Question 1

Which of the following correctly lists the connective tissue layers surrounding a skeletal muscle from outermost to innermost?

Accepted Answer

Epimysium, Perimysium, Endomysium

Question 2

A patient presents with muscle weakness. Laboratory tests reveal low extracellular calcium ion concentration. Which process in muscle contraction is most directly affected?

Accepted Answer

Release of acetylcholine at the neuromuscular junction

Question 3

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

Accepted Answer

$$T = \frac{F}{A}$$

Question 4

Which muscle is primarily responsible for the movement of the diaphragm during inspiration?

Accepted Answer

Diaphragm

Question 5

During a biceps curl, which muscle acts as the agonist?

Accepted Answer

Biceps brachii

Question 6

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

Accepted Answer

Blood cell formation

Question 7

A patient is unable to extend their forearm at the elbow. Which nerve is most likely damaged?

Accepted Answer

Radial nerve

Question 8

Which ion is primarily responsible for repolarization of the muscle cell membrane after an action potential?

Accepted Answer

K$$^+$$

Question 9

Which structure is the smallest functional unit of a skeletal muscle?

Accepted Answer

Sarcomere

Question 10

Which of the following best describes the role of acetylcholine (ACh) at the neuromuscular junction?

Accepted Answer

ACh binds to receptors on the sarcolemma, initiating an action potential

Question 11

Which muscle group is primarily responsible for chewing (mastication)?

Accepted Answer

Masseter and temporalis

Question 12

Which of the following best explains why cardiac muscle is involuntary?

Accepted Answer

It is controlled by the autonomic nervous system

Question 13

A blood sample is most commonly obtained from which anatomical site?

Accepted Answer

Median cubital vein

Question 14

Which equation correctly represents the calculation of muscle tone ($$MT) as $$the average tension ($$T_{avg}) $$over time ($$t$$)?

Accepted Answer

$$MT = \frac{T_{avg}}{t}$$

Question 15

Which muscle is part of the rotator cuff?

Accepted Answer

Supraspinatus

Question 16

Which of the following is a function of the calcaneal tendon?

Accepted Answer

Attaches the gastrocnemius and soleus muscles to the calcaneus

Question 17

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

Accepted Answer

Iliopsoas

Question 18

Which of the following best describes the function of the sarcomere?

Accepted Answer

It is the contractile unit of muscle fiber

Question 19

A patient has difficulty dorsiflexing the foot. Which muscle is most likely weakened?

Accepted Answer

Tibialis anterior

Question 20

Which of the following statements about muscle contraction is correct?

Accepted Answer

Calcium ions bind to troponin, causing tropomyosin to move and expose binding sites on actin

Muscular System: Structure, Function, and Anatomy Study Guide

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드