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A&P Lecture Exam

front 1

Which property of muscle gives it the ability to stretch without damage?

back 1

extensibility

front 2

This is the outermost layer of connective tissue surrounding a skeletal muscle.

back 2

epimysium

front 3

The contractile organelles of a skeletal muscle fiber are thread-like structures called

back 3

Myofibrils

front 4

Release of calcium from these structures triggers skeletal muscle contraction.

back 4

terminal cisterns of sarcoplasmic reticulum

front 5

Which of the following regions of a sarcomere contain thin filaments?

back 5

Both I band and A band

front 6

Myofibrils contain

back 6

all of these answers are correct.

front 7

What regulatory proteins can be found in the thin filaments of skeletal muscle fibers?

back 7

tropomyosin and troponin

front 8

Which of the regions of a sarcomere contain titin?

back 8

from M line to Z disc

front 9

What energizes the myosin head?

back 9

ATP hydrolysis reaction

front 10

Skeletal muscle contraction will continue to occur as long as the following chemicals are available in the cytosol of the muscle fiber.

back 10

Calcium ions and ATP

front 11

This is the least powerful type of skeletal muscle fiber.

back 11

slow oxidative fiber

front 12

Which of the following microscopic structures is only found in the cardiac muscle tissue?

back 12

intercalated discs

front 13

Which of the following types of muscle tissue contract when excited by their own autorhythmic muscle fibers?

back 13

cardiac muscle

front 14

Smooth muscle tone is maintained by the prolonged presence of _____ in the muscle cell’s cytosol?

back 14

Calcium ions

front 15

Which of the labeled structures on the diagram holds muscles with similar functions together, allows free movement of muscles, carries nerves, blood vessels and lymphatic vessels, and fills spaces between muscles?

back 15

B

front 16

In the diagram, the neurotransmitter, acetylcholine, is released from this area.

back 16

B

front 17

In the diagram, what is the basic functional unit of a myofibril?

back 17

F

front 18

In the diagram, where are thick filaments found?

back 18

E

front 19

Which of the following types of muscle tissue is capable of undergoing the stress-relaxation response when they are stretched?

back 19

single-unit smooth muscle fibers

front 20

Cross bridges are formed during muscle contraction when _____ on the thick filaments binds to _____ on the thin filaments.

back 20

myosin; actin

front 21

In a neuromuscular junction, the effect of acetylcholine (ACh) binding to receptors on the motor end plate lasts only briefly due to

back 21

rapid destruction of ACh in the synaptic cleft by acetylcholinesterase.

front 22

Which of following is a common characteristic of fast glycolytic (FG) skeletal muscle fibers?

back 22

high amount of glycogen in the sarcoplasm.

front 23

Which of the following is NOT a characteristic commonly used to name skeletal muscles?

back 23

Thickness of fibers

front 24

Where is the latissimus dorsi?

back 24

A

front 25

Where is the rectus femoris?

back 25

C

front 26

Where is the deltoid?

back 26

F

front 27

Where is the masseter?

back 27

E

front 28

Where is the gastrocnemius?

back 28

D

front 29

Where is the soleus?

back 29

E

front 30

Where is the external oblique?

back 30

G

front 31

Where is the masseter?

back 31

B

front 32

Where is the orbicularis oculi?

back 32

D

front 33

Where is the lateral rectus?

back 33

E

front 34

Where is the serratus anterior?

back 34

G

front 35

Where is the external oblique?

back 35

E

front 36

Where is the transverse abdominus?

back 36

H

front 37

Where is the infraspinatus?

back 37

G

front 38

Where is the rhomboid major?

back 38

I

front 39

Where is the brachioradialis?

back 39

C

front 40

Where is the flexor carpi radialis?

back 40

E

front 41

Where is the abductor digiti minimi?

back 41

E

front 42

Where is the quadratus lumborum?

back 42

A

front 43

Where is the sartorius?

back 43

C

front 44

Where is the vastus intermedius?

back 44

F

front 45

Where is the gracilis?

back 45

I

front 46

Which three muscles make up the hamstring?

back 46

L, M, N

front 47

Where is the semitendinosus?

back 47

L

front 48

A muscle that has three origins is called a

back 48

triceps

front 49

A muscle that raises or elevates a body part is called a

back 49

levator

front 50

A muscle that decreases the size of an opening is a

back 50

sphincter

front 51

Which of the following is a muscle whose insertion is found on the clavicle and acromion process of the scapula within the pectoral girdle?

back 51

trapezius

front 52

Which of the following types of joints lacks a joint cavity and is held together by a fibrous connective tissue?
1. Fibrous joints
2. Cartilaginous joints
3. Synovial joints

back 52

1 only

front 53

Which of the following types of joints do NOT have a synovial cavity?
1. Fibrous joints
2. Cartilaginous joints
3. Synovial joints

back 53

1 and 2

front 54

Which of the following types of joints do NOT have a synovial cavity?
1. Fibrous joints
2. Cartilaginous joints
3. Synovial joints

back 54

3 only

front 55

Moving the humerus laterally at the shoulder joint is an example of which type of movement?

back 55

Abduction

front 56

Which type of movement involves a continuous sequence of flexion, abduction, extension, and adduction resulting in a distal body part moving in a circle?

back 56

Circumduction

front 57

What type of special movement occurs in your clavicles at your acromioclavicular and sternoclavicular joints when you cross your arms in front of your body?

back 57

Protraction

front 58

Which special movement occurs when you bend your foot at the ankle in the direction of the foot’s superior surface as would occur when you stand on your heels?

back 58

Dorsiflexion

front 59

Which special movement involves moving your thumb across the palm to touch the tips of the fingers on the same hand?

back 59

Opposition

front 60

Which of the joints shown in the figure is classified as a multiaxial joint?

back 60

F

front 61

Which type of joint permits this type of movement?

1. Synovial joint
2. Cartilaginous joint
3. Fibrous joint

back 61

1 only

front 62

The line is pointing to the _____ ligament.

back 62

anterior cruciate

front 63

The line is pointing to the _____.

back 63

lateral meniscus

front 64

The line is pointing to the _____ ligament.

back 64

coracohumeral