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Skeletal Muscle Tissue Flashcards | StudBud
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Skeletal Muscle Tissue
Skeletal Muscle Tissue
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1
Muscle physiology reflex < or > the number of motor units engaged according to the effort required 4 a movement?
Sliding filament
Graded response
Muscle recruitment
Myo-magnification
2
What is the function of a tendon?
Connect muscles to bone
Stabilizing joints
Increasing the force of contraction
Connect bone to bone
3
when pain or limitation is present with both active and passive range of motion in one direction?
Muscle
Aponeurosis
Ligament
Tendon
4
What type of muscle contraction maintains our posture and each muscle's state of readiness to contract fully?
Isotonic
Tonic
Tentanic
Isometric
5
What is the common function for all of the quadriceps?
Hip flexion
Hip extension
Knee extension
Knee flexion
6
What is the common function of the brachioradialis, brachialis, and biceps brachii muscles?
Knee flexion
Elbow flexion
Elbow extension
Hip flexion
7
Which of the following is an accurate description of a motor unit?
1 motor neuron + multiple muscle fibers
1 motor neuron + multiple sarcomeres
1 sensory neuron + 1 motor neuron + 1 muscle
Multiple motor neurons + multiple muscle fibers 1 motor neuron + mult
8
What is the function of retinaculi in the muscular system?
Separating the muscle groups in the thigh
Attaching abdominal muscles to the ribcage
Serves as the central tendon of the diaphragm
Tension straps that hold tendons in place
9
What is the anatomic name for a skeletal muscle cell?
Myofilament
Myofiber
Myofibril
Sarcomere
10
What class of lever are most joints of the body?
1st
3rd
4th
2nd
11
Muscle has fascicles w/ shorter fibers running in an oblique line to a central tendon, what category of muscle articu.?
Triangular
Pennate
Parallel
Fusiform
12
What method of energy production creates lactic acid and the largest oxygen debt?
Kreb's Cycle
Aerobic glycolysis
Direct phosphorylation
Anaerobic cellular metabolism
13
Why is the strength of a contraction decreased when the muscle is already in a shortened position?
overlap between actin and myosin is < so fewer bonding sites are avail.
Most of the binding sites between actin and myosin have already been used
binding sites on actin are hidden when the muscle fiber is shortened
partially shortened, there is very little energy left for full contraction
14
Name the physiologic theory that explains the relationship b/t muscle length & the force generated by its contraction.
Length-strength ratio
Positional contraction force
Long force theory
Force generation ratio
15
In the direct phosphorylation method of energy production, what substance is broken down to replenish the ATP?
Phosphorus
ADP
Creatine-phosphate
Glycophospherus
16
How does the muscular system help maintain body temperature?
Increased muscle tension when cold signals thebrain to increase metabolism
Heat is generated as a byproduct of musclecontraction
Skeletal muscles have their own set of sweatglands to dissipate heat
Cold, brain inhibits muscle contracts 2 shift energy toward heat production
17
What is the common function for all of the quadriceps?
Hip flexion
Hip extension
Knee flexion
Knee extension
18
A skeletal muscle fiber, or muscle cell, is made up of smaller fibers called:
Myofilaments
Fibrous myocytes
Myofibrils
Myofibers
19
What kind of contraction occurs in the hamstrings when we bend our knee to climb stairs?
Tonic
Concentric
Isometric
Eccentric
20
Which of these back muscles elevates, retracts, and upwardly rotates the scapula?
Trapezius
Latissimus Dorsi
Levator scapula
Rhomboids
21
What movement role is a muscle playing when it assists larger muscles during a particular motion?
Synergist
Antagonist
Agonist
Stabilizer
22
Muscles that abduct the hip include the gluteus medius, gluteus minimus, and:
Psoas major
Iliacus
Gluteus maximus
Tensor fascia latae
23
Which of the hamstring muscles inserts on the head of the fibula?
Biceps Femoris
Semimembranosis
Semitendinosis
Rectus Femoris
24
What type of muscle contraction increases muscle tension, but does not result in movement?
Tonic
Isotonic
Isometric
Eccentric
25
Which method of energy production generates the highest amount of ATP?
Anaerobic glycolysis
Direct phosphorylation
Aerobic cellular metabolism
Anaerobic metabolism
26
What movement role is assigned to the muscles that hold the scapula and clavicle in place during shoulder motions?
Antagonist
Fixator
Synergist
Agonist
27
What fascial layer forms the outer envelope of the muscle and anchors it to the hypodermis?
Perimysium
Extramysium
Endomysium
Epimysium
28
What type of muscle contraction maintains our posture and each muscle's state of readiness to contract fully?
Tonic
Isotonic
Tetanic
Isometric
29
Which of these muscles serves as a major stabilizer and has no movement function?
Subclavius
Pectoalis Minor
Serratus anterior
Teres Minor
30
Which of these skeletal muscles is a type of pennate muscle?
Gastrocnemius
Pectoralis Major
Deltoid
Orbicularis Oris
31
What connective element of skeletal muscle is described as the tenoperiosteal junction?
transitional tissue zone between the muscle and tendon
point where epi-, peri-, and endomysium blend into a single fibrous cord
fibrous connective tissue between the periosteum and tendon
broad sheet of tissue that surrounds the muscleas a whole
32
What is the advantage of having multiple motor units in a skeletal muscle?
allows muscles to communicate w/ each other to coordinate a specific motion
brain to regulate the amount of force used for any movement
allows muscles 2 work as both “accelerators & brakes” to different motions
It makes muscles larger and therefore more powerful
33
After applying direct compression to a cramp, how can you apply your knowledge of muscle physio to relieve a calf cramp?
Engage the dorsiflexors in an isometriccontraction
Engage the dorsiflexors in an eccentric contraction
Immediately straighten the leg fully
Engage the plantarflexors in an isometriccontraction
34
Which of these statements is the best explanation of reciprocal inhibition?
The agonist and synergists are reciprocally inhibited during contraction
When the antagonist is contracting, the agonistis inhibited
When the agonist is signaled to contract, theantagonist is inhibited
the stabilizers must reciprocate contraction of the antagonist
35
What fascial layer surrounds each skeletal muscle fiber?
Fibromysium
Perimysium
Endomysium
Epimysium
36
What does the name “flexor carpi radialis” tell you about the muscle?
Size, shape, and function of the muscle
Its strength, location, and size
Only where it is
Its function and general location
37
What is the common function of the anterior and posterior tibialis?
Inversion
Plantar flexion
Eversion
Dorsiflexion
38
Which of the adductor muscles is also a knee flexor?
Gracilis
Adductor Longus
Adductor Magnus
Pectineus
39
Which muscle attachment is generally on the bone that moves during any motion?
Proximal
Origin
Insertion
Medial
40
A sudden, spasmodic muscle contraction that is often subconsciously stimulated is called a:
Twitch contraction
Muscle spasm
Tonic episode
Tetanic contraction