Question

_ wonsel has moro resistance. A- -vasse. would al orave more reeletane. a. shorter; wider b. longer wider a shorter; naow d. longer, narrow e shorter; longer t. longer, shorter 7. A friend has showed you their cardiovascuiar test results and you realze that they have a leaky mitral valve. Which of the following is true? a. One of your friend's tests conducted was an ECG b. Blood can leak into the right atrium . Blood can leak into the left atrium d. Both a. and c. e. Both a and b. . All of the above. 8 pumps blood to common carotid artery via- trwough the a. Left ventricle; aorta; tricuspld valve b. Right ventricle; superior vena cava:; bicuspld vaive C. Right atrium; superior vena cava; bicuspid valve d. Left atrium; aorta; tricuspid valve e. Right ventricle; superior vena cava; bicuspid valve L Left verticle: acrta; bicuspid vive 9. When the left ventricular function declines leading to decreased blood pressure, which of the following is true? a. There wouild be a decreased force of contraction form the left veintricle affecting ESV. b. There would be a decreased preload affecting EDV c. There would be an increase in stroks volume d. There would be a tachychardic event e. QRS intervals on an ECG would appear closer together than what is expected t. All of the above 10. In the ER, when a patient's heart rate reaches dangerously low levels or fat lines, he/she is gven an injection of norepinephrine. Why do doctors inject the patient with this hormone? a. This hormone causes K+ channels to open to reduce depolarization b. This hormone acts on the heart to increase the rate of depolarization G. This hormone acts on the heart to decrease the rate of depolarization d. This hormone acts on the heart to shorten repolarization period e. Both a, and d t. Both b and d

Answer 1

6) answer is d) longer and narrow

Resistance increases when radius decreases,as resistance is inversely proportional to cross sectional area.

Resistance increases with increase in length due to friction offered by the vessel wall.

7)answer is d) both a and c

ECG is conducted to detect anamolies and leakage oe regurgitation will occur in left atrium from left ventricle due to incompliance of the valve

8)anwer is a)

Blood from left ventricle is pumped into aorto which branches off in carotid artery and other two, through semilunar valve which has three cusps so it is a tricupid valve.

9) answer is f) all of the above.

All these events takes place during decreased blood pressure due to decreased left ventricular function.

10) answer is f) that is both b and d.

Heart rate is increased by epinephrine mediated sympathetic activity, increase in rate of depolarization causes decrease repolarization rate.