Halloween Specials Cohort 2022

Which structures are part of the walls of both capillaries and veins?

• Cells and pores

• Pores

• Elastic fibers

• Cells

The light micrograph shows two blood vessels, an artery and a vein, in transverse section.

What explains the different shapes of these blood vessels?

• Arteries do not have valves.

• There are fewer elastic fibres in the walls of veins.

• Arteries have a larger lumen-to-wall thickness ratio.

• Muscle cells are found only in the walls of veins.

The diagram shows changes in pressure in the left atrium, left ventricle and aorta during a single cardiac cycle. At what point during the cycle does the atrioventricular valve close?

• A

• B

• C

• D

A fluid sample is taken from the digestive tract of a mammal. The sample is basic (alkaline) and able to digest starch and proteins. From which part of the digestive tract was the fluid taken?

• Mouth

• Stomach

• Small intestine

• Gall bladder

Which reaction occurs in blood clotting?

• 
• 
• 
• 

What is the purpose of coronary artery?

• To supply heart muscle with oxygen and nutrients.

• To supply the myocytes with oxygen and nutrients.

• To provide a way to the aorta.

• To speed up the heart rate.

What is the name of gland which secretes lipase?

• Gall bladder

• Liver

• Pancreas

• Thyroid

The eyes and the respiratory tract are both protected against infections by:

• The secretions of proteins.

• The mucous membrane that covers them.

• The alkaline secretions.

• The secretion of lyzozymes onto their surfaces.