Question 1

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

Accepted Answer

Regulation of body temperature

Question 2

Which bone cell type is primarily responsible for bone resorption?

Accepted Answer

Osteoclast

Question 3

A patient presents with a fracture. Which of the following correctly lists the four steps in bone healing in order?

Accepted Answer

Hematoma formation, fibrocartilaginous callus formation, bony callus formation, bone remodeling

Question 4

Which hormone increases blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone (PTH)

Question 5

Which type of joint allows for the greatest range of motion?

Accepted Answer

Ball-and-socket

Question 6

Which of the following best describes the difference between compact bone and spongy bone?

Accepted Answer

Compact bone is dense and forms the outer layer of bones, while spongy bone is porous and found inside bones.

Question 7

Which of the following is a synarthrosis joint?

Accepted Answer

Suture

Question 8

A patient with osteoporosis is at increased risk for which of the following?

Accepted Answer

Pathological fractures

Question 9

Which of the following best describes the role of the sarcoplasmic reticulum (SR) in skeletal muscle contraction?

Accepted Answer

It stores and releases calcium ions necessary for contraction.

Question 10

During muscle contraction, which event occurs immediately after the action potential reaches the muscle fiber?

Accepted Answer

Release of calcium ions from the sarcoplasmic reticulum

Question 11

Which equation correctly represents the relationship between force, lever arm length, and torque in a lever system?

Accepted Answer

$T = F 	imes r$

Question 12

Which of the following muscle types is under voluntary control?

Accepted Answer

Skeletal muscle

Question 13

Which of the following best explains why muscle fatigue occurs during prolonged activity?

Accepted Answer

Accumulation of lactic acid and depletion of ATP

Question 14

Which of the following is the correct sequence of events at the neuromuscular junction?

Accepted Answer

Acetylcholine is released, binds to receptors, action potential is generated in the muscle fiber

Question 15

Which of the following best describes the difference between isotonic and isometric muscle contractions?

Accepted Answer

Isotonic contractions change muscle length, while isometric contractions maintain muscle length

Question 16

Which of the following is true regarding the role of vitamin D in bone health?

Accepted Answer

Vitamin D promotes calcium absorption and bone mineralization

Question 17

Which of the following best describes the function of ligaments?

Accepted Answer

Connect bone to bone and stabilize joints

Question 18

A patient is diagnosed with compartment syndrome. Which of the following best explains the underlying cause?

Accepted Answer

Increased pressure within a muscle compartment impairs blood flow and nerve function

Question 19

Which of the following correctly describes the action potential in a muscle cell?

Accepted Answer

Depolarization occurs due to Na$^+$ influx, followed by repolarization due to K$^+$ efflux

Anatomy & Physiology Study Guide: Skeletal System, Articulations, and Muscular System

Study Guide - Practice Questions