Question 1

Which of the following is a unique structural feature of cardiac muscle tissue compared to skeletal and smooth muscle?

Accepted Answer

Presence of intercalated discs between cells

Question 2

A patient is experiencing involuntary contractions in the walls of their stomach. Which type of muscle tissue is primarily responsible for this movement?

Accepted Answer

Smooth muscle

Question 3

Which property allows muscle tissue to return to its original length after being stretched?

Accepted Answer

Elasticity

Question 4

During a biceps curl, the biceps brachii acts as the prime mover. What is the role of the triceps brachii in this movement?

Accepted Answer

Antagonist

Question 5

Which connective tissue layer wraps around individual muscle fibers?

Accepted Answer

Endomysium

Question 6

What is the correct order of muscle structure from smallest to largest?

Accepted Answer

Myofilament, sarcomere, muscle fiber, fascicle, muscle organ

Question 7

Which type of skeletal muscle fiber is best suited for endurance activities such as marathon running?

Accepted Answer

Slow oxidative fibers

Question 8

A muscle cell’s ability to respond to a stimulus by generating an electrical charge is known as:

Accepted Answer

Excitability

Question 9

Which of the following best describes the arrangement of myofilaments in smooth muscle tissue?

Accepted Answer

Not arranged as myofibrils, resulting in no striations

Question 10

Which equation correctly represents the relationship between force ($$F$$), cross-sectional area ($$A$$), and muscle tension ($$T) in $$skeletal muscle?

Accepted Answer

$$F = T 	imes A$$

Question 11

A sprinter’s leg muscles are likely to have a higher proportion of which type of muscle fiber?

Accepted Answer

Fast glycolytic fibers

Question 12

Which protein covers the myosin-binding sites on actin during muscle relaxation?

Accepted Answer

Tropomyosin

Question 13

What is the primary function of the sarcoplasmic reticulum in skeletal muscle fibers?

Accepted Answer

Storage and release of calcium ions ($$Ca^{2+})$$

Question 14

Which of the following statements about skeletal muscle contraction is correct?

Accepted Answer

Myosin heads pull actin filaments toward the M-line during contraction

Question 15

Which connective tissue layer surrounds an entire skeletal muscle organ?

Accepted Answer

Epimysium

Question 16

If a muscle is attached to a bone via a tendon, which term describes the attachment point that moves during contraction?

Accepted Answer

Insertion

Question 17

Which of the following best explains why slow oxidative fibers appear red?

Accepted Answer

They contain a high amount of myoglobin

Question 18

Which muscle tissue type is responsible for voluntary movement of the body?

Accepted Answer

Skeletal muscle

Question 19

Which of the following is a function of synergist muscles?

Accepted Answer

Assist the prime mover in producing a movement

Question 20

Which of the following best describes the role of ATP in muscle contraction?

Accepted Answer

ATP binds to myosin heads, allowing them to detach from actin

The Muscular System: Structure and Function of Muscle Tissues 8.1

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