KU BIOL 240 EXAM 3 QUESTIONS WITH CORRECT ANSWERS GRADED A+
Contractility - Answers Shortens in length-move body part
Excitability - Answers responds to a stimulus
Extensibility - Answers can be stretched; opposite muscles
Elasticity - Answers returns to original length
Functions of the Muscular system - Answers Body Movement (breathing), Posture (hold internal organs),
Heat Production, Stabilize joints, Medical (injection sites)
What are the differences between the origin and insertion of a muscle? - Answers Origin: where the
muscle starts- usually stationary
Insertion: where the muscle inserts and makes it mobile
Skeletal muscle tissue - Answers striated with peripheral multi-nuclei
Smooth muscle tissue - Answers nonstriated with single central nuclei
Cardiac muscle tissue - Answers striated with single central nuclei
Tendon - Answers Muscle to Bone
Types of tendons - Answers aponeuroses, tendon sheath, retinaculum
Aponeuroses - Answers flat-sheet like
tendon sheath - Answers modified bursa
retinaculum - Answers band around a group of tendons
Three types of associated connective tissue - Answers epimysium, perimysium, endomysium
Epimysium - Answers continuous with tendon (outermost layer)
Perimysium - Answers fascicles
Endomysium - Answers insulates individual muscle fibers (innermost layer)
Synergistic muscles - Answers cross the same joint, contract together, similar actions
antagonistic muscles - Answers opposite functions, usually opposite sides IE biceps & triceps
How are skeletal muscles named? - Answers Direction, Size, Location, Association with bones,
Origin/insertion, Shape, Action
Fascicles - Answers a bundle of skeletal muscle fibers surrounded by perimysium
, parallel fascicles - Answers parallel to long axis of muscle, contract over great space, not strong but
endurance
--IE rectus abdominis
convergent fascicles - Answers converging towards the insertion point
--IE pectorals major
pennate fascicles - Answers shaped like a feather, tendon run length of muscle, (three types)
three types of pennate fascicles - Answers unipennate: fascicles on 1 side of tendon (extensor
digitorum) bipinnate: fascicles on two sides of tendon (rectus femoris) multipennate: tendon branches
within muscle (deltoid)
Circular fascicles - Answers forming rings, surround orifice, dilate/constrict IE orbiculares oris
What do motor neurons consist of? - Answers a motor neuron & muscle fibers innervated by a single
motor neuron
How do motor neurons vary among muscles? - Answers the larger the muscle the more motor units it
has
What principle do motor neuron fibers obey? - Answers All-or None
What is the neuromuscular junction? - Answers connection between the motor neuron and the muscle
fiber
What bones are in the shoulder region? - Answers scapula, clavicle, humerus
What muscles act on the shoulder joint? - Answers deltoid, rotator cuff, teres major, latissimus dorsii,
pectorals major, coracobrachialis
what type of joint is the shoulder? - Answers ball and socket
what are the rotator cuff muscles? - Answers supraspinatus, infraspinatus, teres minor, subscapularis
Shoulder separation - Answers separation of the acromioclavicular joint.
shoulder dislocation - Answers true separation of humerus from glenoid cavity
What is the acromioclavicular ligament? - Answers ligament between the acromion process of the
scapula to the clavicle
Prime movers of the shoulder - Answers deltoid, pectoralis major, latissimus dorsi
shoulder muscles that originate in the axial skeleton - Answers pectorals major & latissimus dorsii
excluded muscles of the shoulder - Answers biceps & triceps brachii
Contractility - Answers Shortens in length-move body part
Excitability - Answers responds to a stimulus
Extensibility - Answers can be stretched; opposite muscles
Elasticity - Answers returns to original length
Functions of the Muscular system - Answers Body Movement (breathing), Posture (hold internal organs),
Heat Production, Stabilize joints, Medical (injection sites)
What are the differences between the origin and insertion of a muscle? - Answers Origin: where the
muscle starts- usually stationary
Insertion: where the muscle inserts and makes it mobile
Skeletal muscle tissue - Answers striated with peripheral multi-nuclei
Smooth muscle tissue - Answers nonstriated with single central nuclei
Cardiac muscle tissue - Answers striated with single central nuclei
Tendon - Answers Muscle to Bone
Types of tendons - Answers aponeuroses, tendon sheath, retinaculum
Aponeuroses - Answers flat-sheet like
tendon sheath - Answers modified bursa
retinaculum - Answers band around a group of tendons
Three types of associated connective tissue - Answers epimysium, perimysium, endomysium
Epimysium - Answers continuous with tendon (outermost layer)
Perimysium - Answers fascicles
Endomysium - Answers insulates individual muscle fibers (innermost layer)
Synergistic muscles - Answers cross the same joint, contract together, similar actions
antagonistic muscles - Answers opposite functions, usually opposite sides IE biceps & triceps
How are skeletal muscles named? - Answers Direction, Size, Location, Association with bones,
Origin/insertion, Shape, Action
Fascicles - Answers a bundle of skeletal muscle fibers surrounded by perimysium
, parallel fascicles - Answers parallel to long axis of muscle, contract over great space, not strong but
endurance
--IE rectus abdominis
convergent fascicles - Answers converging towards the insertion point
--IE pectorals major
pennate fascicles - Answers shaped like a feather, tendon run length of muscle, (three types)
three types of pennate fascicles - Answers unipennate: fascicles on 1 side of tendon (extensor
digitorum) bipinnate: fascicles on two sides of tendon (rectus femoris) multipennate: tendon branches
within muscle (deltoid)
Circular fascicles - Answers forming rings, surround orifice, dilate/constrict IE orbiculares oris
What do motor neurons consist of? - Answers a motor neuron & muscle fibers innervated by a single
motor neuron
How do motor neurons vary among muscles? - Answers the larger the muscle the more motor units it
has
What principle do motor neuron fibers obey? - Answers All-or None
What is the neuromuscular junction? - Answers connection between the motor neuron and the muscle
fiber
What bones are in the shoulder region? - Answers scapula, clavicle, humerus
What muscles act on the shoulder joint? - Answers deltoid, rotator cuff, teres major, latissimus dorsii,
pectorals major, coracobrachialis
what type of joint is the shoulder? - Answers ball and socket
what are the rotator cuff muscles? - Answers supraspinatus, infraspinatus, teres minor, subscapularis
Shoulder separation - Answers separation of the acromioclavicular joint.
shoulder dislocation - Answers true separation of humerus from glenoid cavity
What is the acromioclavicular ligament? - Answers ligament between the acromion process of the
scapula to the clavicle
Prime movers of the shoulder - Answers deltoid, pectoralis major, latissimus dorsi
shoulder muscles that originate in the axial skeleton - Answers pectorals major & latissimus dorsii
excluded muscles of the shoulder - Answers biceps & triceps brachii
