Cardiovascular, excretory and digestive systems

If an athlete had a heart rate of 65 bpm and a stroke volume of 80ml/beat , what is their cardiac output ?

Arteries carry blood ​ (a)   the heart. Arteries have a thick ​ (b)   as this helps the artery cope with the high pressure it withstands due to the pumping of the heart. They also have a thick ​ (c)   which is able to stretch to accommodate changes in blood pressure. Arteries run into smaller versions of the same structure - we call these vessels ​ (d)   . These connect the arteries to the ​ (e)   .

• away from
• Smooth muscle layer
• Elastic outer layer
• Arterioles
• Capillaries
• Veins
• Venules
• Back to
• Valves

What feature on the surface of red blood cells allows blood to be 'typed'

• lipid

• glycoproteins

• cholesterol

• antibody

The Vagus nerve stimulates the SA Node to speed up the heart beat - True or False

• TRUE
• FALSE

which feature of red blood cells increase area in cytoplasm for haemoglobin?

• biconcave shape

• lack of organelles

• small size and flexible

Reorder the following to describe the pathway of electrical conduction in the heart

• SA node sends impulse to atria causing them to contract

• Impulse is passed to AV node which initiates further impulses

• Impulses are passed to Bundle of His and then left and right branches

• Impulse reaches Purkinje fibres which causes ventricles to contract

Which branch of the autonomic nervous system is stimulated by the cardio-acceleratory centre

• sympathetic

• parasympathetic

Reorder the steps below to describe clotting when a blood vessel is damaged

• vasoconstriction occurs

• platelets release thromboplastin

• fibrinogen is converted to fibrin

• fibrin and platelets form a sticky web

• wound site is sealed, preventing blood loss

Where are goblet cells found in the respiratory system?

• Lungs

• Trachea

• Heart

• Liver

What is the role of ciliated epithelial cells in the trachea?

• They produce mucus to trap pathogens.

• They waft foreign material away from lungs.

• They absorb nutrients from the digested food.

• They are responsible for the secretion of digestive enzymes.