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Ch.7 Muscular System

The Muscular System

Name the 3 types of muscle? 1. Skeletal(striated) 2. Smooth(visceral) 3. Cardiac muscle
Are skeletal(striated)muscles voluntary(controlled) or involntary(uncontrolled)? Voluntary
Identify 2 examples of skeletal(striated)muscle? 1. Biceps Brachii 2. Triceps Brachii
What are the characteristics of tendons? 1. Strong 2. Tough 3. Non-elastic 4. White 5. Collagenous 6. Fibrous
Is Smooth(visceral)muscle considered voluntary or involuntary? Involuntary(Autonomic)
Where are examples of smooth muscle found? 1. GI tract 2. Uterus 3. Blood vessels 4. Urinary bladder
Is Cardiac muscle voluntary or involuntary? Involuntary
Why is cardiac muscle unique? When one cardiac muscle cell is stimulated, all the cardiac muscle cells are stimulated
True or False: Cardiac muscle cells contract separately? FALSE-Contract together
What do cardiac muscles have the unique ability to do? Receive an impulse,contract,immediately relax,and then receive another impulse
A steady or constant state of partial contraction maintained in a muscle is called? Muscle Tone
Some muscle cells in a muscle will always be contracting while other muscle cells are? At rest
Muscles that are at rest will contract while those that were contracting do what? Go into relaxation
The alternating of muscles contracting and relaxing allows us to do what for long periods of time without tiring? Maintain body posture
What do nerve impulses do to assist in maintaining our body's posture for long periods of time? Alternate between various groups of muscle cells thus allowing all muscles to have periods of rest
The 2 types of muscle contractions are? 1. Isotonic 2. Isometric
What type of muscle contractions occur when muscles become shorter and thicker and the tone(tension)remains the same? Isotonic
What type of muscle contractions occur when the muscles involved remain at a constant length and the tone(tension)against the muscle icreases? Isometric
What is the name for the more fixed attachment of a muscle that serves as a basis for the action is? Origin(Base)
The moveable attachment where the effects of muscular contraction are seen is known as? Insertion
What is the name for muscles that move a limb toward the midline of the body? Adductor muscles
How do Abductor muscles move limbs? Move limbs away from midline of the body
What is the specific action of Flexor muscles? Bend a limb at a joint(ex:Biceps)
What is the function of Extensor muscles? Extend a limb at a joint(ex:Triceps)
Identify 2 muscles which are named according to their shape? 1. Quadratus(square) 2. Trapezius(triangle)
What is an example of a muscle that is named according to their origin and insertion? Sternocleidomastoid
Sternocleidomastoid muscles are primarily used to? Move the head
Three muscles that can be named according to their location are? 1. Frontalis 2. Tibialis 3. Radialis
What do the frontalis muscles do? Raise the Eyebrows
Name 3 muscles that can be named according to their number of divisions? 1. Biceps brachii 2. Triceps brachii 3. Quadriceps
Muscles can be named according to the direction their fibers run such as? 1. Transverse 2. Oblique(slanted)
Muscles that rotate a limb are called? Rotators(pitchers)
Movement of the foot upward is known as? Dorsiflexion
Movement of the foot toward the ground is called? Plantar flexion
Turning a palm so that it faces the ground is called? Pronation
What 2 muscles cause a palm to face downward? 1. Pronator teres 2. Pronator quadratus
Turning a palm upwards is known as? Supination
Identify the muscle that causes a palm to face upward? Supinator muscle(waitress)
The muscle that draws the scalp backwards is? Occipitalis
What are the muscles involved in smiling and laughing called? Zygomaticus
The 2 muscles that close the jaw(mandible) are? 1. Masseter 2. Temporalis
The 4 muscles that move a scapula include? 1. Levator scapulae(shrug) 2. Rhomboids 3. Pectoralis minor 4. Trapezius
The muscle that flexes and adducts an arm is called? Pectoralis major
The muscle that extends, adducts, and rotates an arm medially(ex:swimming) is known as? Latissimus dorsi
The name for the muscle that abducts an arm and is a site for intramucular injections(IM)is? Deltoid
The muscle that flexes a wrist is called? Flexor carpi
The muscle that extends a wrist is? Extensor carpi
The muscles that flex the fingers or toes are called? Flexor digitora
The muscles that extend the fingers or toes are known as? Extensor digitora
The muscle that flexes a thumb is? Flexor pollicis(text messaging)
What is the muscle that extends a thumb? Extensor pollicis(hitch hike)
The adductor pollicis does what? Moves a thumb toward the midline
The name of the muscle that moves a thumb away from the midline is? Abductor pollicis
The muscle that flexes and opposes a thumb and is used when we write is? Opponens pollicis(opposition)
Name the 4 muscles that make up the abdominal wall? 1. External oblique 2. Internal oblique 3. Transverse abdominis 4. Rectus abdominis("washboard")
The 3 muscles of ventilation are? 1. Diaphragm 2. Internal intercostals 3. External intercostals
The muscles of the buttocks include? 1. Gluteus maximus(cheek) 2. Gluteus minimus 3. Gluteus medius(IM injections)
Name the 6 muscles used to flex a knee? 1. Biceps femoris 2. Semitendinosus 3. Semimembranosus 4. Popliteus 5. Gracilis 6. Sartorius
What 3 muscles make up the "hamstrings"? 1. Biceps femoris 2. Semitendinosus 3. Semimembranosus
The 4 muscles that extend a knee are? 1. Rectus femoris 2. Vastus lateralis(IM injections) 3. Vastus medialis 4. Vastus intermedius
What are the 4 muscles that make up the quadriceps femoris group? 1. Rectus femoris 2. Vastus lateralis 3. Vastus medialis 4. Vastus intermedius
What 5 muscles are used to plantar flex a foot(bring it downward)? 1. Gastrocnemius(calf) 2. Tibialis posterior 3. Soleus 4. Peroneus longus 5. Plantaris
Identify the 2 muscles which dorsiflex a foot(bring it upward)? 1. Tibialis anterior 2. Peroneus tertius
How many skeletal muscles do humans have? 650
How much weight could the skeletal muscles lift if they all worked together? 11 tons
Name the 3 intramuscular(IM)injection sites? 1. Deltoid 2. Gluteus medius 3. Vastus lateralis
Created by: Crazymommaof2



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