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Section 1: Structures of Skeletal Muscle

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

Which connective tissue surrounds an individual muscle fiber?

a)

Epimysium

b)

Perimysium

c)

Endomysium

d)

Sarcolemma

2.

A fascicle is best described as:

a)

A single muscle fiber

b)

A bundle of muscle fibers

c)

A bundle of myofibrils

d)

A connective tissue covering

3.

Which structure directly surrounds a fascicle?

a)

Endomysium

b)

Perimysium

c)

Epimysium

d)

Sarcoplasmic reticulum

4.

The connective tissue layer that covers the entire skeletal muscle is called:

a)

Endomysium

b)

Epimysium

c)

Perimysium

d)

Fascia

5.

Which organelle in the muscle fiber stores calcium ions needed for contraction?

a)

Sarcolemma

b)

Mitochondria

c)

Sarcoplasmic reticulum

d)

Myofibril

6.

The plasma membrane of a muscle cell is called the:

a)

Sarcomere

b)

Sarcolemma

c)

Sarcoplasm

d)

Endomysium

7.

Myofibrils are composed of repeating units called:

a)

Sarcoplasm

b)

Sarcomeres

c)

Endomysium

d)

Fascicles

8.

Which structure connects muscle to bone?

a)

Tendon

b)

Ligament

c)

Fascia

9.

Blood vessels in muscles are important because they:

a)

Control contraction

b)

Supply oxygen and nutrients

c)

Anchor tendons

d)

Replace damaged fibers

10.

Actin and myosin proteins are located within:

a)

Sarcoplasm

b)

Fascicles

c)

Myofibrils

d)

Epimysium

11.

The fixed attachment point of a muscle is called the:

a)

Insertion

b)

Origin

c)

Joint

d)

Tendon

12.

The movable attachment point of a muscle is called the:

a)

Origin

b)

Insertion

c)

Epimysium

d)

Fascia

13.

Which of the following is true about skeletal muscles?

a)

They push bones to move them

b)

They pull on bones to move them

c)

They contract and relax ligaments

d)

They expand joints directly

14.

A muscle that decreases the angle at a joint is called a:

a)

Extensor

b)

Flexor

c)

Rotator

d)

Stabilizer

15.

Muscles often work in:

a)

Isolation

b)

Antagonistic pairs

c)

Circular systems

d)

Without nerve input

16.

Which of the following provides signals to muscles to contract?

a)

Ligaments

b)

Tendons

c)

Nerves

d)

Blood vessels

17.

The abundant supply of blood vessels in muscles ensures:

a)

Faster bone growth

b)

Efficient nutrient and oxygen delivery

c)

Stronger tendon attachment

d)

Reduced nerve activity

18.

Which of the following is an example of a muscle named for its location?

a)

Biceps brachii

b)

Trapezius

c)

Deltoid

d)

Sartorius

19.

The trapezius muscle is named after its:

a)

Size

b)

Shape

c)

Action

d)

Location

20.

The gluteus maximus is named for its:

a)

Shape

b)

Size

c)

Action

d)

Fiber direction

21.

Which muscle name indicates it has two heads?

a)

Biceps brachii

b)

Triceps brachii

c)

Quadriceps femoris

d)

Deltoid

22.

Which muscle name indicates it has three heads?

a)

Biceps brachii

b)

Triceps brachii

c)

Quadriceps femoris

d)

Rectus femoris

23.

Orbicularis oculi is named for its:

a)

Shape and location

b)

Size and length

24.

Flexor carpi ulnaris is named for its:

a)

Location and action

b)

Shape and size

c)

Origin and insertion

d)

Fiber direction

25.

The sternocleidomastoid muscle is named for:

a)

Action only

b)

Shape and function

c)

Its points of attachment

d)

Fiber arrangement

26.

The deltoid muscle is named after:

a)

Its triangular shape

b)

Its action

c)

Its origin

d)

Its insertion

27.

