s Flashcards
s
Name muscular functions
body movement
respiration
heat production
constrictions of organs and vessels
communication
posture
bone is a connection tissue True or False
True
skeletal muscle naming
location
size
shape
orientation
what is sarco and myo
muscle
What are muscle cells called
Fibers
what are the contractile proteins in myofibrils
actin and myosin
what are the regulatory proteins that turn contraction on and off?
Troponin and tropomyosin
parts of a muscle in order
whole muscle
Fascicles
muscle fiber
myofibrils
sarcomere
myofilaments
3 types of muscle
Skeletal
Cardiac
Smooth
wrapped in
whole muscle -> epimysium
fascicles-> perimysium
Individually wrapped->Endomysium
What do T tubules do
Invaginations (tunnels) in the sarcolemma that quickly spread impulse to all areas of muscle fiber
what does sarcoplasmic reticulum do
only job is to hold calcium
what build myofibrils
actin and myosin
Where is a binding site for calcium
troponin is a binding site for calcium
where is the heart located
the heart is located in the mediastinum
what is pericardium
a bag that holds the heart and prevents overstretching
what is inflamation of the pericardium called?
pericarditis
3 layers of heart wall
epicardium–surface
myocardium–muscle
endocardium–inside
Heart thickness
atria are thin walled, delivers blood to adjacent ventricles
ventricles are thicker and stronger, supply blood to lungs
What side pumps blood to the body?
systematic circulation: the left side pumps through oxygenated blood
pulmonary circulation
pumps deoxygenated blood to the lungs
what are the four coronary arteries
Circumflex
anterior
marginal
posterior
what are pace makers
Cardiac muscle cells are autorythmic cells which are pace makers
What is sick sinus syndrome?
abnormally functioning SA node that initiates irregular heart beat
Cardiac muscles relies on what for ATP production
Cardiac muscles relies on aerobic cellular respiration for ATP production
Blood from body enters ___
This chamber is the thickest____
This chamber contains fossa ovalis__
This chamber pumps blood to the lungs__
Blood from body enters RIGHT ATRIUM
This chamber is the thickest LEFT VENTRICLE
This chamber contains fossa ovalis RIGHT ATRIUM
This chamber pumps blood to the lungs RIGHT VENTRICLE
which veins do not drain directly into right atrium?
External Jugular
In lead ll EKG record which two action potentials overlap
Atrial repolarizatin and ventricular depolarization
what is purkinje fibers
muscle
