Shared Flashcard Set

Details

Chapter 9 Lecture Study Muscles
Chapter 9 Lecture Study Muscles
10
Anatomy
Undergraduate 1
06/04/2010

Additional Anatomy Flashcards

 


 

Cards

Term
Thick Filaments
Definition
run the entire A band (Myosin)
Term
Thin Filaments
Definition
I band and partway into the A band (Actin)
Term
Actin contains:
Definition
polypeptide subunit B that bear active sites for myosin attachment
Term
Actin and Myosin found in the:
Definition
A band
Term
Slow Oxidative Fibers
Definition
Depends on Oxygen Delivery
red fibers, the smallest of the fiber types
abundant in muscles used to maintain posture
Term
Fast oxidative/glycolytic fibers
Definition
fast acting myosin ATPases and depend upon anaerobic metabolism during contraction
abundant glycogen
marathon runners
Term
Excitation Contraction
Definition
sequence of events by which transmission of an action potential along the sarcolemma leads to the sliding of myofilaments.
Term
Excitation Contraction (E-C) Coupling
Definition
AP is propagated along sarcomere to T tubules
CA2+ released from SR
immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the latent period during which the events of excitation contraction coupling is occurring.
Term
The driving force of muscle contraction
Definition
calcium ions result in movement of troponin and tropomyosin on their thin filaments and this enable the myosin molecule heads to "grab" and "swivel" their way along the thin filament.
Term
Three phases of twitch
Definition
Latent period
period of contraction
period of relaxation
Supporting users have an ad free experience!