Biology

Cardiovascular and Nervous System

983 Questions

Review the human cardiovascular system through these competitive exam practice questions. Key areas include heart valves, cardiac impulse pathways, and blood pressure regulation. A solid grasp of these fundamentals is crucial for science sections.

Heart anatomy and valvesCardiac impulse conductionBlood pressure mechanicsHeartbeat regulation

Cardiovascular and Nervous System Questions

Multiple choice

The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will replace the function of

  1. purkinje system

  2. sinoatrial node

  3. atrioventricular node

  4. atrioventricular bundle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sinoatrial (SA) node acts as the natural pacemaker of the heart, initiating the electrical impulse. An artificial pacemaker is implanted to replace this function when the SA node fails.

Multiple choice

Avian heart is a __________.

  1. two - chambered

  2. four - chambered

  3. three - chambered

  4. five - chambered
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Birds (Aves) have a highly efficient circulatory system with a four-chambered heart, which completely separates oxygenated and deoxygenated blood.

Multiple choice

The pacemaker of the heart is

  1. sinoatrial (SA) node

  2. atrioventricular (AV) node

  3. purkinje fibers

  4. venae cavae
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The sinoatrial (SA) node is a section of nodal tissue that is located in the upper wall of the right atrium. The SA node is also referred to as the pacemaker of the heart.

Multiple choice

Disturbance of the heart beat is termed as

  1. angina

  2. atherosclerosis

  3. cardiac arrhythmia

  4. hypoglycemia

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cardiac arrhythmia is a term that denotes a disturbance of the heart rhythm. Cardiac arrhythmias can range in severity from entirely benign to immediately life-threatening.

Multiple choice

Which among the following is also known as heart murmurs?

  1. Mitral valve prolapse

  2. Heart rhymth disorders

  3. Rheumatic heart disease

  4. Ischemic heart disease
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cardiac arrhythmia known as heart murmurs are the irregularities in the sound that the heart makes when listened to by a doctor via the means of a stethescope. Sometimes heart murmurs are harmless. At other times, however, heart murmurs can be extremely serious .

Multiple choice

The heart in fish has _______.

  1. one chamber

  2. two chambers

  3. three chambers

  4. four chambers
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fish have a single-circuit circulatory system where blood passes through the heart once per cycle. Their heart consists of one atrium and one ventricle, making it a two-chambered organ.

Multiple choice

The membrane covering of heart is _______.

  1. pleura

  2. pericardium

  3. mylein sheath

  4. meninges
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The heart is enclosed in a double-walled sac known as the pericardium. Pleura covers the lungs, and meninges cover the brain.

Multiple choice

A human heart is

  1. myogenic

  2. neurogenic

  3. cardiogenic

  4. digenic

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A human heart is myogenic.