Question 1

Which connective tissue layer surrounds an individual muscle fiber?

Accepted Answer

Endomysium

Question 2

What is the primary cause of rigor mortis after death?

Accepted Answer

Lack of ATP preventing detachment of myosin from actin

Question 3

Which structure is responsible for storing and releasing calcium ions during muscle contraction?

Accepted Answer

Sarcoplasmic reticulum

Question 4

The functional unit of a skeletal muscle fiber is the:

Accepted Answer

Sarcomere

Question 5

Which of the following best describes the role of T tubules in muscle contraction?

Accepted Answer

They transmit action potentials deep into the muscle fiber

Question 6

Which property of muscle tissue allows it to respond to a stimulus?

Accepted Answer

Excitability

Question 7

A fascicle is best defined as:

Accepted Answer

A bundle of muscle fibers surrounded by perimysium

Question 8

Which band in the sarcomere contains only thin filaments?

Accepted Answer

I band

Question 9

During muscle contraction, calcium ions bind to which protein to initiate the process?

Accepted Answer

Troponin

Question 10

Which connective tissue layer directly surrounds a fascicle?

Accepted Answer

Perimysium

Question 11

If a muscle loses its ability to conduct electrical impulses, which property has been compromised?

Accepted Answer

Excitability

Question 12

Which of the following is the correct sequence of connective tissue layers from innermost to outermost in a skeletal muscle?

Accepted Answer

Endomysium, Perimysium, Epimysium

Question 13

A patient with a genetic defect in the sarcoplasmic reticulum would most likely have problems with:

Accepted Answer

Releasing calcium ions for muscle contraction

Question 14

Which of the following best describes the Z disk in a sarcomere?

Accepted Answer

It anchors thin filaments and defines the boundaries of a sarcomere

Question 15

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

Accepted Answer

Elasticity

Question 16

A muscle fiber is stimulated and contracts. Which equation best represents the relationship between force ($$F$$), cross-sectional area ($$A$$), and muscle tension ($$T$$)?

Accepted Answer

$$F = T 	imes A$$

Question 17

Which of the following scenarios best illustrates the property of contractility in muscle tissue?

Accepted Answer

A muscle fiber responds to a nerve impulse by shortening

Question 18

Which of the following is NOT a function of the sarcoplasmic reticulum?

Accepted Answer

Synthesizing ATP

Question 19

A muscle fiber's ability to be stretched beyond its resting length without being damaged is called:

Accepted Answer

Extensibility

Question 20

Which of the following best describes the relationship between the sarcomere, myofibril, and muscle fiber?

Accepted Answer

A muscle fiber contains myofibrils, which are composed of sarcomeres

Chapter 10: Structure and Function of Skeletal Muscle Tissue

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