SciBio_Topic 5_Transport in Humans_MCQ

What component of blood transports hormones like insulin and oestrogen?

• plasma
• platelets
• white blood cells
• red blood cells

Which blood vessel in the human circulatory system carries deoxygenated blood from the heart to the lungs?

• aorta
• pulmonary artery
• pulmonary vein
• vena cava

The cross section of three blood vessels are shown below.

• A
• B
• C
• D

Which component of the blood causes clotting?

• plasma
• platelets
• white blood cells
• red blood cells

What is a function of platelets?

• activating fibrinogen
• antibody formation
• oxygen transport
• phagocytosis

Some blood vessels have valves. What is the function of these valves?

• to create pulse beats in the blood
• to prevent the backflow of blood
• to push the blood forward
• to reduce the pressure of blood

Which process is not a function of a white blood cell?

• antibody formation
• blood clotting
• phagocytosis
• tissue rejection

Some functions of blood are listed. 1. antibody formation 2. clot production 3. oxygen transport 4. phagocytosis Which functions are carried out by white blood cells?

• 1 and 3
• 1 and 4
• 2 and 3
• 2 and 4

Which statement about veins is correct?

• They have thick walls with valves
• They have thick walls without valves
• They have thin walls with valves
• They have thin walls without valves

Varicose veins are swollen veins that you can see under the skin. They are caused by the blood flowing the wrong way in the veins. Varicose veins are caused by a fault in what part of the blood vessel?

• blood within the blood vessel
• layer of muscle
• valve
• vein wall