Question 1

Which property of muscle tissue allows it to respond to a stimulus, such as a nerve signal?

Accepted Answer

Excitability

Question 2

What is the primary function of cardiac muscle tissue?

Accepted Answer

Pumping blood through the cardiovascular system

Question 3

Which connective tissue layer surrounds individual muscle fibers?

Accepted Answer

Endomysium

Question 4

During muscle contraction, which band of the sarcomere remains constant in width?

Accepted Answer

A band

Question 5

Which protein in thin filaments binds calcium ions to initiate muscle contraction?

Accepted Answer

Troponin

Question 6

What is the correct sequence of events at the neuromuscular junction leading to muscle contraction?

Accepted Answer

Action potential arrives, ACh is released, Na+ channels open, muscle fiber depolarizes

Question 7

Which equation represents the formation of creatine phosphate in muscle cells?

Accepted Answer

$$ATP + creatine \rightarrow ADP + creatine\ phosphate$$

Question 8

Which type of muscle contraction occurs when muscle tension exceeds the load and the muscle shortens?

Accepted Answer

Isotonic concentric contraction

Question 9

A patient is unable to relax their muscles after death, resulting in rigor mortis. What is the primary cause?

Accepted Answer

Lack of ATP prevents cross-bridge detachment

Question 10

Which phase of a muscle twitch corresponds to the time needed for the action potential to propagate and calcium to be released?

Accepted Answer

Latent period

Question 11

What is the main source of ATP in skeletal muscle during peak activity when oxygen is limited?

Accepted Answer

Glycolysis

Question 12

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

Accepted Answer

Slow fibers

Question 13

Which hormone increases both the duration of stimulation and the force of muscle contraction?

Accepted Answer

Epinephrine

Question 14

What is the effect of increasing the load on a muscle during contraction?

Accepted Answer

The muscle shortens more slowly

Question 15

Which structural feature is unique to cardiac muscle cells and allows them to contract in rhythm?

Accepted Answer

Intercalated discs

Question 16

Which process describes the recycling of lactate produced during intense exercise?

Accepted Answer

Cori cycle

Question 17

Which type of muscle contraction develops tension but does not change muscle length?

Accepted Answer

Isometric contraction

Question 18

Which equation correctly represents the net gain of ATP during glycolysis?

Accepted Answer

$$Glucose \rightarrow 2\ pyruvate + 2\ ATP$$

Question 19

Which muscle tissue type is responsible for moving materials through the digestive tract?

Accepted Answer

Smooth muscle

Question 20

Which protein acts as a molecular spring to help restore sarcomere length after contraction?

Accepted Answer

Titin

Muscle Tissue: Structure, Function, and Physiology

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