Tag: blood circulatory system of human

Quizzes (13) Questions (115)

Questions Related to blood circulatory system of human

Multiple choice biology blood circulatory system of human cardiac disorders cardiac regulation and disorders the blood system

Coronary heart disease is due to

  1. Weakening of heart valves

  2. Insufficient blood supply to heart muscles

  3. Streptococci bacteria

  4. Inflammation of pericardium.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Coronary heart disease occurs when the coronary arteries, which supply blood to the heart muscle, become narrowed or blocked, leading to insufficient blood supply (ischemia).

Multiple choice biology blood circulatory system of human cardiac disorders cardiac regulation and disorders the blood system

Oval depression or fossa is observed over

  1. Inter-atrial septum

  2. Interventricular septum

  3. Right auriculo-ventricular septum

  4. Left auriculoventricular septum

  5. Papillary muscles.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The fossa ovalis is a depression in the right atrium of the heart, located on the inter-atrial septum, which is the remnant of the foramen ovale from fetal circulation.

Multiple choice biology blood circulatory system of human cardiac disorders cardiac regulation and disorders the blood system

Heart pumps blood more forcefully in older persons than younger ones due to

  1. Decrease in oxygen content of blood

  2. Decrease in elasticity of arteries

  3. Fall in nutrient content of blood

  4. Increase in elasticity of arteries
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As people age, the elasticity of the arterial walls decreases (arteriosclerosis). This causes the heart to pump against higher resistance, requiring more forceful contractions.

Multiple choice biology blood circulatory system of human cardiac disorders cardiac regulation and disorders the blood system

The thickening of walls of arteries is called

  1. Aneurysm

  2. Arteriosclerosis

  3. Arthritis

  4. Both A and B
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Arteriosclerosis, thickening and hardening of the arteries, is a condition in which plaque builds up inside the arteries. Plaque is made of cholesterol, fatty substances, cellular waste products, calcium and fibrin (a clotting material in the blood). Atherosclerosis is a type of arteriosclerosis. Arteriosclerosis is a general term for the thickening and hardening of arteries.  

Multiple choice biology blood circulatory system of human cardiac disorders cardiac regulation and disorders the blood system

Persons with thrombocytopenia have a tendency to bleed from capillaries all over their bodies, their skin is covered with many small purple blotches called

  1. Petechiae

  2. Ptosis

  3. Release reaction

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

A petechia is a small (1 - 2 mm) red or purple spot on the skin, caused by a minor haemorrhage (broken capillary blood vessels). The flat round red spots formed under the skin due to bleeding are known as petechiae. They are red due to the leakage of blood from the capillaries.

So, the correct answer is option A.

Multiple choice biology blood circulatory system of human cardiac disorders cardiac regulation and disorders the blood system

Which of the following is congenital heart disease?

  1. Patent ductus arteriosus

  2. Patent foramen ovale

  3. Ventricular septal defect

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Patent ductus arteriosus (PDA) is a congenital disorder in the heart, wherein a neonate's ductus arteriosus fails to close after birth. 

Patent foramen ovale (PFO) is a hole between the left and right atria (upper chambers) of the heart. 
Ventricular septal defect is a hole in the wall, that separates the right and left ventricles of the heart. It is a most common congenital heart defect.

Multiple choice biology blood circulatory system of human cardiac disorders cardiac regulation and disorders the blood system

Which of the following binds with hemoglobin irreversibly?

  1. Carbon dioxide

  2. Carbon monoxide

  3. Ethane

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

The red blood cells contain hemoglobin and each red blood cell contains nearly 280 million hemoglobin molecules. The hemoglobin molecules transport oxygen from the lungs to the tissues and also transports CO$ _2$ from the tissues to the lungs. However, the affinity displayed by hemoglobin molecules for carbon monoxide is many times greater than oxygen. The presence of even very low levels of carbon monoxide has a profound effect on oxygen transport of the blood. Moreover, the binding of carbon monoxide to hemoglobin is irreversible.