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Test: Blood, Heart - UPSC MCQ


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10 Questions MCQ Test Science & Technology for UPSC CSE - Test: Blood, Heart

Test: Blood, Heart for UPSC 2024 is part of Science & Technology for UPSC CSE preparation. The Test: Blood, Heart questions and answers have been prepared according to the UPSC exam syllabus.The Test: Blood, Heart MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Blood, Heart below.
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Test: Blood, Heart - Question 1

What is the primary function of erythrocytes in the blood?

Detailed Solution for Test: Blood, Heart - Question 1
Erythrocytes, also known as red blood cells, are primarily responsible for transporting oxygen from the lungs to the body's tissues. They contain a pigment called hemoglobin, which binds to oxygen in the lungs and releases it in tissues that require oxygen for metabolic processes. Therefore, the main function of erythrocytes is oxygen transport.
Test: Blood, Heart - Question 2

What is the function of thrombocytes or blood platelets in blood clotting?

Detailed Solution for Test: Blood, Heart - Question 2
Thrombocytes, also known as blood platelets, play a vital role in the initiation of blood clot formation. When there is an injury or damage to blood vessels, platelets adhere to the site and release substances that trigger the clotting cascade, leading to the formation of a blood clot. This process helps prevent excessive bleeding.
Test: Blood, Heart - Question 3

What is the primary role of leukocytes or white blood cells in the body?

Detailed Solution for Test: Blood, Heart - Question 3
Leukocytes, or white blood cells, play a crucial role in the body's immune system. They are responsible for defending the body against invading pathogens such as bacteria, viruses, and other foreign substances. White blood cells can perform phagocytosis (engulfing and digesting foreign particles) and produce antibodies to fight infections.
Test: Blood, Heart - Question 4
What is the normal range for the erythrocyte sedimentation rate (ESR)?
Detailed Solution for Test: Blood, Heart - Question 4
The erythrocyte sedimentation rate (ESR) is a measure of how quickly erythrocytes settle at the bottom of a test tube over a certain period of time. The normal ESR range is typically 4-10 mm/hr. Elevated ESR levels may indicate inflammation or other medical conditions.
Test: Blood, Heart - Question 5
Which blood vessels carry blood away from the heart to the tissues?
Detailed Solution for Test: Blood, Heart - Question 5
Arteries are blood vessels that carry oxygenated blood away from the heart to the body's tissues. They have thick, muscular walls to withstand the high pressure generated by the heart's contractions.
Test: Blood, Heart - Question 6
What is the function of plasma proteins in the blood?
Detailed Solution for Test: Blood, Heart - Question 6
Plasma proteins in the blood, including albumin and globulins, play a crucial role in maintaining osmotic pressure. They help regulate the movement of water and solutes between the blood and surrounding tissues, ensuring proper fluid balance in the body.
Test: Blood, Heart - Question 7
What is the normal systolic blood pressure in a healthy adult?
Detailed Solution for Test: Blood, Heart - Question 7
The normal systolic blood pressure in a healthy adult is typically around 120 mm Hg. Systolic pressure represents the highest pressure in the arteries when the heart contracts and pumps blood into the circulation.
Test: Blood, Heart - Question 8
Which component of blood is responsible for carrying food and oxygen to the body's cells?
Detailed Solution for Test: Blood, Heart - Question 8
Plasma is the liquid component of blood and is responsible for carrying food (nutrients), oxygen, and other substances to the body's cells. It also transports waste products away from cells.
Test: Blood, Heart - Question 9
What is the primary function of the lymphatic system in the body?
Detailed Solution for Test: Blood, Heart - Question 9
The primary function of the lymphatic system is to fight infections and protect the body against pathogens. It does this by transporting lymph, which contains immune cells and antibodies, and by filtering and removing foreign substances and debris from the body.
Test: Blood, Heart - Question 10
What is the main function of the sino-auricular node (S-A node) in the heart?
Detailed Solution for Test: Blood, Heart - Question 10
The sino-auricular node (S-A node) is often referred to as the "natural pacemaker" of the heart. Its main function is to generate electrical impulses that regulate the heart's rhythm and initiate each heartbeat. The S-A node is responsible for coordinating the contractions of the heart's chambers, ensuring efficient blood circulation.
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