Quiz 2

Question 1

The contrile unit of a muscle cell is called a(n):

Answer 1

A. A-band

B. I-band

C. muscle fiber

D. sarcomere

Question 2

Synovial fluid is composed of:

Answer 2

A. Blood

B. cartilage

C. plasmas albumin proteins and water

D. triglycerides

Question 3

What type of skeletal joint is the arrow pointing to in this picture? Labeld E

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Answer 3

A. Syndesmoses

B. gomphosis

C. symphysis

D. Suture

E. diarthrosis

Question 4

which of these terms describes smooth muscle tissue?

Answer 4

A. striated

B. voluntary

C. contains sarcomeres

D. located in the walls of hollow structures

Question 5

Which of the terms associated with a synovial joint are mismatched?

Answer 5

A. synovial fluid: reduces friction between articulating bones

B. bursae: provides cushion so that bone doesn’t rub against soft tissue

C. articular discs: encloses the synovial cavity

D. articular cartilage: hyaline cartilage that reduces friction between bones

Question 6

The connective tissue that surrounds a muscle fascicle is called:

Answer 6

A. endomysium

B. epimysium

C. elastic cartilage

D. perimysium

Question 7

T/F

A syndesmosis is classified structually as a slightly movable joint.

Answer 7

False

A syndesmosis is classified functionally as a slightly movable joint

Question 8

T/F

Muscle fascicles that arranged as shown below are referred to as pennate

Answer 8

false

muscle fascicles that are arranged as shown below are referred to as multipennate

Question 9

T/F

The rotation of the humerous is such a way as to move the forearm away from the midline of the body as shown in the picutre below is called medial rotation

Answer 9

False

away from the midline of the body as shown in the picture below is called lateral rotation

Question 10

T/F

The shoulder joint is considered a saddle joint

Answer 10

False

The shoulder joint is considered a ball-and-socket joint

Question 11

T/F

The rotator cuff consists of 4 muscles

Answer 11

True

Question 12

T/F

The articulation formed between a tooth and its bony socket (alveolus) is functionally classified as a fibrous joint

Answer 12

False

The articulation formed between a tooth and its bony socket is functionally classified as a synarthrotic joint

Question 13

Answer 13

plantar flexion

Question 14

Answer 14

Dorsiflexion

Question 15

each of these pictures represent a special types of synovial joint movements. Each is classified as a type of flexion. Give one reason why both are classified as flexion.

Answer 15

the flexion is relative to the surface of the foot and decreasing the angle between the surface of the foot and lower limb

Question 16

A-bands

Answer 16

striation caused by difference in appearance due to orientation

Question 17

I-bands

Answer 17

part of a striation caused by having the same appearance, independent of orientation

Question 18

actin

Answer 18

composed of globular protiens having active sites for cross-bridge formation

Question 19

filament

Answer 19

contractile componet composed of either thick or thin threads of protein

Question 20

H-zone

Answer 20

region of a sarcomere that appears bright and polarized microscopy; disapears when the sarcomere is fully contracted

Question 21

myosin

Answer 21

composed of pivoting “heads” and protein fibers that form cross-bridges

Question 22

Titan

Answer 22

large elastic protein that is found in sarcomeres to allow muscles to relax

Question 23

tropomyosin

Answer 23

regulatory protein that changes shape to expose active sites for cross-bridges

Question 24

troponin

Answer 24

regulatory protein that binds calcium to facilitate cross-bridge formation

Question 25

Z-line

Answer 25

makes up the border of sarcomeres where protein discs act as spacers

Question 26

the basis of joint classification in terms of structual vs. functional

Answer 26

Structurally: based on composition of the joint and presence/ absence of synovial cavity functionally: based on degree of movement

Question 27

which factor does not affect movement of a joint

Answer 27

A. the flexibilty of the ligaments **_B. whether the bone is composed of compact or spongy tissue _** C. the shape of the articulating bones D. the tension of associated muscles and tendons

Question 28

which type of skeletal joint is shown in this picture? ![]()

Answer 28

A. syndesmoses B. gomphosis C. symphyses **_D. suture_** E. diarthrosis

Question 29

which does not describe cardiac muscle

Answer 29

A. striated **_B. voluntary_** C. limited capacity for regeneration D, composed of branched muscle fibers

Question 30

The connective tissue that surrounds an entire muscle such as the biceps branchii, is called

Answer 30

A. edomysium **_B. epimysium_** C. elastic cartilage D. hyalin cartilage E. perimysium

Question 31

T/F A syndesmosis is classified functionally as a slightly moveable joint

Answer 31

False An **_amphiarthrosis_** is classified....

Question 32

T/F muscle fascicles that are arranged as shown below are referred to as pennate ![]()

Answer 32

false referred to as **_triangular_**

Question 33

T/F A defining characteristic of hyalin cartilage is that is consists of closely spaced chondrocytes surrounded by visible elastic fibers

Answer 33

false a defining characteristic of **elastic cartilage**

Question 34

T/F The guides that are used in making precise cuts to bone tissue in a total knee replacement are called jigs

Answer 34

True

Question 35

T/F A skeletal muscle that has fully contracted will contain sarcomeres with a visible bright region in each sarcomere called z-line

Answer 35

False A skeletal muscle that has fully **_relaxed_** will contain sarcomeres with a visible bright region in each sarcomere called the **_H-zone_**