BTEC Applied Science Unit 5 Questions with
correct Solutions
Function of the Right Pulmonary Artery
Carried deoxygenated blood to the right lung
Function of the Aorta
Carries oxygenated blood from the left ventricle to the rest of the body
Function of the Left Pulmonary Artery
Carries deoxygenated blood to the left lung
Function of the Left Pulmonary Vein
Carries oxygenated blood to heart from left lung
Function of Semilunar Valve
prevent backflow of blood from aorta to ventricles
Function of the Atrioventricular (Bicuspid) Valve
Prevent backflow of blood from Left Ventricle to Left Atrium
Function of the Septum
Cardiac muscle that divides the left and right side of heart
Function of Purkinje Fibres
Carry nerve impulses to ventricles to ventricles to aid contraction
Function of the Inferior Vena Cava
,Carries deoxygenated blood from the lower body to the heart
Function of the Bundles of His
transmit impulses from AV Node to ventricles
Function of Atrioventricular (Tricuspid) Valve
Prevent backflow of blood from Right Ventricle to Right Atrium
Function of Sinoatrial Node (SA Node)
The pacemaker of the heart, which is responsible for the regular contraction of the heart muscle.
Function of the Right Pulmonary Vein
Carry oxygenated blood to the heart from right lung
Function of the Superior Vena Cava
Carry deoxygenated blood from upper body to Right Atrium
Step 1 of Blood Flow(deoxygenated)
Aorta relax and fill with blood from Superior and Inferior Vena Cavae
Step 2 of Blood Flow (deoxygenated)
Atria Contract (Atrial Systole) which forces AV valves open and blood moves through to fill
ventricles
Step 3 of Blood Flow(deoxygenated)
AV Valves close shut to prevent backflow
Step 4 of Blood Flow (deoxygenated)
, Ventricles contract (Ventricular Systole) - increases pressure
Step 5 of Blood Flow (deoxygenated)
The pressure causes semilunar valves to open and blood flows into pulmonary arteries
(deoxygenated) The pressure in arteries closes the SL valves to prevent backflow.
What happens to the process of blood flow for oxygenated blood?
The process for deoxygenated is reversed.
Blood enters from Pulmonary Veins, into Left Atrium and is forced through to Left Ventricle
through the Bicuspid Valve. The ventricle contracts and forced blood through the Sl Valve into
the Aorta where it is pumped around the body.
The formulae for cardiac output?
Cardiac Output = Heart Rate X Stroke Volume
What is the Cardiac Cycle?
The process of pumping blood around the heart, once oxygenated blood is received from lung.
Step 1 of the cardiac cycle
Blood drains from Left Atrium from Pulmonary Vein. This is cardiac diastole (heart fills with
blood).
Step 2 of the cardiac cycle
The raising of blood pressure in Left Atrium forces Bicuspid Valve to open.
Step 3 of the cardiac cycle
correct Solutions
Function of the Right Pulmonary Artery
Carried deoxygenated blood to the right lung
Function of the Aorta
Carries oxygenated blood from the left ventricle to the rest of the body
Function of the Left Pulmonary Artery
Carries deoxygenated blood to the left lung
Function of the Left Pulmonary Vein
Carries oxygenated blood to heart from left lung
Function of Semilunar Valve
prevent backflow of blood from aorta to ventricles
Function of the Atrioventricular (Bicuspid) Valve
Prevent backflow of blood from Left Ventricle to Left Atrium
Function of the Septum
Cardiac muscle that divides the left and right side of heart
Function of Purkinje Fibres
Carry nerve impulses to ventricles to ventricles to aid contraction
Function of the Inferior Vena Cava
,Carries deoxygenated blood from the lower body to the heart
Function of the Bundles of His
transmit impulses from AV Node to ventricles
Function of Atrioventricular (Tricuspid) Valve
Prevent backflow of blood from Right Ventricle to Right Atrium
Function of Sinoatrial Node (SA Node)
The pacemaker of the heart, which is responsible for the regular contraction of the heart muscle.
Function of the Right Pulmonary Vein
Carry oxygenated blood to the heart from right lung
Function of the Superior Vena Cava
Carry deoxygenated blood from upper body to Right Atrium
Step 1 of Blood Flow(deoxygenated)
Aorta relax and fill with blood from Superior and Inferior Vena Cavae
Step 2 of Blood Flow (deoxygenated)
Atria Contract (Atrial Systole) which forces AV valves open and blood moves through to fill
ventricles
Step 3 of Blood Flow(deoxygenated)
AV Valves close shut to prevent backflow
Step 4 of Blood Flow (deoxygenated)
, Ventricles contract (Ventricular Systole) - increases pressure
Step 5 of Blood Flow (deoxygenated)
The pressure causes semilunar valves to open and blood flows into pulmonary arteries
(deoxygenated) The pressure in arteries closes the SL valves to prevent backflow.
What happens to the process of blood flow for oxygenated blood?
The process for deoxygenated is reversed.
Blood enters from Pulmonary Veins, into Left Atrium and is forced through to Left Ventricle
through the Bicuspid Valve. The ventricle contracts and forced blood through the Sl Valve into
the Aorta where it is pumped around the body.
The formulae for cardiac output?
Cardiac Output = Heart Rate X Stroke Volume
What is the Cardiac Cycle?
The process of pumping blood around the heart, once oxygenated blood is received from lung.
Step 1 of the cardiac cycle
Blood drains from Left Atrium from Pulmonary Vein. This is cardiac diastole (heart fills with
blood).
Step 2 of the cardiac cycle
The raising of blood pressure in Left Atrium forces Bicuspid Valve to open.
Step 3 of the cardiac cycle
