Question 1

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

Accepted Answer

Elasticity

Question 2

A patient is exposed to botulinum toxin, which blocks acetylcholine release at the neuromuscular junction. What is the most likely effect on skeletal muscle contraction?

Accepted Answer

Muscle contraction will be weakened or paralyzed due to lack of stimulation.

Question 3

Which of the following best describes the organization of skeletal muscle from largest to smallest structure?

Accepted Answer

Muscle → Muscle fascicle → Muscle fiber → Myofibril → Sarcomere

Question 4

During muscle contraction, which ion is released from the sarcoplasmic reticulum to initiate the process?

Accepted Answer

Calcium ($$Ca^{2+})$$

Question 5

Which enzyme is responsible for breaking down acetylcholine in the synaptic cleft, thereby ending muscle contraction?

Accepted Answer

Acetylcholinesterase

Question 6

A marathon runner experiences muscle fatigue after prolonged exercise. Which of the following best explains this phenomenon?

Accepted Answer

Depletion of energy resources such as ATP and glycogen in muscle fibers

Question 7

Which type of muscle tissue is striated, contains intercalated discs, and is found only in the heart?

Accepted Answer

Cardiac muscle

Question 8

Which of the following is a correct statement about smooth muscle tissue?

Accepted Answer

It is long, slender, and single-nucleate.

Question 9

If a person stops using a particular muscle group for an extended period, what is the most likely outcome?

Accepted Answer

Atrophy: reduction in muscle size, tone, and elasticity

Question 10

Which of the following best explains why rigor mortis occurs after death?

Accepted Answer

Muscles run out of ATP and cannot pump calcium back into the sarcoplasmic reticulum.

Question 11

Which hormone is most likely to influence muscle growth and performance?

Accepted Answer

Testosterone

Question 12

A muscle fiber is stimulated by a neuron and contracts. Which neurotransmitter is released at the neuromuscular junction to trigger this event?

Accepted Answer

Acetylcholine

Question 13

Which of the following equations best represents the process of aerobic respiration in muscle cells?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + ATP$$

Question 14

Which muscle tissue type is controlled automatically via pacemaker cells and is striated?

Accepted Answer

Cardiac muscle

Question 15

A patient presents with tetanus, a condition caused by a neurotoxin affecting neurons. What is the most likely symptom?

Accepted Answer

Continuous and powerful muscle contractions

Question 16

Which of the following is NOT a function of muscle tissue?

Accepted Answer

Storage of calcium ions

Question 17

Which structure surrounds individual muscle fibers within a fascicle?

Accepted Answer

Endomysium

Question 18

Which of the following best describes the difference between cardiac and skeletal muscle cells?

Accepted Answer

Cardiac muscle cells are single-nucleate, striated, and contain intercalated discs.

Question 19

Which of the following muscle types is found in the digestive tract and is responsible for involuntary movements?

Accepted Answer

Smooth muscle

Muscle Tissue: Structure, Function, and Types (Chapter 10 Study Notes)

Guida di studio - Domande di pratica

Study guide - Flashcard