$$\text{ATP} \rightarrow \text{ADP} + \text{P}_i + \text{energy}$$

Question 1

Which type of joint allows the greatest range of movement in the human body?

Accepted Answer

Diarthrosis (synovial joint)

Question 2

A soccer player twists their ankle, turning the sole of the foot inward. What is the anatomical term for this movement?

Accepted Answer

Inversion

Question 3

Which joint type is found at the elbow and allows movement primarily in one plane?

Accepted Answer

Hinge

Question 4

During a bicep curl, which movement occurs at the elbow joint?

Accepted Answer

Flexion

Question 5

Which muscle tissue type is characterized by being voluntary, striated, and multinucleated?

Accepted Answer

Skeletal muscle

Question 6

What is the primary function of myoglobin in muscle fibers?

Accepted Answer

Stores oxygen for aerobic metabolism

Question 7

Which of the following best describes the 'treppe' or staircase effect in muscle contraction?

Accepted Answer

A graded increase in contraction strength with repeated stimulation

Question 8

A patient is unable to move their jaw forward to bite. Which joint movement is impaired?

Accepted Answer

Protraction

Question 9

Which of the following is TRUE regarding slow-twitch muscle fibers?

Accepted Answer

They contain more mitochondria and myoglobin

Question 10

Which equation best represents the conversion of chemical energy to mechanical energy during muscle contraction?

Accepted Answer

$$	ext{ATP} ightarrow 	ext{ADP} + 	ext{P}_i + 	ext{energy}$$

Question 11

Which structure in a synovial joint produces synovial fluid?

Accepted Answer

Synovial membrane

Question 12

What is the role of calcium ions ($$	ext{Ca}^{2+}) in $$skeletal muscle contraction?

Accepted Answer

They bind to troponin, causing tropomyosin to move and expose binding sites on actin

Question 13

Which joint movement is involved when you move your arm in a circular motion, such as pitching a baseball?

Accepted Answer

Circumduction

Question 14

A marathon runner's leg muscles are able to sustain activity for long periods. Which muscle fiber type predominates in their legs?

Accepted Answer

Slow-twitch fibers

Question 15

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

Accepted Answer

Ossification

Question 16

Which process is responsible for the propagation of an action potential along the sarcolemma?

Accepted Answer

Sequential opening of voltage-gated sodium channels

Question 17

Which joint movement occurs when you move your shoulders upward, as in shrugging?

Accepted Answer

Elevation

Question 18

Which of the following best describes the difference between a tendon and a ligament?

Accepted Answer

A tendon connects muscle to bone; a ligament connects bone to bone.

Question 19

Which joint movement is impaired in a patient who cannot move their leg away from the midline?

Accepted Answer

Abduction

Question 20

Which of the following is a real-life example of a pivot joint?

Accepted Answer

Atlantoaxial joint (between C1 and C2 vertebrae)

Joints and Muscles: Structure, Function, and Movement (Bio 141 Exam III Review)

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