Biology · General Awareness

Human Circulatory System

846 Questions

The human circulatory system explores the network of blood vessels, heart valves, and structural pathways. Test items often target blood flow sequences and specific vascular functions. Mastering these details is vital for biology preparation.

Heart valves and chambersBlood vessels and venulesArteries of the bodyBlood supply to organsCentral nervous system supply

Human Circulatory System Questions

Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

A drop of each of the following, is placed separately on four slides. Which of them will not coagulate?

  1. Blood serum

  2. Blood from pulmonary artery

  3. Whole blood from pulmonary vein

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

Blood serum is liquid minus clotting elements of pale yellow colour. It may contain certain types of WBCs, antigens, hormones etc.  It does not have fibrinogen and other clotting materials. It does not take part in blood clotting. Hence if a drop of each of following, is placed separately on four slides blood serum will not coagulate.

 So, the correct answer is "Blood Serum."

Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

................. part of the blood carries minerals, vitamins, sugar and other foods to the body's cells.

  1. Plasma

  2. Platelets

  3. Red blood corpuscles

  4. White blood corpuscles
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Blood is made up of plasma and corpuscles. Plasma is the pale coloured extracellular fluid that holds the blood cells. 55% of the body's total blood volume is plasma. It contains mostly water (up to 95% by volume), and dissolved proteins, glucose, clotting factors, electrolytes, hormones and carbon dioxide and helps in transportation. Whereas platelets, RBC and WBC do not carry minerals, other food to the body cells. Thus, option A is correct.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

The condition, varicose veins in swelling of veins, occurs due to

  1. Loss of elasticity of the muscular layer

  2. Condition of high blood pressure

  3. Condition of low blood pressure

  4. Condition of anoxia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Varicose veins are the swelling of the veins that are present under the skin. This is due to the loss of elasticity in the walls of the veins that causes them to stretch out and slows down the blood to move back to the heart. This leads to increased blood pressure and the veins underneath the skin will swell. Thus, the correct answer is option A.

Multiple choice

How does a vacuum erection device work?

  1. It creates a vacuum around the penis, drawing blood into the corpora cavernosa.

  2. It applies pressure to the base of the penis, preventing blood from flowing out.

  3. It stimulates the nerves in the penis, causing an erection.

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

A vacuum erection device works by creating a vacuum around the penis, which draws blood into the corpora cavernosa, the erectile tissue of the penis.

Multiple choice

What are the three main types of blood vessels?

  1. Arteries, veins, and capillaries.

  2. Arteries, veins, and lymph vessels.

  3. Arteries, capillaries, and lymph vessels.

  4. Veins, capillaries, and lymph vessels.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The three main types of blood vessels are arteries, veins, and capillaries. Arteries carry blood away from the heart, veins carry blood back to the heart, and capillaries are tiny blood vessels that connect arteries and veins.

Multiple choice

What is the difference between arteries and veins?

  1. Arteries carry oxygenated blood, while veins carry deoxygenated blood.

  2. Arteries have thicker walls than veins.

  3. Arteries are larger than veins.

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

Arteries carry oxygenated blood away from the heart, while veins carry deoxygenated blood back to the heart. Arteries have thicker walls than veins, and arteries are larger than veins.

Multiple choice

What is blood pressure?

  1. The force exerted by blood on the walls of blood vessels.

  2. The rate at which blood flows through blood vessels.

  3. The volume of blood in the body.

  4. The concentration of oxygen in blood.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Blood pressure is the force exerted by blood on the walls of blood vessels. It is measured in millimeters of mercury (mm Hg).

Multiple choice

What is a stroke?

  1. A blockage in a blood vessel that supplies blood to the brain.

  2. A heart muscle that dies due to lack of blood flow.

  3. A condition in which the heart beats too fast.

  4. A condition in which the heart beats too slow.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A stroke occurs when a blood vessel that supplies blood to the brain is blocked. This can cause brain cells to die due to lack of blood flow.

Multiple choice

Which of the following is NOT a type of blood vessel?

  1. Artery

  2. Vein

  3. Capillary

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

Bronchi are not a type of blood vessel, but rather a type of airway.

Multiple choice

What is the term for a condition in which a person experiences severe bleeding after a traumatic injury?

  1. Hypovolemic shock

  2. Sepsis

  3. Cardiac arrest

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

Hypovolemic shock is a condition in which a person experiences severe bleeding after a traumatic injury, leading to a decrease in blood volume and a drop in blood pressure.

Multiple choice

Which chamber of the heart receives oxygenated blood from the lungs?

  1. Right atrium

  2. Right ventricle

  3. Left atrium

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

Oxygenated blood from the lungs enters the heart through the pulmonary veins and fills the left atrium.

Multiple choice

What is the largest artery in the body?

  1. Aorta

  2. Pulmonary artery

  3. Superior vena cava

  4. Inferior vena cava
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The aorta is the largest artery in the body and carries oxygenated blood away from the heart to the rest of the body.

Multiple choice

Which type of blood vessel carries blood away from the heart?

  1. Arteries

  2. Veins

  3. Capillaries

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

Arteries carry oxygenated blood away from the heart to the rest of the body.

Multiple choice

Which surgical procedure is used to bypass a blocked coronary artery?

  1. Coronary artery bypass grafting (CABG)

  2. Percutaneous coronary intervention (PCI)

  3. Heart transplant

  4. Valve replacement surgery
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Coronary artery bypass grafting (CABG) is a surgical procedure in which a blood vessel from another part of the body is grafted to the coronary artery beyond the blockage, creating a new pathway for blood to flow to the heart.