Term
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Definition
located in the heart
involuntary
striated |
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Term
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Definition
line hollow organs
involuntary
not striated |
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Term
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Definition
voluntary (quick to respond)
striated
contract quickly
adaptive |
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Term
| Characteristics of Muscles |
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Definition
excitable
extensible
contractile
elastic |
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Term
| Functions of Muscle System |
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Definition
Movement
Maintain posture
Stabilizes joints
Generates Heat |
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Term
| A muscles usually contains... |
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Definition
| 1 nerve, 1 artery, 2-3 veins, and a lymph vessel |
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Term
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Definition
| delicate, surrounds each fiber |
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Term
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Definition
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Term
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Definition
| surrounds the entire muscle |
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Term
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Definition
| surrounds the entire muscle fiber |
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Term
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Definition
| surrounds several muscles to work as a unit |
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Term
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Definition
| place where the muscles attaches to the less movable bone |
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Term
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Definition
| the place where the muscle attaches to the more movable bone |
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Term
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Definition
| when the epimysium attaches to the periosteum or the perichondrium |
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Term
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Definition
| connective extends beyond the muscle to form rope-like tendons that attache to the periosteum or the perichondrium |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| red pigment that stores oxygen |
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Term
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Definition
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Term
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Definition
| membrane around muscle fiber |
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Term
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Definition
dark band
contains actin and myosin |
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Term
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Definition
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Term
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Definition
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Term
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Definition
bisects the H zone
anchor proteins |
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Term
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Definition
| anchor proteins on each end of the sarcomere |
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Term
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Definition
from Z Disk to Z Disk
the functional unit of skeletal muscle cells |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
Globular
Fibrous
Tropomyosin
Troponin |
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Term
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Definition
| fiber twists around actin core, blocks myosin sites on the G actin |
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Term
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Definition
Tn inhibitory- attaches to G actin
Tn tropomyosin- attaches to tropomyosin fiber
Tn calcium- attaches to calcium ions |
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Term
| Sarcoplasmic Reticulum (SR) |
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Definition
smooth ER
stores and releases calcium |
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Term
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Definition
found at the A-I junctions
made of terminal cisternae/T tubule/terminal cisternae |
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Term
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Definition
| continuous with extracellular fluid. the cell membrane dives deep into the cell. |
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Term
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Definition
| where the nerve meets the muscle cell |
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Term
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Definition
| the space between the neuron cell membrane and the muscle cell membrane |
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Term
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Definition
| bags of chemicals in the motor nerve containing Acetylcholine (ACh) |
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Term
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Definition
area on the muscle cell membrane where the nerve is.
many ACh receptors |
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Term
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Definition
an auto immune disease where antibodies kill ACh receptors.
symptoms inclue droopy eyelids, muscle weakness, hard to talk and swallow.
progressive. |
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Term
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Definition
temporarily blocks ACh receptors
paralyzes |
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Term
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Definition
| the time between the start of an action potential and when the muscle begins shortening |
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Term
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Definition
| the time when the cell cannot be stimulated to contract again until repolarization occurs |
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Term
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Definition
| muscles contract because of lack of ATP. ATP is needed to keep calcium in calcium channels. the calcium is released and triggers a contraction. all excess ATP are used to contract muscles. starts 3-4 hours after death, ends after 48-60 hours. |
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