Practical 2 - Connect Images Flashcards

(77 cards)

1
Q

Locate:
Nucleus of Skeletal Muscle Fiber

A
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2
Q

Locate:
Skeletal Muscle Fiber

A
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3
Q

Locate:
Branched Cardiac Muscle Fiber

A
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4
Q

Locate:
Intercalated Disc

A
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5
Q

Locate:
Nucleus of Cardiac Muscle Fiber

A
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6
Q

Locate:
Longitudinal Smooth Muscle Fiber

A
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7
Q

Locate:
Smooth Muscle Fiber

A
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8
Q

Locate:
Nucleus of Smooth Muscle Fiber

A
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9
Q

Locate:
Smooth Muscle Fiber

A
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10
Q

Locate:
Axon of Motor Neuron

A
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11
Q

Locate:
Motor End Plate

A
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12
Q

Locate:
Skeletal Muscle Fiber

A
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13
Q

LOOK AT IMAGE: Correctly label the following parts of a motor unit.

  1. Skeletal Muscle Fibers
  2. Spinal Cord
  3. Neuromuscular Junction
A
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14
Q

A motor unit is composed of

a. one motor neuron and one whole muscle.
b. several motor neurons and several muscle fibers.
c. one motor neuron and all of the muscle fibers it innervates.

A

one motor neuron and all of the muscle fibers it innervates.

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15
Q

Motor unit recruitment is the __________ of motor units to __________ the overall contraction strength of a muscle.

a. addition; decrease
b. addition; increase
c. subtraction; increase
d. subtraction; decrease

A

addition; increase

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16
Q

The major electrical activity measured by an EMG (electromyogram) is generated by

a. skeletal muscle only.
b. skeletal and smooth muscles only.
c. any type of muscle.
d. cardiac muscle only.

A

skeletal muscle only.

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17
Q

The electromyogram (EMG) mainly reflects

a. tension in the contracting muscle.
b. action potentials from the contracting muscle fibers.
c. action potentials from the motor neurons.
d. the movement of the contracting muscle.

A

action potentials from the contracting muscle fibers.

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18
Q

What is the relationship between electrical activity of a muscle and greater grip strength?

a. Electrical activity is independent of grip strength, meaning grip strength and electrical activity are not related.
b. They are indirectly related, meaning more grip strength produces less electrical activity.
c. They are directly related, meaning more grip strength produces more electrical activity.

A

They are directly related, meaning more grip strength produces more electrical activity.

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19
Q

CHECK ALL THAT APPLY: When grip strength increases,

a. action potential voltage increases.
b. action potential frequency decreases.
c. action potential frequency increases.
d. the number of active motor units increases.

A

Action potential frequency increases and the number of active motor units increases.

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20
Q

SELECT ALL THAT occurs when more motor neurons are sending action potentials to the same target muscle:

a. fewer motor units are activated
b. stronger muscle contraction
c. more motor units are active
d. this is called motor unit recruitment
e. each motor unit becomes larger
f. the muscle is less likely to fatigue

A

b. stronger muscle contraction
c. more motor units are active
d. this is called motor unit recruitment

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21
Q

SELECT ALL THAT an electromyogram can tell us:

a. if there is a potential problem with the nervous system
b. if there is a potential problem with the skeletal muscle system
c. if there is an ionic imbalance affecting muscle contraction
d. if a muscle is fatiguing

A

If there is a potential problem with the nervous system
AND
If there is a potential problem with the skeletal muscle system

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22
Q

True or False:
An electromyograph (EMG) can record contraction strength.

A

FALSE

An electromyograph (EMG) records electrical activity (action potentials) in muscles but does not directly measure contraction strength. However, the electrical activity can be correlated with contraction strength.

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23
Q

Locate:
Biceps brachii muscle

A
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24
Q

Locate:
Deltoid muscle

A
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25
Locate: Brachialis muscle
26
Locate: Subscapularis muscle
27
Locate: Brachioradialis muscle
28
Locate: Infraspintaus muscle
29
Locate: Lateral head of Triceps brachii muscle
30
Locate: Long head of Triceps brachii muscle
31
Locate: Supraspinatus muscle
32
Locate: Teres minor muscle
33
Locate: Biceps brachii muscle
34
Locate: Brachioradialis muscle
35
Locate: Flexor carpi radialis muscle
36
Locate: Flexor retinaculum muscle
37
Locate: Palmaris longus muscle
38
Locate: Pronator teres muscle
39
Locate: Extensor carpi ulnaris muscle
40
Locate: Extensor digiti minimi muscle
41
Locate: Extensor digitorum muscle
42
Locate: Extensor retinaculum of hand
43
Locate: Biceps brachii muscle
44
Locate: Brachialis muscle
45
Locate: Brachioradialis muscle
46
Locate: Deltoid muscle
47
Locate: Pectoralis major muscle
48
Locate: Subscapularis muscle
49
Locate: Surface projection of Cubital fossa
50
Locate: Deltoid muscle
51
Locate: Infraspinatus muscle
52
Locate: Supraspinatus muscle
53
Locate: Teres minor muscle
54
Locate: Triceps brachii muscle
55
Locate: Biceps brachii muscle
56
Locate: Brachialis muscle
57
Locate: Brachioradialis muscle
58
Locate: Flexor carpi radialis muscle
59
Locate: Palmaris longus muscle
60
Locate: Pronator teres muscle
61
Locate: Triceps brachii muscle
62
Locate: Hypothenar eminence
63
Locate: Thenar eminence
64
Locate: Biceps brachii muscle
65
Locate: Brachialis muscle
66
Locate: Brachioradialis muscle
67
Locate: Extensor carpi ulnaris muscle
68
Locate: Extensor digiti minimi muscle
69
Locate: Extensor digitorum muscle
70
Locate: Brachial Artery
71
Locate: Median cubital veins
72
Locate: Dorsal venous network of hand
73
Locate: Extensor carpi ulnaris muscle
74
Locate: Extensor digiti minimi muscle
75
Locate: Extensor digitorum muscle
76
Locate: Radial nerve and branches
77
Locate: Triceps brachii muscle