Chapter 8 Part 1a Flashcards
What is the contractility of muslce tissue?
It’s ability to contract
What is a unique quality of muscular tissue?
It responds by contracting
What are the four properties of muscular tissue?
electrical excitability
contractility
extensibility
elasticity
What are the functions of the muscular tissue?
body movements
stability
storing and mobilizing substances
opening and closing of ducts
generating heat
Is skeletal muscle considered voluntary?
Yes
is skeletal muscle striated or non striated and what does it attach to?
it’s striated attached to bones
what does the prefix myo stand for?
muscle
name the pink highlighted part
tendon
name the pink highlighted part
epimysium
name the pink highlighted part
fascicle
name the pink highlighted part
tissue surrounding the fascicle
perimysium
name the pink highlighted part
between individual muscle fibers
endomysium
name the pink highlighted part
muscle fiber
name the pink highlighted part
epimysium
name the pink highlighted part
perimysium
name the pink highlighted part
endomysium
name the pink highlighted part
a fascicle or the muscle fiber inside the fascicle
what is the fascicle wrapped in
perimysium
where is the endomysium located?
between muscle fibers
what are muscle fibers also referred to as?
muscle cells
what are muscle fibers also known as?
myofiber
what does the prefix sarco stand for?
muscle cell
what is the cell membrane of a muscle cell called?
sarcolemma
what is the fluid inside a muscle cell called?
sarcoplasm
what do we find inside a muscle cell?
myofibril
mitochondria
nuclei
name the pink highlighted part
sarcolemma
name the pink highlighted part
mitochondria
name the pink highlighted part
myofibril
name the pink highlighted part
nucleus
what is this structure
muscle fiber (muscle cell)
name the pink highlighted part
nucleus
name the pink highlighted part
myofibril
name the pink highlighted part
striations
name the pink highlighted part
myofilaments
what are the two major myofilaments?
actin (thin)
myosin (thick)
name the pink highlighted region
sarcomere
name the pink highlighted region
thin filament (actin)
name the pink highlighted region
thick filament (myosin)
name the pink highlighted regio
top pink highlight
thin filament (actin)
name the pink highlighted region
top pink highlight
thick filament (myosin)
is this a thick (myosin) filament or a thin (actin) filament
thick (myosin)
what is the pink highlighted section called?
myosin head
is this a thick (myosin) filament or a thin (actin) filament
thin (actin)
how do the myocin heads interact with the actin?
myocin heads attach to and embed in the actin
what are these edges of the sarcomere called?
z discs
what are the thin and thick filaments called on the sarcomere?
myocin and actin
name the pink highlighted part of the sarcomere
titin
how does the titin work
connects thick filament to the z disc
runs through the core of thick filament
responsible for stretch and recoil of the muscle
name this structure
sarcomere
name the pink highlighted part of the sarcomere
describe it
z disc
zig zag shape material that separates one sarcomere from another
name the pink highlighted region of the sarcomere made of
thick (myosin) filaments
describe it
A band
section of sarcomere made of thick filaments and a small part of the thin filament that overlaps the thick filament
name the pink highlighted region of the sarcomere made of
thin (actin) filaments
describe it
I Band
part of sarcomere that contains the thin filaments. Z disc passes through the center of each I band
name the pink highlighted region of the sarcomere
describe it
H zone
small region down the cetner of the A band containing thick filaments only
what region of the sarcomere is in the center of the H zone?
describe it
M line
section right down the center of the H line that contains proteins that hold the thick filaments together at the center of the sarcomere
name the pink highlighted part
actin
