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4Why do the aorta and its first ramifications contain a high proportion of elastic fibres? 1to contract vigorously to draw blood out of the heart 2to accommodate the blood leaving the heart 3so that the pulse can be felt away from the heart 4to contract and expand with blood flow 19What is the wrong association DIGESTIVE COMPONENT / FUNCTION? 1stomach / first denaturation of proteins by its acid secretions 2pancreas / production of baking soda 3 gallbladder / production of fat emulsifying agent 4colon / synthesis of vitamins K and B12 10Concerning the respiratory system of humans and that of birds and amphibians, which statement is true? 1just like in humans, there is a mixture of fresh air and residual air in birds, which decreases respiratory efficiency in both types of animals 2the respiratory system of birds is considered to be the most sophisticated and efficient in the animal kingdom 2just like in humans, there is sweating in birds, even in the presence of feathers 3 4the ventilation of air in terrestrial animals depends on the class to which the animal belongs: if it is an amphibian it moves air by negative pressure 11Which of these roles of the cardiovascular system is not related to the maintenance of homeostasis? 1blood pumping 2regulation of body heat 3Maintaining an adequate amount of oxygen in the blood 4protection against bleeding 12In order for amino acids to be used for energy production: 1they must be converted into ketonic acids 2they must be produced from acetyl CoA 3they must be deaminated and converted into urea 4they must be subject to lactic fermentation 14What is the wrong RESPIRATORY COMPONENT / FUNCTION association? 1larynx / voice organ 2bronchi / can be either main, lobar (secondary) or segmental (tertiary) 3trachea / connects the nasal cavity to the organ of voice 4 cells / are used for gas exchange 13What is the wrong RESPIRATORY COMPONENT / FUNCTION association? 1larynx / voice organ 2bronchi / can be either main, lobar (secondary) or segmental (tertiary) 3trachea / connects the nasal cavity to the organ of voice 4 cells / are used for gas exchange 14What type of tissue prevents the trachea from collapsing during inspiration? 1the smooth muscle located between the esophagus and the trachea 2its hyaline connective tissue 3its mucus-producing submucosa 4its mucosa resting on a lamina propria 21Which of these substances are considered to need to be excreted? 1dioxygen 2 antibodies 3 hormones 4 nitrogenous substances.

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3trachea / connects the nasal cavity to the organ of voice
4 cells / are used for gas exchange
14What type of tissue prevents the trachea from collapsing during inspiration?
1the smooth muscle located between the esophagus and the trachea
2its hyaline connective tissue
3its mucus-producing submucosa
4its mucosa resting on a lamina propria
21Which of these substances are considered to need to be excreted?
1dioxygen
2 antibodies
3 hormones
4 nitrogenous substances

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