2024/25 Test Bank for Human Anatomy & Physiology, 12th Edition by Marieb & Hoehn. 978-1292421810|| Complete Guide|| Graded A+
Alles voor dit studieboek
(38)
Geschreven voor
HAN1323
HAN1323
Verkoper
Volgen
Knowledgekings
Voorbeeld van de inhoud
HAN1323 HUMAN ANATOMY III FINAL
EXAM REVIEW
Sarcolemma - muscle plasma membrane
Sarcoplasm - cytoplasm of a muscle cell
Muscle cells respond to neural, stretch, or other signals by changing their _______. -
sarcolemma electrical potential (voltage)
The electrical potential change is coupled to intracellular changes that result in ______.
- force generation (contraction)
Contractility - active shortening of muscle cell and generation of tension (force)
Extensibility - passive stretching of muscle cells
Elasticity - return of muscle cells to original resting length after being stretched
Which muscle tissue(s) has cells w/ obvious stripes called striations - skeletal, cardiac
Which muscle tissue is voluntary and which is involuntary? - voluntary-
skeletal......involuntary-cardiac,smooth
What muscle tissue contracts rapidly but tires easily? - skeletal
Cardiac muscle contracts at a rate set by the heart's ________. - pacemaker
Which muscle tissue is primarily found in the walls of hollow visceral organs? - smooth
Which muscle tissue forces food and other substances through internal body cavities? -
smooth
What are the three connective tissue sheaths? - endomysium, perimysium, epimysium
What is a fine sheath of connective tissue composed of reticular fibers surrounding each
muscle fiber? - endomysium
What is fibrous connective tissue that surrounds groups of muscle fibers called
fascicles? - perimysium
,What is an overcoat of dense regular connective tissue that surrounds the entire
muscle? - epimysium
each muscle is served by ________. - one nerve(bundle of nerve fibers), an atery, and
one or more veins
when muscles contract... - the movable bone (insertion) moves toward the immovable
bone (origin)
How does a muscle attach to a bone directly? - epimysium of the muscle is fused to the
periosteum of a bone (less common)
How does a muscle attach to a bone indirectly? - connective tissue wrappings extend
beyond the muscle as a tendon or aponeurosis that attaches to a bone (more common)
What is a single muscle cell called? - a myocyte or muscle fiber
Myocyte size - 10 to 100 micrometers in diamter and many 10s of cm long
Each mature myocyte is created by fusion of multiple precursor cells called _________.
- myoblasts
Sarcoplasm has numerous ________ and an oxygen-binding protein called _________.
- glycosomes, myoglobin
Myocytes contain the usual organelles, as well as.... - myofibrils, sarcoplasmic
reticulum, T-tubules
Densly packed rodlike contractile elements are called ________. - myofibrils
What is the smallest contractile unit of a muscle called? - a sarcomere
What is the region of a myofibril b/w two succesive Z-discs? - a sarcomere
What is a sarcomere composed of? - thick and thin myofilaments made up of contractile
proteins
How long does a thick filament of a myofilament extend? A thin filament? - thick: the
entire length of an A-band
thin:across the I band and part way into the A band
What is a coin-shaped sheet of proteins (connectins) that anchors the thin filaments and
connects myofibrils? - Z-disc
, Where do elastic filaments stretch and what are they made of? - from Z-disc through the
thick filament to the M-line.
a huge protein called titin.
What are thick filaments composed of? - 200-500 myosin protein molecules
What protein has a rod-like tail and two golbular heads? - myosin
What is the primary contractice protein in thin filaments and what is it made out of? - F-
actin
each F-actin strand is a double helical polymer of individual globular subunits called G-
actin
Each G-actin subunit contains an active site to which _______ attaches to during
contraction. - a myosin head
What is a filamentous protein bound in the grooves of the F-actin helix that blocks the
myosin binding site inrelaxed muscle? - tropmyosin
What is troponin and what does it do? - a regulatory protein complex bound to F-actin
and tropomyosin, and binds calcium ions
Sarcolplasmic reticulum is a type of ________ that mostly runs ________ and
surrounds each ________. - elaborate, smooth ER
longitudinally
myofibril
_________ of SR form perpendicular cross channgels. - paired terminal cisternae
The sarcoplasmic reticulum functions to regulate intracellular _________ levels. -
calcium
Elongated tubes of sarcolemma called ________ penetrate into the cell's interior at
each A band-I band junction - T-tubules
T tubules associate with the paired terminal cisternae to form _________. - triad
junctions
T-tubules are part of the ________. - sarcolemma
The electrical impluses from T tubules signal for _________ from the adjacent terminal
cisternae into the sarcoplasm (cytoplasm) - Ca2+
The Ca2+ released by T-tubules binds to ____ - troponin
Voordelen van het kopen van samenvattingen bij Stuvia op een rij:
Verzekerd van kwaliteit door reviews
Stuvia-klanten hebben meer dan 700.000 samenvattingen beoordeeld. Zo weet je zeker dat je de beste documenten koopt!
Snel en makkelijk kopen
Je betaalt supersnel en eenmalig met iDeal, creditcard of Stuvia-tegoed voor de samenvatting. Zonder lidmaatschap.
Focus op de essentie
Samenvattingen worden geschreven voor en door anderen. Daarom zijn de samenvattingen altijd betrouwbaar en actueel. Zo kom je snel tot de kern!
Veelgestelde vragen
Wat krijg ik als ik dit document koop?
Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.
Tevredenheidsgarantie: hoe werkt dat?
Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.
Van wie koop ik deze samenvatting?
Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper Knowledgekings. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor €9,50. Je zit daarna nergens aan vast.
