Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chapter 6 - Muscles
Chapter 6 - Muscular System (Anatomy)
| Question | Answer |
|---|---|
| Muscle Cells | Muscle Fibers |
| Buttocks | Gluteus Maximus |
| Chest Muscle | Pectoral Muscle |
| Anterior thigh muscle | Quadriceps femorals |
| Posterior thigh muscle | hamstring |
| Back Muscle | latissumus |
| Contractility | the ability of skeletal muscle to shorten with force |
| Excitability | the capacity of skeletal muscle to respond to a stimulus |
| Extensibility | the ability to be stretched |
| Elasticity | ability to recoil back to the original length after being stretched |
| Produces Heat | Muscles |
| Epimysium | Surrounds the skeletal muscle |
| Fascia | Surrounds the epimysium |
| Muscle Fasciculi | bundles |
| Perimysium | Surrounds the fascicle |
| Muscle Fiber | a sing cylindrical, multi nuclei |
| Endomysium | surrounds fiber |
| Myofibrils | the cytoplasm of each fiber |
| Actin Myofilaments | thin myofilaments |
| Myosin Myofilaments | thick myofilaments |
| Sarcomeres | units formed by actin and myosin myofilaments |
| Sacromere | basic structural and functional unit |
| action potential | the brief reversal back of the charge |
| motor nuerons | nerve cells that carry action potentials to skeletal muscle fibers |
| Resting Membrane Potential | the charge difference across the membrane |
| synapse | made from each branch connecting to the muscle |
| neuromuscular junction | synapse |
| motor unit | a single motor nueron |
| presynaptic terminal | an enlarged nerve terminal |
| synaptic cleft | the space between the presynaptic terminal and muscle cell |
| postsynaptic cleft | muscle fiber |
| synaptic vesicle | in each presynaptic terminal |
| acetylcholine | secrete a neurotransmitter |
| acetylcholinesterase | enzymes that release muscles cells |
| sliding filament mechanism | the sliding of actin past myosin |
| muscle twitch | a contraction of an entire muscle |
| threshold | a muscle fiber will not respond to stimulus |
| all-or-none response | when a muscle contracts maximally |
| lag phase | the time between application of a stimulus to a motor neuron and the beginning of a contraction |
| contraction phase | the time of contration |
| relaxation phase | the time during a muscles relaxes |
| tetany | where the muscle stays contracted and doesn't relax |
| recuritment | the increase in number of motor units |
| ATP | the need for energy for muscle contraction |
| ATP is produced _______. | in the mitochondria |
| ATP is ____. | Short-lived and unstable |
| creatine phosphate | can't stockpile ATP but can store other high-energy molecules |
| anaerobic respirtaion | without oxygen |
| aerobic respiration | with oxygen |
| oxygen debt | the amount of oxygen needed in chemical reactions |
| muscle fatigue | when ATP is used during muscle contraction |
| isometric | the length of muscle does not change |
| isotonic | the amount of tension produced by the muscle |
| muscle tone | constant tension produced by muscles of the body |
| fast-twitch fiber | contract quickly and fatigue quickly |
| slow-twitch fiber | contract more slowly and more resistant to fatigue |
| oorigin | the most stationary end of the muscle |
| insertion | the end of the muscle undergoing the most movement |
| belly | between the head and insertion |
| synergists | muscles that work together to complete movement |
| antagonists | muscles that work in opposition to one another |
| prime mover | a muscle that plays a major role in movement |
| occipitalfrontalis | raises eyebrows |
| orbicularis oculi | closes the eyelids |
| orbicunlaris oris | puckers lips |
| bussinator | flattens the cheeks |
| zygomaticus | smiling muscles |
| levator labii superioris | sneering |
| depressor anguli oris | frowning |
| pairs of muscles for cheeks | pterygoids, temporalis, massester |
| changes the shape of the tongue | intrinsic tongue muscles |
| moves the tongue | extrensic tongue mucles |
| neck muscle | sternocleidomastoid |
| sternocleidomastoid | lateral neck muscle and prime mover |
| Erector spinae | a group of muscles on each side of the back |
Created by:
adamspaulding