muscles Word Scramble
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Question | Answer |
muscle that has the ability to shorten with force. | Contractility |
dome-shaped muscle | Diaphragm |
contactility | the ability of sketeal muscle to shorten with force |
Excitability | the capacity of skeletal muscle to resond to a stimulus |
extensibility | the ablility to be stretched |
Elasticity | ability to recoil to their original resting length after they have been stretched |
epimysium | each skeletal musclee is surrouned by a connective tissue sheath |
flascia | another connective tissue located outside the epimysium. It surrounds and separates muscles |
Perimysium | surrounded by loose connective tissue |
fibers | fasciculi are composed of single muscle cells |
Endomysium | each fiber is surrounded by a connective tissue sheath |
myofibrils | a threadlike structure that extends from one end of the fiber to the other |
actin myofilaments | thin myofilaments |
myosin myofilaments | thick myofilaments |
sarcomeres | the sarcomere is the basic strustural and functional unity of the muscle |
resting membrane potential | the change of different across the membrane. |
action potential | the brief reversal back of the charge |
motor neurons | are nerve cells that carry action potentials to skeletal muscle fibers |
neuromuscular junction | axons enter the muscles and branch. each branxh that connects to the muscle forms |
External intercostals | elevate the ribs during inspiration |
Internal intercostals | contract during forced expiration. |
Diaphragm | accomplishes quiet breathing. Dome-shaped muscle. Aids in breathing. |
linea alba | This tendinous area of the abdominal wall |
Tendinous inscriptions | cross the rectus abdominis at three or more locations, causing the abdominal wall of a well-muscled person to appear segmented. |
Trapezius | rotates scapula |
Serratus anterior | pulls scapula anteriorly |
pectoralis major and latissimus dorsi muscles | The arm is attached to the thorax |
Pectoralis major | adducts and flexes the arm |
Latissimus dorsi | medially rotates, adducts, and powerfully extends the arm. |
Deltoid | attaches the humerus to the scapula and clavicle, and is the major abductor of the upper limb. |
Triceps brachii | extends the forearm. Occupies the posterior compartment of the arm. |
Biceps brachii | flexes the forearm. Occupies the anterior compartment of the arm. |
Brachialis | flexes forearm |
Brachioradialis | flexes and supinates the forearm. |
Retinaculum | strong band of fibrous connective tissue that covers the flexor and extensor tendons and holds them in place around the wrist so that they do not bowstring during muscle contraction. |
Flexor carpi | flexes the wrist. |
Extensor carpi | extends the wrist |
Flexor digitorum | flexes the fingers |
Extensor digitorum | extends the fingers. |
intrinsic hand muscles | 19 hand muscles |
Gluteus maximus | buttocks. Contributes most of the mass of the buttocks |
Gluteus medius | hip muscle and common injection site. |
Quadriceps femoris | extends the leg; anterior thigh muscles |
Sartorius | flexes the thigh |
Hamstring muscles | flexes the leg and extends the thigh. |
Gastrocnemius and soleus | Flex the foot and toes. |
peroneus | The lateral muscles of the leg |
intrinsic foot | 20 muscles located within the foot |
sliding filament mechanism | the sliding of actin myofilaments past myosin myofilaments during contraction |
muscle | is a contraction oj an entire muscle in response to a stimulus that causes the action potential in one or more muscle fibers |
threshold | a muscle fiber will not resond to stimulus untl that stimulus reaches a level |
all or none response | which point the muscle fiber will contract maximally |
lag phase | the time between application os a stimulus to a motor meuron and the beginning of a contraction |
contraction phase | the time of contraction |
relaxation phase | the time during which the muscle relaxes |
tetany | where the muscle remains contracted without relaxing |
recruitment | the increase in the number of motor units being activated |
APT(adenosine triphosphate) | is needed for energy for muscle contraction |
APT | is produced in the mitochondria |
APT | is short lived and unstale. it degenerates to the more stable |
APD | plus phosphate |
creatine phosphate | when at rest they cant stockpile atp but they can store another high energy molecule |
anaerobic respirartion | without oxgyn |
aerobic respiration | with oxygen |
oxygen debt | is the amount of oxgyn needed in a chemical reaction to covert lactic acid to glueclose and to replenish the depletrd |
muscle fatigue | results when atp is used during muscle contractions faster than it can be produced |
isometric | the length of the muscle does not change |
isotonic | the amount pf tension produced by the muscle is constant during contractions |
muscle tone | muscle tone refers to constant tension produce by muscles of the body for long periods of tinme |
fast twich muscle | contracts quickley and fatigue quickly, |
slow twich fibers | contract more slowly and more resistant to fatigue. |
origin | the most stationary end of the muscle |
insertion | the end of the muscle undergoing the greastest movement |
belly | the portion of the muscle between the organ and the insertion |
synergist | muscles that work together to accomplish specific movements |
antagonists | muscles thst work in oppostioon to one another |
prime mover | among a group of synergists if one muscle plays the major role in accoplishing the ddesire of movement |
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dallaswedd
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