Question 1

Which ligament is primarily responsible for preventing anterior displacement of the tibia relative to the femur in the knee joint?

Accepted Answer

Anterior cruciate ligament

Question 2

A patient presents with a torn lateral meniscus. Which bone articulates directly with the meniscus in the knee joint?

Accepted Answer

Femur

Question 3

During shoulder abduction, which muscle is primarily responsible for initiating the movement?

Accepted Answer

Supraspinatus

Question 4

Which structure stores calcium ions necessary for muscle contraction?

Accepted Answer

Sarcoplasmic reticulum

Question 5

A football player suffers a knee injury and is unable to extend his leg. Which muscle is most likely affected?

Accepted Answer

Rectus femoris

Question 6

Which equation best represents the relationship between force ($$F$$), muscle cross-sectional area ($$A$$), and muscle tension ($$T$$)?

Accepted Answer

$$F = T 	imes A$$

Question 7

Which muscle is responsible for flexion of the forearm at the elbow joint?

Accepted Answer

Brachialis

Question 8

A patient with damage to the glenohumeral ligament would most likely experience instability in which joint?

Accepted Answer

Shoulder joint

Question 9

Which muscle is involved in dorsiflexion of the foot?

Accepted Answer

Tibialis anterior

Question 10

The triad in skeletal muscle fibers consists of which three structures?

Accepted Answer

Two terminal cisternae and one transverse (T) tubule

Question 11

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

Accepted Answer

Iliacus

Question 12

If the patellar ligament is damaged, which movement would be most affected?

Accepted Answer

Extension of the knee

Question 13

Which muscle is involved in chewing and elevates the mandible?

Accepted Answer

Masseter

Question 14

A patient is unable to extend their wrist. Which muscle is most likely injured?

Accepted Answer

Extensor carpi radialis longus

Question 15

Which equation describes the relationship between muscle contraction velocity ($$v$$), muscle fiber length ($$L$$), and contraction time ($$t$$)?

Accepted Answer

$$v = \frac{L}{t}$$

Question 16

Which muscle is responsible for lateral rotation of the arm at the shoulder joint?

Accepted Answer

Infraspinatus

Question 17

A patient with a torn tibial collateral ligament would most likely experience instability in which direction?

Accepted Answer

Medial instability of the knee

Question 18

Which muscle is involved in flexion of the fingers?

Accepted Answer

Flexor digitorum profundus

Question 19

Which structure surrounds individual muscle fibers?

Accepted Answer

Endomysium

Question 20

A patient presents with difficulty in flexing the hip and extending the knee. Which two muscles are most likely affected?

Accepted Answer

Iliacus and rectus femoris

Joints and Muscles: Key Structures and Functions (Lab Exam 2 Study Guide)

Study Guide - Practice Questions