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Cam hotstuff collins
Anatomy
| Question | Answer |
|---|---|
| What are muscle cells made from? | Muscle Fibers |
| What is the muscle responsible for smiling? | Zygomaticus |
| What is a Sarcomere? | The basic structural and functioned unity of unity of the muscles |
| What is Contractility? | The ability of skeletal muscle to shorten with force. |
| What is excitability | The capacity of skeletal muscle to respond to a stimulus |
| What is Extensibility | The ability to be stretched |
| What is Elasticity | The ability to recoil to their original resting length after they have been stretched |
| What is the Fascia | It's another connective tissue located outside the epimysium |
| Define slow twitch | Muscles that fatigue slowly |
| Define fast twitch | Muscles that fatigue at a fast rate |
| What is tetany? | Where the muscle remains contracted without relaxing |
| What is it called when the muscle fibers contract maximally | All-or-none response |
| What is the increase in motor units being activated | Recruitment |
| What is origin? | It's is the most stationary end of the muscle |
| What is insertion? | It's the end of the muscle undergoing the greatest movement |
| What is belly? | It's the of the muscle between the origin and the insertion |
| Four major characteristics of skeletal muscles | Contractility, Excitability, Extensibility, Elasticity |
| Each skeletal muscle is surrounded by a connective tissue sheath called? | epimysium |
| A muscle is composed of? | Humerus visible bundles called muscle fasciculi |
| What is perimysium? | Loose connective tissue that surrounds muscle fasciculi |
| Fasciculi an composed of single muscle cells called? | fiburs |
| Each fiber is surrounded by a connective tissue sheath called the? | endomysium |
| The cytoplasm of each fiber is filled with? | myofibrils |
| Threadlike structure that extends from one end of the fiber to the other? | myofibrils |
| Myofibrils consist of 2 major kinds of protein fibers? | 1. Actin myofilaments 2. myosin myofilaments |
| actin myofilaments? | thin myofilaments |
| myosin myofilaments? | thick myofilaments |
| Actin and myosin filaments form highly ordered units called | sacromeres |
| sarcomere? | basic structural and functional unity of the muscle |
| change difference across the membrane is called? | resting membrane potential |
| The brief reversal back of the charge is called? | actin potential |
| motor neurons? | nerve cells that carry action potentials to skeletal muscle fibors |
| Each branch that connects to the muscle form a? | neuromuscular junction or synapse |
| motor unit? | single motor neuron and all t he skeletal muscle fibers it innurrates |
| The space between the presynaptic terminal and the muscle cell is the? | synaptic cleft postsynaptic terminal |
| raises eyebrows | occipitofrontalis |
| The enlarged nerve terminal is the? | presynaptic terminal |
| closes eyelids and causes crows feet | orbicularis oculi |
| Puckers mouth? | orbiculi oris |
| flattens cheek? trumpeters mouth | buccinator |
| responsible for smiling | zygomaticus |
| responisble for sheering? | levator labii superioris |
| responsible for frowning? | depressor anguli oris |
| chewing? | mastication |
| Tongue and swallowing muscles? | intrinsic and extrinsic tongue muscles |
| changes shape of tongue? | instrinsic tongue muscles |
| Moves the tongue | extrinsic tongue muscles |
| neck muscles? | sternocleidomastoid lactural neck muscle torticollis platysma |
| Brachialis? | primary flexor of the forearm |
| tricep brachii? biceps brachii? | extends forearm, flexes and suppinates forearm |
| Internal intercostals? | contract during force expiration |
| External intercostals? | elevate ribs during inspiration |
| Thoracic muscles? | involved in breathing |
Created by:
CameronxxCollins
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