Mcq On Cardiovascular System
The cardiovascular system is composed of blood, blood vessels, and the heart. It plays an important role in the body by providing essential nutrients and oxygen to the body’s cells and organs, while also carrying away byproducts of metabolism in the form of deoxygenated blood.
1. The SA node acts as the heart’s pacemaker due to its ability to spontaneously generate electrical impulses.
(a) Because it has a poor cholinergic innervation
(b) Because it has a rich sympathetic innervation
(c) Because of its capability of generating impulses
(d) Because it generates impulses at the highest rate.
Which of the following is true?
- (a) The Earth is flat
- (b) The Earth is round
- (c) The Earth is a cube
- (d) The Earth is an oblate spheroid
Answer: (d) The Earth is an oblate spheroid
Incorrect: This about second heart sound
It is sometimes split
(b) The closure of semilunar valves is the cause of it.
(c) indicates the commencement of diastole
(d) The second sound has a longer duration than the first sound.
Which of the following is the correct answer?
A) Option A
B) Option B
C) Option C
D) Option D
Answer: (D)
The dicrotic notch on the aortic pressure curve is caused by the closure of the aortic valve.
Aorta Contraction
(b) Closure of the Aortic Valve
(c) Rapid filling of the left ventricle
(d) Closure of the Pulmonary Valve
Which of the following is correct?
- (a) 12 + 5 = 16
- (b) 12 + 5 = 17
Answer: (b)
An increase in carotid sinus pressure results in
Reflex Hypercapnia
(b) Reflex Hyperpnea
(c) Reflex Bradycardia
(d) Reflex Tachycardia
Which of the following is the correct answer?
a) Option A b) Option B c) Option C
Answer: (c) Option C
5. Resistance to blood flow in peripheral vessels can be best described as
Pulse Pressure as it corresponds to Aortic Compliance and Stroke Volume
(b) Mean Arterial Pressure as it supplies blood to organs
(c) Diastolic Blood Pressure decreases until the mid-thoracic aorta.
Systolic pressure causes an increase in the descending aorta
Which of the following is the correct answer?
- a) wrong
- b) wrong
- c) correct
Answer: c) correct
The duration of the absolute period, when the entire heart is in diastole, is approximately 0.8 seconds.
0.2 seconds
(b) 0.1 seconds
(c) 0.4 seconds
0.7 seconds
Italicize this text.
Answer: (a) Italicize this text.
7. This distinguishes glomerular capillary pressure from other capillaries found in the body
(a) Lower Filtration Pressure
(b) Higher Filtration Pressure
(c) Both (a) and (b)
None of these
Which of the following is the correct answer?
- (a) Wrong
- (b) Correct
Answer: (b) Correct
The ventricular muscles receive impulses directly from
AV Node
(B) Bundle of His
(c) Right and Left Bundle Branches
(d) Purkinje System
Which answer is correct?
- a) This one
- b) That one
- c) Neither
- d) Both
Answer: d) Both
The similarity between pulmonary and systemic circulation is that both involve the circulation of blood.
Total Capacity
(b) Pulse Pressure
(c) Peripheral Vascular Resistance
Volume of Circulation Per Minute
Which of the following is the correct answer?
- a) Option A
- b) Option B
- c) Option C
- d) Option D
Answer: d) Option D
None of these: increases heart rate, increases blood pressure, increases respiration rate
(a) It increases the uptake of oxygen by the heart
(b) It increases the contraction force
It decreases myocardial irritability.
It increases the heart rate
Which of the following is the correct answer?
- a) Wrong
- b) Incorrect
- c) Correct
Answer: c) Correct
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