Question 1

Which of the following best describes a synovial joint?

Accepted Answer

A joint where bones are separated by a fluid-filled cavity, allowing free movement

Question 2

A patient presents with pain and swelling in the knee. Upon examination, you find that the synovial membrane is inflamed. What is the most likely diagnosis?

Accepted Answer

Synovitis

Question 3

Which of the following is a function of synovial fluid?

Accepted Answer

To nourish and lubricate the articular cartilage

Question 4

A third-class lever in the human body is best exemplified by which of the following movements?

Accepted Answer

Flexing the forearm at the elbow using the biceps brachii

Question 5

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

Accepted Answer

A tendon connects muscle to bone, while a ligament connects bone to bone

Question 6

Which of the following is a defining characteristic of cardiac muscle tissue?

Accepted Answer

It is involuntary and striated

Question 7

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

Accepted Answer

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

Question 8

Which of the following best explains the role of ATP in muscle contraction?

Accepted Answer

ATP is required for the detachment of myosin heads from actin filaments

Question 9

A patient is diagnosed with osteoarthritis. Which of the following best describes the primary pathology of this condition?

Accepted Answer

Degeneration of articular cartilage

Question 10

Which of the following muscle fiber types is most resistant to fatigue and is primarily used during endurance activities?

Accepted Answer

Type I (slow-twitch) fibers

Question 11

Which of the following best describes the function of the Z-disc in a sarcomere?

Accepted Answer

It anchors the thin filaments and defines the boundary of a sarcomere

Question 12

A 25-year-old athlete suffers an ACL tear. Which type of tissue is primarily damaged in this injury?

Accepted Answer

Dense regular connective tissue

Question 13

Which of the following statements about rheumatoid arthritis is correct?

Accepted Answer

It is an autoimmune disease that primarily affects synovial joints

Question 14

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

Accepted Answer

Fascicles are short and attach obliquely to a central tendon

Question 15

Which of the following is the correct order of events in the sliding filament theory of muscle contraction?

Accepted Answer

Calcium is released, myosin binds to actin, power stroke occurs, ATP binds to myosin causing detachment

Question 16

A patient is unable to extend their knee after a traumatic injury. Which muscle is most likely affected?

Accepted Answer

Rectus femoris

Question 17

Which of the following best describes the function of the articular cartilage in synovial joints?

Accepted Answer

It absorbs shock and reduces friction between articulating bones

Question 18

Which of the following is a characteristic unique to skeletal muscle tissue?

Accepted Answer

It is striated and under voluntary control

Question 19

Which of the following best explains why a second-class lever provides a mechanical advantage?

Accepted Answer

The load is located between the fulcrum and the effort, allowing a smaller effort to move a larger load

Question 20

Which of the following best describes the role of satellite cells in muscle tissue?

Accepted Answer

They repair damaged muscle fibers and contribute to muscle hypertrophy

Joints and Muscles: Structure, Function, and Classification – Anatomy & Physiology Study Guide

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