OCR a level PE
agonist correct answers creates
movement
antagonist correct answers opposed the agonist providing a resistance for
co-ordinated
moveme
nt
fixator correct answers stabilises one part of the body while another causes
movement
Isotonic muscular contraction correct answers a type of muscular
contraction
muscle where the
changes
length
concentric contraction correct answers muscle shortens
producing tension
eccentric contraction correct answers when a muscle lengthens
producing
resists tension,
gravity to control joint
movement
isometric contraction correct answers when a muscle contracts but does
not change
length, helps maintain
posture
motor neurons correct answers these are specialised cells which
transmit rapidly
impulse nerve to a group of muscle
fibres
nerve action potential correct answers the electrical charge inside the
nervewhich
cells + muscle
conducts nerve impulses down the neurone and into the
muscle fibre
phosphocreatine correct answers a high energy compound stored in the
muscle
used as cell
a fuel for very high intensity energy production (ATP-PC
system)
mitochondria correct answers a structure in the cytoplasm thats responsible
for aerobic
energy
production
myoglobin correct answers a protein in the muscle responsible for
transporting
to the oxygen
mitochondria
small motor units correct answers these units stimulate few and small
muscle
this fibres,
creates a motor unit which produces a slow and small amount of
force but can
resist
fatigue
large motor units correct answers stimulate many large muscle fibres
and creates
large a
force rapidly but fatigues
quickly
, pulmonary circuit correct answers circulation of blood through pulmonary
arteryand
lungs to the
pulmonary vein back to the
heart
systemic circuit correct answers circulation of blood through aorta to the
body back
cava and vena
to the
heart
myogenic correct answers muscle tissue that has the capacity to
generate its
electrical own that passes through muscular walls, forcing them
impulse
to contract
SA (Sino-atrial) node correct answers located in the right partial wall, it
generates
electrical impulse and forces walls to
contract
AV (atrio-ventricular) node correct answers it collects the impulse and
delays it to
seconds forallow
0.1 the atria to finish
contracting.
Bundle of His correct answers located in the septum of the heart, it splits
the
two,impulse in to be distributed through each separate
so its ready
ventricle
bundle branches correct answers it carries impulse to base of each
ventricle
purkyne fibres correct answers these distribute impulse through ventricle
walls, to
them causing
contract
cardiac dystole correct answers the relaxation phase of the
cardiac cycle
cardiac systole correct answers the contraction phase of the
cardiac cycle
diastole correct answers As the atria then ventricles relax, they expand;
drawing
into the blood
atria
The pressure in the atria increase, opening av
Blood passively enters the
valves
ventricles
SL valves close to prevent blood leaving
the heart
atrial systole correct answers the atria contract, forcing remaining blood
into ventricles
ventricular systole correct answers the ventricles contract, increase
pressure
AV valvesclosing
to prevent back flow into
atria
SL valves and forced open as blood is ejected from ventricles into the
aorta and
pulmonary
artery
AV valves correct answers bicuspid and tricuspid
valves
SL valves correct answers semilunar valves (in arteries leaving
the heart)
heart rate correct answers number of times the heart beats
per minute
agonist correct answers creates
movement
antagonist correct answers opposed the agonist providing a resistance for
co-ordinated
moveme
nt
fixator correct answers stabilises one part of the body while another causes
movement
Isotonic muscular contraction correct answers a type of muscular
contraction
muscle where the
changes
length
concentric contraction correct answers muscle shortens
producing tension
eccentric contraction correct answers when a muscle lengthens
producing
resists tension,
gravity to control joint
movement
isometric contraction correct answers when a muscle contracts but does
not change
length, helps maintain
posture
motor neurons correct answers these are specialised cells which
transmit rapidly
impulse nerve to a group of muscle
fibres
nerve action potential correct answers the electrical charge inside the
nervewhich
cells + muscle
conducts nerve impulses down the neurone and into the
muscle fibre
phosphocreatine correct answers a high energy compound stored in the
muscle
used as cell
a fuel for very high intensity energy production (ATP-PC
system)
mitochondria correct answers a structure in the cytoplasm thats responsible
for aerobic
energy
production
myoglobin correct answers a protein in the muscle responsible for
transporting
to the oxygen
mitochondria
small motor units correct answers these units stimulate few and small
muscle
this fibres,
creates a motor unit which produces a slow and small amount of
force but can
resist
fatigue
large motor units correct answers stimulate many large muscle fibres
and creates
large a
force rapidly but fatigues
quickly
, pulmonary circuit correct answers circulation of blood through pulmonary
arteryand
lungs to the
pulmonary vein back to the
heart
systemic circuit correct answers circulation of blood through aorta to the
body back
cava and vena
to the
heart
myogenic correct answers muscle tissue that has the capacity to
generate its
electrical own that passes through muscular walls, forcing them
impulse
to contract
SA (Sino-atrial) node correct answers located in the right partial wall, it
generates
electrical impulse and forces walls to
contract
AV (atrio-ventricular) node correct answers it collects the impulse and
delays it to
seconds forallow
0.1 the atria to finish
contracting.
Bundle of His correct answers located in the septum of the heart, it splits
the
two,impulse in to be distributed through each separate
so its ready
ventricle
bundle branches correct answers it carries impulse to base of each
ventricle
purkyne fibres correct answers these distribute impulse through ventricle
walls, to
them causing
contract
cardiac dystole correct answers the relaxation phase of the
cardiac cycle
cardiac systole correct answers the contraction phase of the
cardiac cycle
diastole correct answers As the atria then ventricles relax, they expand;
drawing
into the blood
atria
The pressure in the atria increase, opening av
Blood passively enters the
valves
ventricles
SL valves close to prevent blood leaving
the heart
atrial systole correct answers the atria contract, forcing remaining blood
into ventricles
ventricular systole correct answers the ventricles contract, increase
pressure
AV valvesclosing
to prevent back flow into
atria
SL valves and forced open as blood is ejected from ventricles into the
aorta and
pulmonary
artery
AV valves correct answers bicuspid and tricuspid
valves
SL valves correct answers semilunar valves (in arteries leaving
the heart)
heart rate correct answers number of times the heart beats
per minute
