensibility

Question 9

The ninth image shows muscle spindles in different states. What is the function of muscle spindles?

Accepted Answer

To sense changes in muscle length and trigger reflexes

Question 10

The tenth image shows the heart within the chest. Which property of cardiac muscle allows it to contract rhythmically without nervous stimulation?

Accepted Answer

Autorhythmicity

Question 11

The eleventh image shows the stomach with a highlighted region. Which muscle type is responsible for the movement of food through this organ, and what is the process called?

Accepted Answer

Smooth muscle; peristalsis

Question 12

The twelfth image is a cartoon of a shivering frog. Which function of muscle tissue is being demonstrated?

Accepted Answer

Thermogenesis

Question 13

The thirteenth image shows two people jogging. Which muscle fiber type is most active during this activity, and what is a key feature of this fiber type?

Accepted Answer

Type I; high myoglobin content and fatigue resistance

Question 14

The fourteenth image shows a severed cable. Which muscle condition does this best represent, and what is a likely consequence?

Accepted Answer

Denervation; muscle atrophy

Question 15

The fifteenth image shows the organization of skeletal muscle. Which connective tissue layer surrounds individual muscle fibers?

Accepted Answer

Endomysium

Question 16

The sixteenth image shows a muscle and its connective tissue layers. What is the function of the tendon in this structure?

Accepted Answer

To transmit force from muscle to bone

Question 17

The seventeenth image shows a fascicle and its connective tissue. Which layer surrounds a fascicle?

Accepted Answer

Perimysium

Question 18

The eighteenth image shows a muscle fiber with labeled structures. Which structure is responsible for conducting action potentials along the muscle fiber?

Accepted Answer

Sarcolemma

Question 19

The nineteenth image quotes fascia as the largest system in the body. What is the primary function of fascia in the muscular system?

Accepted Answer

To separate and support muscles and other organs

Question 20

The twentieth image shows a cross-section of the arm. Which structure is responsible for separating muscle compartments?

Accepted Answer

Fascia

The Muscular System: Structure, Function, and Physiology

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