Ch. 9 A&P

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

myosin

protein found in thick filaments

actin

protein found in thin filaments

tropomyosin and troponin

regulatory proteins associated with thin filaments in muscle cells

A-band

represents length in sarcomere structure

muscle shortening

what characterizes isotonic concentration contractions in muscle activity

a sustained but wavering contraction

what characterizes unfused tetanus in muscle contraction

muscle lengthening

what defines eccentric contractions in muscle movement

a sustained and smooth maximum contraction

what describes fused tetanus

smooth rely on calmodulin for contraction

what is a distinctive feature in smooth muscles compared to skeletal

no change in muscle length

what is a primary characteristic in isometric contractions

increased force of contraction caused by multiple stimuli

what is temporal summation

stores and releases calcium ions

what is the primary function of the SR in muscle cells

promotes muscle contraction

what is the primary role of acetycholine at the neuromuscular junction

sodium ions enter leading to contraction

what occurs in the muscle cell during depolarization

depolarization surpassing threshold

what triggers muscle contraciton

unfused tetanus

what type of tetanus involves sustained but wavering contraction

isotonic concentric contraction

when lifting a weight, what type of contraction occurs

isometric contraction

which type of contraction generates tension but does not change the muscles length

H-zone

area in center of A-band where there are only THICK filaments

I-band

area only containing THIN filaments

fascicles

bundle of muscle fibers within a muscle

sarcolemma

cell membrane of muscle cell

epimysium

connective tissue surrounding the ENTIRE muscle

center of sarcomere

function of M-line

boundary of the sarcomere

function of Z-line

connective tissue surrounding muscles/structures

function of the fascia

anaerobic processes yield less ATP

how are anaerobic processes different from aerobic processes in terms of ATP generation

calcium binds to troponin exposing actin binding sites

how are muscle contraction initiated

oxidative fibers are aerobic with a greater endurance

how do oxidative fibers differ from glycolic fibers

CP donates a phosphate group to ADP to regenerate ATP

how does creatine phosphate (CP) contribute to ATP regeneration during short bursts of intense exercise

allows sodium to enter the cell

how does the binding of ACh to muscle cell recptors affect ion flow

potassium moves out of cell

how is relaxation achieved

refractory period

in which phase does the muscle become unresponsive to further stimulation

perimysium

Connective tissue surrounding bundles of muscle fibers called fascicles.

endomysium

Connective tissue surrounding individual muscle fibers.


Kaugnay na mga set ng pag-aaral

PrepU Maternity and Peds Chapter 10

View Set

Sociology: A Global Perspective test 2

View Set

sociology test chp. 10, sociology test chp. 11, sociology test chp. 12, sociology test chp. 13, sociology test chp. 14

View Set

The Princess Bride/Othello Characters

View Set

Phycology chapter 5 test study guide

View Set