Biology

Cardiovascular and Nervous System

981 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

Effects of drugs on the heart can be assessed by

  1. cardioversion

  2. vectorcardiography

  3. phonocardiogram

  4. impedance cardiography
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Phonocardiogram is a technique to assess the effect of drugs on heart by recording the sounds made by the heart in the cardiac cycle.

Multiple choice

Cardiotocography technique is used for

  1. recording murmurs made by the heart

  2. regulation of heartbeat

  3. recording foetal heartbeat

  4. assessing the structure of the cardiovascular system
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cardiotocography technique is used to record foetal heartbeat. This is done to assess foetal well-being.

Multiple choice

Electrocardiography is the process of recording the electrical activity of the heart by using electrodes placed on the skin. Which of the following gels is used to permit electron conduction from skin to wire and then to the electrocardiogram?

  1. Potassium chloride

  2. Cesium chloride

  3. Silver nitrate

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

To permit electron conduction from the skin to the wire and to the electrocardiogram, potassium chloride gel is used.

Multiple choice

Ejection fraction, stroke volume and cardiac output lend mathematical structure to the common medical term 'systole'. Which of the following techniques yields these crucial measurements for diagnosis of cardiovascular function?

  1. Cardiac positron emission tomography

  2. Echocardiography

  3. Vectorcardiography

  4. Cardiac ventriculography
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cardiac ventriculography yields three crucial measurements for diagnosis of cardiovascular function. They are ejection fraction, stroke volume and cardiac output. They all lend mathematical structure to the common medical term 'systole'. Cardiac ventriculography involves injecting contrast media into the heart's ventricle(s) to measure the volume of blood pumped.

Multiple choice

During anaphylactic shock the

  1. blood pressure increases

  2. blood pressure decreases

  3. blood pressure remains normal

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Anaphylactic shock is a severe allergic reaction that causes widespread vasodilation and increased capillary permeability, leading to a rapid and dangerous drop in blood pressure.

Multiple choice

QRS is related to

  1. ventricular contraction

  2. ventricular relaxation

  3. auricular contraction

  4. auricular relaxation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 QRS is related to ventricular contraction.

Multiple choice

The heart keeps on beating throughout life without fatigue because

  1. it contracts slowly

  2. it has a resting or recovery period

  3. it can use lactic acid as an extra source of energy

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The heart muscle (myocardium) has a long refractory period, which acts as a recovery phase, preventing the muscle from entering a state of sustained contraction (tetanus) and allowing it to rest between beats.

Multiple choice

Which of the following pairs represents one and the same thing?

  1. Atrio-ventricular node − Pacemaker

  2. Corpus luteum − Yellow body

  3. Factor X − Thromboplastin Factor

  4. Mitral valve − Tricuspid valve
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The corpus luteum is a temporary endocrine structure formed in the ovary after ovulation, often referred to as the yellow body due to its appearance.

Multiple choice

In which of the following pairs do both the terms represent one and the same thing?

  1. Plasma - Serum

  2. Atriventricular - Pace maker

  3. Leucocytes - Lymphocytes

  4. Mitral valve - Bicuspid valve
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mitral valve is also known as bicuspid valve. SA node is located in the right atrial wall below the opening of the superior vena cava and called pace maker of heart. Lymphocyte is a sub-category of leucocyte, i.e. white blood corpuscles (WBC). Plasma is the matrix of blood (i.e. blood - corpuscles after clotting (i.e. blood - corpuscles + fibrinogen). 

Multiple choice

Base of heart is formed by

  1. left atrium

  2. right atrium

  3. both atria

  4. left ventricle
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Base of heart is formed by left atrium. It is separated from the vertebral column by the esophagus and aorta.

Multiple choice

If the heart is cut out from the body of a frog,

  1. it will continue beating for a long time if it is kept moist

  2. it will continue beating for a long time if it is kept dry

  3. it will not beat at all

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If the heart is cut out from the body of a frog, it will continue beating for a long time if it is kept moist. The poikilotherm heart has a built-in pacemaker (a group of neural cells sending out regular impulses) allowing the heart to beat for hours even after the brain is no longer connected to the heart.

Multiple choice

The atrioventricular node is located on the

  1. right side of interauricular septum

  2. right side of interventricular septum

  3. middle of interauricular septum

  4. middle of interventricular septum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The atrioventricular node is located on the right side of interauricular septum.

Multiple choice

If the pacemaker is absent,

  1. only auricles will contract

  2. only ventricles will contract

  3. cardiac muscles will contract in a coordinated manner

  4. cardiac muscles will not contract in a coordinated manner
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If the pace maker is absent, cardiac muscles will contract in a coordinated manner because pace maker sets the rhythmic contractions.