Question 1

Which of the following best describes a uniaxial synovial joint, and which movement does it primarily allow?

Accepted Answer

A joint that allows movement in one plane; primarily flexion and extension

Question 2

Which connective tissue layer directly surrounds individual muscle fibers in a skeletal muscle?

Accepted Answer

Endomysium

Question 3

A patient suffers damage to the sarcolemma of their skeletal muscle cells. Which function is most likely to be impaired?

Accepted Answer

Transmission of action potentials along the muscle fiber

Question 4

Which muscle is located in the abdominal wall and is responsible for compressing the abdomen?

Accepted Answer

Transversus abdominis

Question 5

During muscle contraction, which structure stores and releases calcium ions necessary for contraction?

Accepted Answer

Sarcoplasmic reticulum

Question 6

Which of the following muscles is part of the quadriceps group and is NOT visible on a superficial muscle model?

Accepted Answer

Vastus intermedius

Question 7

A person is unable to flex their forearm at the elbow. Which muscle is most likely injured?

Accepted Answer

Biceps brachii

Question 8

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

Accepted Answer

It anchors thin filaments and marks the boundary between adjacent sarcomeres

Question 9

Which muscle is responsible for elevating the shoulders (shrugging)?

Accepted Answer

Trapezius

Question 10

Which of the following is a function of the synaptic vesicle at the neuromuscular junction?

Accepted Answer

Releasing acetylcholine into the synaptic cleft

Question 11

A soccer player tears their rectus femoris muscle. Which movement will be most affected?

Accepted Answer

Extension of the knee

Question 12

Which equation correctly represents the relationship between force ($$F$$), mass ($$m$$), and acceleration ($$a) $$during muscle contraction?

Accepted Answer

$$F = m 	imes a$$

Question 13

Which muscle is primarily responsible for flexing the thigh at the hip joint?

Accepted Answer

Iliopsoas

Question 14

Which of the following structures is the site where the motor neuron communicates with the muscle fiber?

Accepted Answer

Neuromuscular junction

Question 15

A patient presents with difficulty extending their leg at the knee. Which muscle group is most likely affected?

Accepted Answer

Quadriceps femoris

Question 16

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

Accepted Answer

Production of red blood cells

Question 17

Which muscle is located in the leg and is responsible for plantar flexion of the foot?

Accepted Answer

Gastrocnemius

Question 18

Which of the following best describes the role of mitochondria in skeletal muscle cells?

Accepted Answer

Production of ATP for muscle contraction

Question 19

Which muscle is responsible for adducting the thigh?

Accepted Answer

Adductor magnus

Question 20

Which of the following correctly matches the muscle to its location?

Accepted Answer

Temporalis – Head & Neck

Synovial Joints, Movements, and Skeletal Muscle Structure & Identification

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