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

Heroin affects a person' s heartbeat by

  1. speeding it up

  2. slowing it down

  3. it has no effect at all

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

Heroin is an opioid that acts as a central nervous system depressant, which typically slows down heart rate and respiration.

Multiple choice

Why is the human heart four-chambered?

  1. To protect the heart from mechanical shocks

  2. To allow the assimilation of various nutrients in blood

  3. To prevent the backflow of blood

  4. To prevent the mixing of oxygenated and deoxygenated blood
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The heart has different chambers to prevent the oxygen-rich blood from mixing with the blood containing carbon dioxide. The carbon dioxide-rich blood has to reach the lungs for the removal of carbon dioxide, and the oxygenated blood from the lungs has to be brought back to the heart. 

Multiple choice

The valve that separates the left atrium from the left ventricle is called

  1. Mitral valve

  2. Tricuspid valve

  3. Aortic valve

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

The mitral valve, also called the bicuspid valve, separates the left atrium from the left ventricle. It prevents backflow of oxygenated blood into the atrium when the ventricle contracts. The tricuspid valve is on the right side, and the aortic valve separates the left ventricle from the aorta.

Multiple choice

“Pace Maker” is related to 

  1. kidney

  2. brain

  3. heart

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

A pacemaker is a small device placed in the chest or abdomen to help control abnormal heart rhythms.

Multiple choice

A newborn is found to have a loud rasping systolic murmur at the lower left sternal edge on day 2 of birth. The pulses are normal and the baby does not look cyanosed. Which of the following defects the baby must be suffering from?

  1. Atrial septal defect (ASD)

  2. Pulmonary atresia with ventriculo-septal defect (VSD)

  3. Ventriculo-septal defect (VSD)

  4. Patent ductus arteriosus (PDA)

  5. Normal heart with physiological murmur
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The high-velocity turbulence creates a rasping noise.

Multiple choice

Pulse beat is measured in:

  1. Arteriole

  2. Capillary

  3. Vein

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

An artery is an elastic blood vessel that transports blood away from the heart. There are two main types of arteries: pulmonary arteries and systemic arteries. Pulse beat is measured in artery.

Multiple choice

Heart is surrounded by:

  1. pericardium

  2. myocardium

  3. peritoneum

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

The pericardium is the fluid filled sac that surrounds the heart and the proximal ends of the aorta, vena cava and the pulmonary artery. The pericardium has several functions. It keeps the heart contained in the chest cavity. The pericardium also prevents the heart from overexpanding when blood volume increases. Within the pericardium lies the pericardial cavity. This cavity is filled with pericardial fluid, which reduces friction between the pericardial membranes.

Multiple choice

Which one pair out of the following represents one and the same thing?

  1. Atrio-ventricular- Pacemaker node (AVN)

  2. Corpus luteum-Yellow body

  3. Factor III-Stuant thromboplartin factor

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

Corpus luteum,is a yellow hormone-secreting body in the female reproductive system. It is formed in an ovary at the site of a follicle, or sac, that has matured and released its ovum, or egg, in the process known as ovulation.