Temporalis muscle is named based on:

a)

Shape

b)

Function

c)

Location

d)

Fiber direction

28.

A physiatrist is best described as a:

a)

Physical therapist

b)

Rehabilitation physician

c)

Athletic trainer

d)

Orthopedic surgeon

29.

Which of the following can a physical therapist NOT do?

a)

Prescribe medications

b)

Lead exercise programs

c)

Support rehabilitation

d)

Relieve symptoms through therapy

30.

A muscle strain occurs when:

a)

Muscle fibers are overstretched or torn

b)

Bone fractures occur

c)

Ligaments tear

d)

Tendons detach

31.

A “pulled muscle” refers to a:

a)

Ligament sprain

b)

Muscle strain

c)

Bone fracture

d)

Tendonitis

32.

A grade 2 muscle tear usually involves:

a)

Mild overstretching

b)

Partial tearing of fibers

c)

Complete rupture

d)

Only tendon injury

33.

Which muscle did Caleb injure in the case study?

a)

Pectoralis minor

b)

Pectoralis major

c)

Deltoid

d)

Serratus anterior

34.

Symptoms of a muscle tear may include all EXCEPT:

a)

Pain

b)

Swelling

c)

Loss of function

d)

Increased muscle strength

35.

Treatment for muscle tears may include:

a)

Rest, ice, physical therapy

b)

Ignoring the injury

c)

Immediate surgery in all cases

d)

Ligament replacement

36.

With proper treatment, Caleb will most likely:

a)

Never use his chest muscles again

b)

Regain function within months

c)

Require lifelong medication

d)

Lose mobility permanently

37.

Which type of muscle tissue is voluntary and striated?

a)

Smooth

b)

Skeletal

c)

Cardiac

d)

Elastic

38.

Which type of muscle tissue is found in the heart?

a)

Smooth

b)

Skeletal

c)

Cardiac

d)

Elastic

39.

Which type of muscle tissue is non-striated and involuntary?

a)

Smooth

b)

Skeletal

c)

Cardiac

d)

Voluntary

40.

Warming up muscles before activity helps because it:

a)

Weakens tendons

b)

Increases blood flow

c)

Reduces oxygen delivery

d)

Lowers flexibility

41.

The tibialis anterior muscle is located in the:

a)

Upper arm

b)

Chest

c)

Lower leg

d)

Shoulder

42.

Which muscle action would most likely cause injury to the pectoralis major?

a)

Gentle stretching

b)

Heavy weightlifting with the chest

c)

Walking

d)

Writing

43.

Which statement is TRUE about muscle function?

a)

Muscles push bones away from joints

b)

Muscles pull on bones to cause movement

c)

Muscles contract ligaments directly

d)

Muscles move blood vessels

44.

Which Latin root means “large”?

a)

Minimus

b)

Maximus

c)

Longus

d)

Brevis

45.

Which muscle pair is named for shape?

a)

Gluteus maximus & gluteus minimus

b)

Trapezius & rhomboid

c)

Biceps brachii & triceps brachii

d)

Flexor carpi ulnaris & extensor digitorum longus

46.
Which type of muscle cells are voluntary? 
a)
Skeletal
b)
Cardiac
c)
Medial 
d)
Smooth 
47.

What is shown in the colored part of this diagram?

a)

a whole muscle

b)

five muscle fibers

c)

five muscle fascicles

d)

five myofibrils

48.

Looking at the image in figure 5, what are the tiny rod-like structures that make up skeletal muscle fibers (muscle cells that help with movement)?

a)

myofibrils

b)

endomysium

c)

muscle fibers

d)

fascicles

49.

In a relaxed muscle, blocks the attachment site for the myosin crossbridge, thus preventing contraction

a)

troponin

b)

tropomyosin

c)

Ca++

d)

Mg++

50.

What do all muscle types require for contraction?

a)

Na+

b)

Ca2+

c)

K+

d)

Mg2+

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