5. When taking blood pressure, the first sound picked up by the stethoscope as b

Question

5. When taking blood pressure, the first sound picked up by the stethoscope as blood pulses through the artery is the a. mean arterial pressure b. pulse pressure c. diastolic pressure d. peak systolic pressure The two major factors affecting blood flow rates are: a. diameter and length of blood vessels pressure and resistance c. neural and hormonal control mechanisms d. turbulence and viscosity The four large blood vessels, two from each lung, that empty into the left atrium, completing the pulmonary circuit, are the 7. a. venae cavac b pulmonary arteries c. pulmonary veins d. subclavian veins The large blood vessel that collects most of the venous blood from organs below the diaphragm is the: ° 8. a. superior vena cava b. inferior vena cava c. hepatic portal vein d. superior mesenteric vein 9. The primary function(s) of the respiratory system is (are): a. to move air to and from the exchange surfaces b. to provide an area for gas exchange between air and circulating blood c. to protect respiratory surfaces from dehydration and environmental variations d. a, b, and c are correct 10. The respiratory system consists of structures that: a. provide defense from pathogenic invasions b. permit vocalizations and production of other sound c. regulate blood volume and pressure d. a, b, and c are correct

Explanation / Answer

5] Option [d] peak systolic pressure

This is the measure in the blood vessels when the heart beats and pumps blood out. The dyastolic blood pressure is the measure of pressure in the blood vessels when the heart is at rest.

6] Option [a] diameter and length of the blood vessel

Heart has to pump harder if the blood vessel is narrow and long. So, the blood pressure is higher.

7] Option [c] pulmonary veins

Veins are the blood vessels which bring blood to the heart. Pulmonary veins are the only veins which carry oxygenated blood fom the lungs to the heart.

Pulmonary arteries carry deoxygenated blood from the right ventricle to the lungs.

8] Option [b] inferior vena cava

Inferior vena cava collects deoxygenated blood from the lower part of the body and empties into the right atrium of the heart after joining the superior vena cava , which brings impure blood from the upper part of the body.

9] Option [d] a,b and c are correct

The respiratory system provides a passage for the air to reach the lungs where gaseous exchange takes place. As the air enters the nasal cavity, it is moistioned, warmed and cleaned of dust and germs by the tiny hair and mucous present on the inner wals of the nasal cavity.

10] Option [b] permit vocalisation and production of other sounds

The voice box or larynx is present as a part of the respiratory tract. Sound is produced by the vibrations of the vocal cord present in the larynx .

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