$$\text{Mechanical Advantage} = \frac{\text{Length of Effort Arm}}{\text{Length of Load Arm}}$$

Question 1

Which of the following is the primary function of muscle tissue in the human body?

Accepted Answer

Shortening muscle cells to generate movement

Question 2

The sarcolemma in muscle cells refers to:

Accepted Answer

The plasma membrane of the muscle cell

Question 3

Which protein is primarily responsible for the thick filaments in a sarcomere?

Accepted Answer

Myosin

Question 4

During muscle contraction, calcium ions are released from which structure?

Accepted Answer

Sarcoplasmic reticulum

Question 5

Which type of muscle tissue is responsible for squeezing fluids and other substances through hollow organs?

Accepted Answer

Smooth muscle

Question 6

A muscle that acts as a 'prime mover' in a movement is also called a(n):

Accepted Answer

Agonist

Question 7

Which of the following best describes the arrangement of fascicles in a multipennate muscle?

Accepted Answer

Fascicles insert into the tendon from all sides

Question 8

What is the correct formula for mechanical advantage in a lever system?

Accepted Answer

$$	ext{Mechanical Advantage} = \frac{	ext{Length of Effort Arm}}{	ext{Length of Load Arm}}$$

Question 9

Which muscle fiber type is most resistant to fatigue and relies primarily on aerobic metabolism?

Accepted Answer

Slow oxidative fibers (Type I)

Question 10

If a muscle crosses on the anterior side of a joint, what movement does it generally produce?

Accepted Answer

Flexion

Question 11

Which connective tissue sheath surrounds an individual muscle fiber?

Accepted Answer

Endomysium

Question 12

Which of the following is true about cardiac muscle tissue?

Accepted Answer

It is involuntary and found only in the heart

Question 13

Which structure marks the boundary of each sarcomere?

Accepted Answer

Z disc

Question 14

During an eccentric contraction, the muscle:

Accepted Answer

Generates force as it lengthens

Question 15

Which of the following muscle arrangements is best suited for producing the greatest range of motion?

Accepted Answer

Parallel

Question 16

Which compartment of the thigh contains muscles that extend the leg at the knee?

Accepted Answer

Anterior compartment

Question 17

Which term describes a muscle that helps the prime mover by adding extra force or reducing undesirable movements?

Accepted Answer

Synergist

Question 18

Which of the following is a correct description of the triad in skeletal muscle fibers?

Accepted Answer

One T-tubule flanked by two terminal cisterns

Question 19

Which muscle fiber type is best suited for short bursts of power and fatigues quickly?

Accepted Answer

Fast glycolytic fibers (Type IIx)

Question 20

Which of the following statements about muscle aging is correct?

Accepted Answer

Connective tissue increases and muscle fibers decrease with age

Muscle Anatomy and Mechanics: Study Notes for Anatomy & Physiology (EXS 111)

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