Question 1

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

Accepted Answer

Production of hormones such as insulin

Question 2

A patient presents with a bone fracture where the bone is shattered into several pieces. Which type of fracture is this most likely to be?

Accepted Answer

Comminuted fracture

Question 3

Which of the following bone markings is correctly matched with its function?

Accepted Answer

Foramen – passageway for blood vessels or nerves

Question 4

Which of the following best describes the difference between the male and female pelvis?

Accepted Answer

The female pelvis has a wider pelvic inlet and a broader pubic arch to facilitate childbirth.

Question 5

Which of the following equations correctly represents the relationship between force generated ($$F$$), number of motor units recruited ($$n$$), and average force per motor unit ($$f_{avg}) in $$skeletal muscle?

Accepted Answer

$$F = n 	imes f_{avg}$$

Question 6

A muscle twitch consists of three phases. Which phase is characterized by the release of calcium ions from the sarcoplasmic reticulum and the beginning of cross-bridge formation?

Accepted Answer

Contraction phase

Question 7

Which of the following best explains why calcium is essential for muscle contraction?

Accepted Answer

Calcium binds to troponin, causing tropomyosin to move and expose binding sites on actin.

Question 8

Which of the following bones is part of the axial skeleton?

Accepted Answer

Sternum

Question 9

A 7-year-old child’s X-ray shows a clear epiphyseal plate in the femur. What type of tissue is primarily found in this region?

Accepted Answer

Hyaline cartilage

Question 10

Which of the following best describes the phenomenon of wave summation in muscle physiology?

Accepted Answer

Increasing the frequency of stimulation before the muscle fully relaxes, resulting in greater force generation

Question 11

Which of the following is a distinguishing feature of cervical vertebrae compared to thoracic and lumbar vertebrae?

Accepted Answer

Presence of transverse foramina

Question 12

Which of the following correctly matches a bone with its associated landmark?

Accepted Answer

Humerus – deltoid tuberosity

Question 13

Which of the following best describes the function of fontanelles in a fetal skull?

Accepted Answer

Allow for compression of the skull during birth and brain growth after birth

Question 14

A patient is unable to abduct their arm at the shoulder joint. Which bone and landmark are most likely involved in this injury?

Accepted Answer

Humerus – greater tubercle

Question 15

Which of the following best describes the process of motor unit recruitment?

Accepted Answer

Increasing the number of active motor units to generate greater muscle force

Question 16

Which of the following equations correctly represents the calculation of the duration of the contraction phase ($$t_c) of a $$muscle twitch if the total twitch duration ($$t_{total}) is 120 ms$$, the latent period ($$t_l) is 10 ms$$, and the relaxation phase ($$t_r) is 50 ms$$?

Accepted Answer

$$t_c = t_{total} - t_l - t_r$$

Question 17

Which of the following is a characteristic of long bones?

Accepted Answer

They have a diaphysis and two epiphyses.

Question 18

Which of the following best describes fused (complete) tetanus in muscle physiology?

Accepted Answer

A sustained contraction with no visible relaxation between stimuli

Question 19

Which of the following structures is part of the appendicular skeleton?

Accepted Answer

Pelvic girdle

Question 20

A patient has a fracture at the distal end of the radius. Which type of bone is the radius classified as, and which part of the bone is fractured?

Accepted Answer

Long bone; epiphysis

Skeletal System and Muscle Physiology: Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard