Question 1

Which of the following is NOT a characteristic shared by all muscle tissue types?

Accepted Answer

Ability to conduct bone remodeling

Question 2

A patient is unable to consciously control the contraction of a certain muscle. Which type of muscle tissue is most likely involved?

Accepted Answer

Cardiac muscle

Question 3

Which of the following best describes the function of the sarcoplasmic reticulum in skeletal muscle fibers?

Accepted Answer

It stores and releases $$\mathrm{Ca$$^{2+}$$}$$ ions to regulate muscle contraction.

Question 4

Which connective tissue sheath surrounds individual muscle fibers?

Accepted Answer

Endomysium

Question 5

A muscle is attached to a bone via a ropelike structure. This type of attachment is called:

Accepted Answer

Indirect attachment

Question 6

Which of the following is the smallest contractile unit of a skeletal muscle fiber?

Accepted Answer

Sarcomere

Question 7

During muscle contraction, which protein forms cross-bridges with actin?

Accepted Answer

Myosin

Question 8

A patient with Duchenne muscular dystrophy (DMD) has a mutation affecting which protein, leading to muscle fiber damage?

Accepted Answer

Dystrophin

Question 9

Which of the following best explains why skeletal muscle fibers require a rich blood supply?

Accepted Answer

To provide nutrients and remove waste products during rapid contractions

Question 10

Which of the following is a function of muscle tissue that is especially important for maintaining homeostasis during cold weather?

Accepted Answer

Generating heat as they contract

Question 11

Which of the following statements about the sliding filament model of muscle contraction is correct?

Accepted Answer

Myosin heads pull actin filaments toward the center of the sarcomere.

Question 12

Which muscle tissue type is found in the walls of hollow organs such as the stomach and urinary bladder?

Accepted Answer

Smooth muscle

Question 13

A triad in skeletal muscle consists of:

Accepted Answer

One T tubule and two terminal cisterns

Question 14

Which of the following best describes the arrangement of thick and thin filaments in a sarcomere?

Accepted Answer

Thin filaments are anchored to Z discs; thick filaments are connected at the M line.

Question 15

A muscle biopsy reveals single, fusiform, non-striated cells. Which muscle type is this?

Accepted Answer

Smooth muscle

Question 16

Which of the following prefixes is commonly used in terms related to muscle tissue?

Accepted Answer

Myo-

Question 17

A patient presents with muscle weakness and frequent falls. Genetic testing reveals a sex-linked recessive disorder. Which of the following is most likely true?

Accepted Answer

The patient has Duchenne muscular dystrophy, affecting dystrophin.

Question 18

Which of the following best describes the function of T tubules in skeletal muscle fibers?

Accepted Answer

They allow electrical nerve transmissions to reach deep into the muscle fiber.

Question 19

Which of the following is a regulatory protein bound to actin in thin filaments?

Accepted Answer

Both tropomyosin and troponin

Question 20

Which of the following best explains why cardiac muscle can contract without conscious control?

Accepted Answer

It has its own pacemaker cells that generate rhythmic contractions.

Ch 9A Muscles and Muscle Tissue: Structure and Function

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드