Question 1

Which property of muscle tissue is most directly responsible for converting chemical energy into mechanical energy during movement?

Accepted Answer

Contractility

Question 2

A muscle cell that is multinucleated, striated, and voluntary is most likely which type of muscle tissue?

Accepted Answer

Skeletal muscle

Question 3

You are examining a muscle tissue under a microscope and observe no striations. Which type of muscle tissue are you most likely viewing?

Accepted Answer

Smooth muscle

Question 4

Which layer of connective tissue surrounds and separates individual muscle fibers?

Accepted Answer

Endomysium

Question 5

A fascicle is best described as a bundle of:

Accepted Answer

Muscle fibers

Question 6

Arrange the following structures from superficial to deep in a skeletal muscle: Epimysium, Fascicle, Endomysium, Myofibrils, Sarcolemma, Myofilaments.

Accepted Answer

Epimysium → Fascicle → Endomysium → Sarcolemma → Myofibrils → Myofilaments

Question 7

The plasma membrane of a muscle fiber is called the ________, and it wraps bundles of ________.

Accepted Answer

Sarcolemma; myofibrils

Question 8

True or False: The smallest contractile unit of a muscle is the muscle cell.

Accepted Answer

False, the smallest contractile unit is the sarcomere.

Question 9

During muscle contraction, which filament slides toward the center of the sarcomere, shortening the muscle?

Accepted Answer

Actin

Question 10

Which type of muscle cell is typically the largest in diameter?

Accepted Answer

Skeletal muscle cell

Question 11

Which connective tissue layer would you expect to find most marbling (intramuscular fat) in a cut of beef?

Accepted Answer

Perimysium

Question 12

If a muscle fiber is unable to store and release $$\mathrm{Ca$$^{2+}$$}$$ ions, which organelle is most likely malfunctioning?

Accepted Answer

Sarcoplasmic reticulum

Question 13

Which protein forms the thick filament in the sarcomere and is responsible for pulling on the thin filament during contraction?

Accepted Answer

Myosin

Question 14

A patient is diagnosed with a congenital myosin storage myopathy. Which cellular structure is most likely affected?

Accepted Answer

Myofibril

Question 15

Which property of muscle tissue allows it to respond to a neural stimulus and initiate contraction?

Accepted Answer

Excitability

Question 16

Which of the following best describes the function of the T-tubules in a muscle fiber?

Accepted Answer

Transmit action potentials deep into the muscle fiber

Question 17

Which structure connects muscle to bone and is composed primarily of dense connective tissue?

Accepted Answer

Tendon

Question 18

During contraction, the length of which structure remains constant while the overlap between actin and myosin increases?

Accepted Answer

Filaments (actin & myosin)

Question 19

Which muscle tissue type is found in the walls of blood vessels and is responsible for involuntary movements?

Accepted Answer

Smooth muscle

Question 20

A muscle cell is observed to have a single nucleus and striations. Where is this cell most likely located?

Accepted Answer

In the heart

Muscle Tissue: Structure, Types, and Function in Anatomy & Physiology

Guida di studio - Domande di pratica

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