Which substances are dissolved in human blood plasma?
A carbon dioxide, haemoglobin and glucose
B carbon dioxide, oxygen and haemoglobin
C glucose, hormones and urea
D oxygen, urea and starch
Which chamber of the heart has the thickest muscle wall?
A left atrium
B left ventricle
C right atrium
D right ventricle
The diagram shows the human heart and some of the blood vessels connected to it.
Before blood in W reaches Z it must......
A gain glucose.
B give up heat to the skin.
C pass through capillaries.
D travel to the head.
Which blood vessel has a high carbon dioxide concentration, a low oxygen concentration and a high blood pressure?
B pulmonary artery
C pulmonary vein
D renal artery
The diagram shows a section through the heart.
Which part pumps blood to the aorta?
The diagram shows a section through a blood vessel in the leg.
Which type of blood vessel is shown, and in which direction does the blood flow?
A Type of blood vessel: Artery; Direction of flow: P to Q.
B Type of blood vessel: Artery; Direction of flow: Q to P.
C Type of blood vessel: Vein; Direction of flow: P to Q.
D Type of blood vessel: Vein; Direction of flow: Q to P:.
Which statement is correct for most veins in the human body?
A They carry blood at high pressure.
B They have a pulse.
C They have valves.
D They take blood away from the heart.
The diagram shows a vertical section through a human heart.
What are X and Y?
A X = left atrium; Y = right ventricle
B X = left ventricle; Y = right atrium
C X = right atrium; Y = left ventricle
D X = right ventricle; Y = left atrium
The diagrams show some components of the blood of a mammal.
Which component causes the blood to start clotting?
The diagrams show four different stages in one heart beat.
What is the correct order for the stages after stage P?
A Q → R → S
B R → Q → S
C R → S → Q
D S → R → Q
Where does haemoglobin become oxyhaemoglobin?
What is the correct sequence for blood being pumped from the heart to the lungs?
A left atrium → left ventricle → pulmonary artery
B left atrium → left ventricle → pulmonary vein
C right atrium → right ventricle → pulmonary artery
D right atrium → right ventricle → pulmonary vein
Why is the circulatory system of mammals described as a double circulation?
A Blood flows firstly through arteries and then through veins.
B Blood flows through the heart twice on one complete circuit of the body.
C In the heart, blood flows firstly through atria and then through ventricles.
D The atria and the ventricles contract alternately.
Which substance is transported by haemoglobin?
The diagram shows human blood as seen through a light microscope.
A person’s blood is unable to clot.
Which component of the blood is not functioning properly?
In which list do all three blood vessels carry oxygenated blood?
A aorta, pulmonary artery, renal artery
B aorta, pulmonary vein, renal artery
C vena cava, pulmonary artery, renal vein
D vena cava, pulmonary vein, renal vein
In a person with a low platelet level, which process is slower than normal?
A antibody formation
B blood clotting
C oxygen transport
Which blood vessel contains valves?
C renal artery
D renal vein
When blood is flowing through a vena cava, which main blood vessel will it flow through next?
A hepatic portal vein
B hepatic vein
C pulmonary artery
D pulmonary vein
Which heart valves are open and which are closed when blood passes out of the right ventricle towards the lungs?
A bicuspid (mitral) valve closed, tricuspid valve open
B bicuspid (mitral) valve open, semi-lunar valve closed
C tricuspid valve closed, semi-lunar valve open
D tricuspid valve open, bicuspid (mitral) valve open
The diagram shows the circulatory system of a mammal.
What describes the blood in vessels X and Y?
A X: deoxygenated; Y: deoxygenated
B X: deoxygenated; Y: oxygenated
C X: oxygenated; Y: deoxygenated
D X: oxygenated; Y: oxygenated
The diagram shows a double circulatory system.
Which vessels carry oxygenated blood?
A 1 and 2
B 1 and 4
C 2 and 3
D 2 and 4
The photograph shows two blood cells, X and Y.
A cell X: carries out phagocytosis; cell Y: carries oxygen
B cell X: carries oxygen; cell Y: produces antibodies
C cell X: carries oxygen; cell Y: carries carbon dioxide
D cell X: produces antibodies; cell Y: carries oxygen
What shows the sequence of organs through which urea passes as it travels from where it is produced to where it is removed from the blood?
A kidneys → heart → lungs → heart → liver
B kidneys → heart → liver → lungs → heart
C liver → heart → lungs → heart → kidneys
D liver → lungs → heart → kidneys → heart
The graph shows the effect of several minutes of vigorous (hard) exercise on heart rate.
Which letter on the graph is at a time when the person is doing this exercise?
Which blood vessel, if it becomes blocked, could lead directly to a heart attack?
A coronary artery
D vena cava
Which diagram shows the human double circulatory system?
The centre diagram shows the heart as seen from the front.
Which section shows the heart cut through line P-Q?
What is the characteristic feature of a double circulation?
A In each circuit, blood passes from the gut to the liver before going back to the heart.
B In each circuit, blood passes from the heart to the lungs and then back to the heart before going to
other parts of the body.
C In each circuit, blood passes through atria and ventricles before going to other parts of the body.
D In each circuit, blood passes through the arteries and the capillaries before returning to the heart in veins.
Which group contains substances that are all carried in the blood?
A amino acids, carbon dioxide and cellulose
B glucose, glycogen and lactic acid
C oestrogen, oxygen and starch
D salts, testosterone and urea
How often must a blood cell in the renal artery pass through the heart before it again reaches the renal artery?
C three time
D four times
The photograph shows human blood cells as seen under a microscope at high power.
Which are red cells?
A P and Q
B Q and R
C R and S
D S and P
The diagram shows the human heart.
Which two chambers contract at the same time?
A W and X
B W and Z
C X and Z
D X and Y
Which two vessels carry blood at the highest pressure?
The diagram shows blood as seen under a microscope.
Which identifies parts P, Q, R and S of the blood?
A plasma: P, platelet: Q, white blood cell: R, red blood cell: S.
B plasma: Q, platelet: P, white blood cell: S, red blood cell: R.
C plasma: R, platelet: S, white blood cell: Q, red blood cell: P.
D plasma: S, platelet: R, white blood cell: P, red blood cell: Q.
The diagram shows part of the human circulatory system.
Which part carries oxygenated blood at low pressure?