Shared Flashcard Set

Details

Chapter 6
Essentials of Human Anatomy and Physiology; 10th edition by Marieb
22
Anatomy
Undergraduate 1
07/02/2015

Additional Anatomy Flashcards

 


 

Cards

Term
Skeletal muscle
Definition
Attach to body's skeleton, cylindrical, multi-nucleate, largest muscle type, striated, voluntary
Term
Endomysium
Definition
Connective tissue sheath surrounding skeletal, smooth, and cardiac muscles
Term
Perimysium
Definition
Fibrous membrane that encloses sheathed skeletal muscle fibers-forms Fascicle
Term
Epimysium
Definition
Encloses entire skeletal muscle
Term
Tendons
Definition
Structures that attach skeletal muscles to bones, provide durability and conserve space
Term
Smooth muscle
Definition
Found in walls of hollow body organs, no striations, involuntary, spindle-shaped, single nucleus
Term
Cardiac muscle
Definition
Found in heart, striated, involuntary, arranged in figure 8, joined by intercalated discs
Term
Sarcolemma
Definition
Plasma membrane of skeletal muscle cells
Term
I vs. A bands
Definition
I bands are light, A bands are dark
Term
Sarcomeres
Definition
Chains of contractile units that form myofibrils
Term
Myofilaments
Definition
Form sarcomeres and produce striations in skeletal muscles
Term
Thick vs. Thin filaments
Definition
Thick-Myosin, cross bridges
Thin-Actin, anchored by Z disc, not in H zone
Term
Sarcoplasmic Reticulum
Definition
Smooth ER; releases calcium, which allows muscle to contract.
Term
Extensibility vs. Elasticity
Definition
Ex-Ability to be stretched
El-Ability to resume resting length after being stretched
Term
Motor unit
Definition
The motor neuron and the skeletal muscle cells it stimulates
Term
Neuromuscular junction
Definition
The junction between the axon terminal and the sarcolemma, where acetylcholine released
Term
Fused/Complete Tetanus
Definition
Full muscle contraction, (Tetanic contraction)
Term
Unfused/Incomplete Tetanus
Definition
When muscle contractions are not smooth/sustained
Term
Isotonic Contractions
Definition
Muscle shortens to provide movement
Term
Isometric contractions
Definition
Tension in muscle keeps increasing, but shortening does not occur (contracting without progress)
Term
Muscle tone
Definition
The state of continuous partial contractions that helps maintain muscle health
Term
Origin vs. Insertion
Definition
Origin-attached to immovable bone
Insertion-attached to movable bone, moves toward origin when contracts
Supporting users have an ad free experience!