$$\text{Stress} = \frac{F}{A}$$

Question 1

Which of the following is NOT a primary function of the skeletal system?

Accepted Answer

Production of hormones

Question 2

A patient presents with a fracture in the diaphysis of the femur. Which part of the long bone is affected?

Accepted Answer

The shaft of the bone

Question 3

Which bone cell type is primarily responsible for bone resorption?

Accepted Answer

Osteoclasts

Question 4

During childhood, which process allows bones to increase in length?

Accepted Answer

Endochondral ossification at the epiphyseal plate

Question 5

Which of the following best describes the axial skeleton?

Accepted Answer

It consists of the skull, vertebral column, and rib cage

Question 6

A deficiency in red bone marrow would most directly affect which physiological process?

Accepted Answer

Hematopoiesis

Question 7

Which joint type allows for the greatest range of motion?

Accepted Answer

Ball-and-socket joint

Question 8

Which equation best represents the relationship between force, lever arm, and torque in the musculoskeletal system?

Accepted Answer

$$T = F 	imes r$$

Question 9

Which muscle tissue type is under voluntary control and characterized by striations?

Accepted Answer

Skeletal muscle

Question 10

A patient is unable to flex their elbow due to nerve damage. Which structure is most likely affected?

Accepted Answer

Neuromuscular junction

Question 11

Which property allows muscle tissue to return to its original length after contraction?

Accepted Answer

Elasticity

Question 12

Which equation describes the resting membrane potential of a muscle cell?

Accepted Answer

$$V_m = \frac{RT}{F} \ln \left( \frac{[K^+]_{out}}{[K^+]_{in}} \right)$$

Question 13

Which muscle group is primarily responsible for knee extension?

Accepted Answer

Quadriceps group

Question 14

Which structure connects muscle to bone and transmits the force of contraction?

Accepted Answer

Tendon

Question 15

Which process occurs at the neuromuscular junction to initiate muscle contraction?

Accepted Answer

Release of acetylcholine from the motor neuron

Question 16

Which muscle is primarily responsible for inspiration during breathing?

Accepted Answer

Diaphragm

Question 17

Which of the following best describes the difference between origin and insertion of a muscle?

Accepted Answer

Origin is the fixed attachment, insertion moves with contraction

Question 18

Which muscle property is essential for the transmission of electrical signals?

Accepted Answer

Excitability

Question 19

A patient with osteoporosis has decreased bone density. Which bone cell activity is most likely increased?

Accepted Answer

Osteoclast activity

Question 20

Which equation best represents the relationship between muscle force, cross-sectional area, and stress?

Accepted Answer

$$	ext{Stress} = \frac{F}{A}$$

Skeletal & Muscular System: Key Concepts and Structures

Study Guide - Practice Questions