Junior Cert Science - Biology - The Circulatory System

Which one of the following is NOT part of the human circulatory system?
1. Skull
2. Blood
3. Blood vessels
4. Heart
What is the name of the organ that pumps blood around the body?
1. Heart
2. Lung
3. Kidney
4. Blood vessel
The pale yellow liquid in blood is called
1. plasma
2. platelets
3. glucose
4. lumen
Which one of the following carries blood away from the heart only?
1. Artery
2. Vein
3. Capillary
4. Pulmonary vein
Where are red blood cells made?
1. Bone marrow.
2. Heart
3. Lungs
4. Kidneys
Which one of the following is NOT transported by blood around the body?
1. Sweat
2. Oxygen
3. Carbon dioxide
4. Hormones
Which of the following is a function of blood?
1. To maintain body temperature
2. To produce bile
3. To transport food to the stomach
4. To support the body
Which one of the following statements is NOT true for white blood cells?
1. They are smaller than red blood cells.
2. They are produced in bone marrow.
3. They have no definite shape.
4. They are capable of fighting infection.
Normal body temperature is around
1. 37 ^oC
2. 32 ^oC
3. 42 ^oC
4. 28 ^oC
Where do cells in the human body get their food from?
1. Blood
2. Oxygen
3. Carbon dioxide
4. Other cells
How much blood does the average adult have?
1. 5 litres
2. 50 cm³
3. 50 litres
4. 20 litres
Why is blood that flows from the lungs to the heart more bright red than dark red?
1. The oxygen in the blood makes it a brighter red.
2. The carbon dioxide in the blood makes it a brighter red.
3. Hormones in the blood make it a bright red.
4. The lungs add a dye to the blood as it flows through.
Which one of the following statements is correct?
1. Blood cells are transported in the plasma.
2. There are only two types of blood cell.
3. White blood cells contain haemoglobin.
4. All blood cells are produced in the kidneys.
The main function of red blood cells is to
1. carry oxygen to the body's cells.
2. clot blood.
3. fight disease.
4. carry carbon dioxide to the body's cells.
Name the component of blood shown in the dagram
1. White blood cells
2. Red blood cells
3. Platelets
4. Plasma
Which part of the heart has the thickest walls?
1. Left ventricle
2. Left atrium
3. Right atrium
4. Right ventricle
Blood plasma does NOT transport
1. alveoli
2. digested food
3. urea
4. hormones
How many blood vessels leave the heart?
1. 2
2. 1
3. 3
4. 4
Haemoglobin in red blood cells is used to
1. carry oxygen around the body.
2. remove carbon dioxide from cells in the body.
3. clot wounds
4. fight disease
The diagram shows a platelet, red and white blood cells. Identify them.
1. A = red cell, B = white cell, C= platelet
2. A = red cell, B = platelet, C= white cell
3. A = white cell, B = platelet, C= red cell
4. A = white cell, B = red cell, C= platelet
(i) Platelets are circular in shape.
(ii) Plasma carries heat around the body.
(iii) White blood cells contain haemoglobin.
(iv) Red blood cells attack harmful bacteria.
Which of the above statement(s) is/are correct?
1. (ii) only
2. (i), (ii) and (iii)
3. (ii) and (iv)
4. (iii) only
Which of the following is NOT a blood vessel?
1. Colon
2. Artery
3. Vein
4. Capillary
Which one of the following does NOT describe a vein?
1. It has thin walls with valves, and carries blood to the heart.
2. It has thick walls with valves and carries blood under pressure.
3. It has a very thin wall with valves and carries blood under pressure.
4. It has thin walls and carries oxygenated blood away from the heart.
The type of muscle surrounding the heart is known as
1. cardiac
2. antagonistic
3. skeletal
4. biceps
Name the parts of the heart labelled A and B in the diagram.
1. A = left atrium, B = septum
2. A = septum, B = right ventricle
3. A = left atrium, B = valve
4. A = right atrium, B = aorta
Which blood vessel carries oxygenated blood from the left side of the heart to the main organs of the body?
1. Aorta
2. Pulmonary artery
3. Pulmonary vein
4. Vena cava
Identify X and Y in the diagram of the heart shown.
1. X = left ventricle and Y = pulmonary artery
2. X = left atrium and Y = pulmonary artery
3. X = right ventricle and Y = pulmonary vein
4. X = left ventricle and Y = valve
In the capillary blood vessels, an exchange of gases takes place with cells. Which one of the following is the correct gas exchange?
1. Oxygen leaves the capillary to the cell, and carbon dioxide enters the capillary.
2. Carbon dioxide leaves the capillary to the cell, and oxygen enters the capillary.
3. Nitrogen leaves the capillary to the cell, and carbon dioxide enters the capillary.
4. Oxygen leaves the capillary to the cell, and nitrogen enters the capillary.
An athlete's heart rate increases during exercise to provide their muscles with more
1. oxygen
2. carbon dioxide
3. water
4. glucose
Which of the items is correctly labelled in the diagram of the heart shown?
1. Aorta
2. Pulmonary vein
3. Left atrium
4. Valve
The blood vessel that carries deoxygenated blood from the body to the right side of the heart is called the
1. vena cava
2. pulmonary vein
3. aorta
4. pulmonary artery
When oxygen-rich blood leaves the lungs for the heart, it enters the heart through the pulmonary vein into the
1. left atrium
2. left ventricle
3. right ventricle
4. right atrium
How many times does the average adult heart beat per minute while at rest?
1. 70
2. 40
3. 90
4. 120
Where would you be most UNLIKELY to find a pulse?
1. Small toe
2. Wrist
3. Neck
4. Chest
Which of the following would be least likely to reduce heart disease?
1. Watching TV for 8 hours each day
2. Exercising regularly
3. Not smoking
4. Eating a healthy diet
A pulse is caused by
1. changes in blood pressure in an artery
2. the valves in an artery opening and closing
3. red blood cells colliding with each other in the arteries
4. oxygen entering the blood in the lungs
What substance gives red blood cells their colour?
1. Haemoglobin
2. Platelets
3. Plasma
4. Glucose

Junior Cert Science - Biology - The Circulatory System

Multiple Choice Quiz