Lab 2 - Skeletal Muscle

Question 1

Muscles attach to bones by way of (BLANK).

A) Cartilage
B) Tendons
C) Skin
D) Bones

Answer 1

B) Tendons

Muscles attach to bones by way of tendons.

Question 2

Muscles are covered with a layer of (BLANK).

A) Epimysium
B) Histone
C) Ppidermis
D) Helicase

Answer 2

A) Epimysium

Muscles are covered with a layer of epimysium.

Question 3

To what structure is this arrow pointing?

A) Perimysium
B) Bundle
C) Muscle fascicle
D) Ppimysium

Answer 3

C) Muscle fascicle

The arrow is pointing to a muscle fascicle, which is a bundle of muscle fibers grouped together.

Question 4

To what structure is this arrow pointing?

A) Bundle
B) Perimysium
C) Epimysium
D) Muscle fascicle

Answer 4

B) Perimysium

The arrow is pointing to the perimysium, the connective tissue that surrounds each muscle fascicle.

Question 5

What is the name of this structure?

A) Nucleus
B) Microglia cells
C) Gases
D) Subcutaneous fascia

Answer 5

A) Nucleus

The arrow is pointing to a nucleus, which is visible within a muscle fiber and is responsible for regulating cellular activities.

Question 6

To what structure is this arrow pointing?

A) Tendon
B) Actin
C) Myosin
D) Perimysium

Answer 6

C) Myosin

The arrow is pointing to myosin, the thick filament found in the center of the sarcomere, primarily located in the A-band and H-zone.

Question 7

To what structure is this arrow pointing?

A) Periosteum
B) Actin
C) Tendon
D) Myosin

Answer 7

B) Actin

The structures being shown by the arrows in this context are actin filaments, which are the thin, light-colored strands involved in muscle contraction.

Question 8

What is the name of these structures being show by the arrows?

A) Calcium
B) Troponin
C) Actin
D) Myosin

Answer 8

A) Calcium

Question 9

To what do these bind?

A) Actin
B) Nucleus
C) Troponin
D) Myosin

Answer 9

C) Troponin

In the image, the green arrows point to calcium ions. These calcium ions bind to the troponin complex on the actin filament.

Question 10

What is the name of this structure?

A) Myosin tail
B) Phosphate
C) ATP
D) Myosin head

Answer 10

D) Myosin head

The structure shown in the image with a bulb-like shape attached to a thicker red rod (filament) is the myosin head.

Question 11

How many muscles are in the human body?

A) 300
B) 600
C) 400
D) 500

Answer 11

B) 600

The human muscular system is made up of over 600 muscles, as mentioned in the video and confirmed by anatomical studies.

Question 12

Which of these is NOT one of the 5 major properties?

A) Excitable
B) Contractible
C) Actinable
D) Extensible

Answer 12

C) Actinable

“Actinable” is not one of the five major properties of muscles. The correct five major properties are:

1. Excitable
2. Contractible
3. Extensible
4. Elastic
5. Adaptable

Question 13

Enlarging of the muscle is referred to as?

A) Hypertrophy
B) Elasticity
C) Extensibility
D) Atrophy

Answer 13

A) Hypertrophy

Hypertrophy refers to the enlarging of a muscle due to increased workload or usage.

Question 14

Which of these is NOT one of the 5 types of movements?

A) Adduction
B) Flexion
C) Motivational
D) Abduction

Answer 14

C) Motivational

“Motivational” is not a type of muscle movement. The five types of movements are:

1. Adduction
2. Abduction
3. Flexion
4. Extension
5. Rotation

Question 15

Which one of these movements refers to moving “towards the body”?

A) Adduction
B) Flexion
C) Rotation
D) Abduction

Answer 15

A) Adduction

Adduction refers to the movement of a body part toward the midline of the body.

Question 16

Which term refers to bending a joint to decrease the angle between 2 bones or 2 body parts.

A) Extension
B) Adduction
C) Abduction
D) Flexion

Answer 16

D) Flexion

Flexion refers to bending a joint to decrease the angle between two bones or body parts.

Question 17

Which one of these are NOT one of the three types of muscles?

A) All of these are types of muscles
B) Skeletal
C) Visceral
D) Cardiac

Answer 17

A) All of these are types of muscles

Skeletal, Visceral (smooth), and Cardiac are indeed the three main types of muscles in the human body.

Question 18

Which one of these movements refers to moving “away from the body”?

A) Adduction
B) Abduction
C) Rotation
D) Flexion

Answer 18

B) Abduction

Abduction refers to moving a body part away from the midline of the body.

Question 19

(BLANK) attach a muscle to a bone.

A) Muscles
B) Fascia
C) Tendons
D) Ligaments

Answer 19

C) Tendons

Tendons attach a muscle to a bone.

Question 20

(BLANK) attach a muscle to a muscle.

A) Skin
B) Ligaments
C) Fascia
D) Tendons

Answer 20

C) Fascia

Fascia connects muscle to muscle and helps support and bind muscles together.