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6. what is serum?
- plasma which has the protein myrofibrin removed to prevent infection
- plasma which has the protein fibrogen removed to prevent clotting
- plasma which has the protein fibrogen removed to prevent infection
7. the bundle of His is ....
- conductive fibres found in the septum, that carry impulses to the atria causing them to contract simultaneously
- conductive fibres found in the septum, that carry impulses to the ventricles causing them to contract simultaneously
- conductive fibres found in the ventricles, that carry impulses to the ventricles causing them to contract simultaneously
8. cardiac muscle (myocardium) is myogenic, what does this mean?
- It can create it's own rhythm
- it can modify its genes
- it can never die
9. solute potential of the blood, is also a pressure found in the blood. what liquid does it draw into the capillaries?
- water
- aqueous glucose solution
- aqueous amino acid suspension
10. what are the 3 main functions of the blood?
- to kill cells, to protect against disease and to clot
- to transport material, to protect against disease and to clot
- to transport material, to be red and to clot
11. what does the SAN do?
- causes the ventricles to contract at the same time, by sending out a regular set of electrical impulses which result in a heartbeat
- sets rhythm of the heart beat,sends out regular waves of electrical activity, causes atrium to contract at the same time
- prevents waves of electrical activity being passed to the brain
12. at what end of the capillary is hydrostatic pressure greater at?
- the arteriole end
- the venuel end
- the end closest to the brain
13. what is the purpose of the band of fibres between the atria and ventricles?
- to prevent the spread of excitation spreading to the ventricle walls
- to prevent the spread of excitation spreading to the atria walls
- to prevent the spread of excitation spreading to the septum
14. Where is tissue fluid formed?
- as blood passes through the capillaries
- as blood passes through veins
- as blood passes through arteries
15. the heart wall is made up of what muscle?
- myocardium
- mayocardium
- yomommocardium
16. if tissue fluid doesn't return to the capillaries it causes a swelling known as an...
17. the 3 main criteria for needing a transport system are...
- level of activity,size of the animals heart, surface area to volume ratio
- level of activity, size of the animal and surface area to volume ratio
- oxygen concentration,size of the animal, the size of the animals heart
18. what causes the movement of lymph in the lymph vessels?
- contraction of skeletal muscles
- contraction of heart
- the pulse
19. lymph has the same composition as tissue fluid but has...
- more CO2 and less O2
- more CO and less O2
- more 02 and less CO2
20. what are the 3 stages of the cardiac cycle?
- diastole, atrial systole and ventricular diastole
- diastole,atrial systole and ventricular systole
- diastole,atrial diastole and ventricular systole