Q: Which equation represents the direct phosphorylation pathway for ATP generation in skeletal muscle?

$$\text{Creatine phosphate} + \text{ADP} \rightarrow \text{Creatine} + \text{ATP}$$

Q: Which equation represents aerobic respiration in muscle cells?

$$\text{Glucose} + \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O} + \text{ATP}$$

Question 1

Which connective tissue layer directly surrounds each individual skeletal muscle fiber?

Accepted Answer

Endomysium

Question 2

A patient presents with muscle weakness and difficulty breathing. Laboratory tests reveal antibodies against acetylcholine receptors. Which disorder is most likely?

Accepted Answer

Myasthenia Gravis

Question 3

Which muscle tissue type is responsible for involuntary contractions in the walls of hollow organs, and what is its cellular appearance?

Accepted Answer

Smooth muscle; spindle-shaped, uninucleate, non-striated cells

Question 4

During muscle contraction, which event occurs according to the sliding filament model?

Accepted Answer

Thin filaments slide past thick filaments, shortening the sarcomere

Question 5

Which equation represents the direct phosphorylation pathway for ATP generation in skeletal muscle?

Accepted Answer

$$	ext{Creatine phosphate} + 	ext{ADP} ightarrow 	ext{Creatine} + 	ext{ATP}$$

Question 6

Which structure anchors thin filaments in a sarcomere?

Accepted Answer

Z disc

Question 7

A person experiences 'goosebumps' when cold or frightened. Which muscle type and nervous system division are responsible?

Accepted Answer

Smooth muscle; autonomic nervous system

Question 8

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

Accepted Answer

Stores and releases calcium ions for muscle contraction

Question 9

Which of the following is TRUE regarding cardiac muscle?

Accepted Answer

It contains intercalated discs and is striated

Question 10

Which connective tissue structure transmits force from muscle to bone and is composed mainly of collagen fibers?

Accepted Answer

Tendon

Question 11

Which process allows smooth muscle to adapt to stretching, such as in the urinary bladder?

Accepted Answer

Stress-relaxation response

Question 12

What is the immediate source of energy for muscle contraction?

Accepted Answer

ATP

Question 13

Which muscle tissue type can undergo hyperplasia (increase in cell number) in adults?

Accepted Answer

Smooth muscle

Question 14

Which of the following best describes the arrangement of myofilaments in skeletal muscle?

Accepted Answer

Organized into sarcomeres, creating striations

Question 15

Which equation represents aerobic respiration in muscle cells?

Accepted Answer

$$	ext{Glucose} + 	ext{O}_2 ightarrow 	ext{CO}_2 + 	ext{H}_2	ext{O} + 	ext{ATP}$$

Question 16

Which structure is a sheetlike connective tissue that attaches muscles indirectly to bones or other muscles?

Accepted Answer

Aponeurosis

Question 17

Which event occurs during rigor mortis?

Accepted Answer

Absence of ATP prevents cross bridge detachment, causing muscle stiffness

Question 18

Which muscle contraction type involves increased tension without shortening or movement?

Accepted Answer

Isometric contraction

Question 19

Which structure is responsible for the banding pattern seen in skeletal muscle fibers?

Accepted Answer

Myofibrils

Question 20

Which statement about muscle fiber contraction is correct?

Accepted Answer

A muscle fiber contracts fully or not at all ('all or none' principle)

Nervous and Muscular Tissue: Structure, Function, and Physiology

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