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Question 21 Mark
Name the following:
The phase of the cardiac cycle in which the ventricles get filled with blood from the atrium.
Answer
Atrial systole
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Question 31 Mark
Name the following:
The valve present in between the chambers on the right side of the human heart.
Answer
Tricuspid valve
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Question 51 Mark
Name the following:
The blood vessels which start from capillaries and end in capillaries.
Answer
Portal vein
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Question 71 Mark
Name the following:
The kind of blood cells which can squeeze out through the walls of one category of blood
vessels.
Answer
White blood cells
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Question 101 Mark
Name the following:
Any one vein which starts from an organ and ends in another organ besides the heart.
Answer
Hepatic portal vein
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Question 121 Mark
Name the following:
The cells which transport oxygen to the different parts of the human body.
Answer
Red Blood Cells
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Question 131 Mark
Study the following diagram carefully and then answer the question that follow :
Name the process occurring in B and C and state the importance of this process in the human body.
Answer
The process which occurs in B and C is phagocytosis. In this process, the WBCs engulf the foreign particles and destroy them, thus preventing the occurrence of disease.
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Question 141 Mark
Study the following diagram carefully and then answer the question that follow:
Identify the phenomenon occurring in A.
Answer
Diapedesis
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Question 151 Mark
Study the following diagram carefully and then answer the question that follow:
Name the cell labelled 1.
Answer
1 - Red blood cell
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Question 161 Mark
>he diagram given below represents the human heart in one phase of its activity. Study the same and then answer the question that follow:
How many valves are closed in this phase?
Answer
Two i.e., bicuspid and tricuspid valves are closed in this phase.
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Question 171 Mark
The diagram given alongside represents the human heart in one phase of its activity. Study the same and then answer the question that follow:

Name the phase.
Answer
Atrial Diastole and Ventricular Systole
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Question 181 Mark
The following simplified diagram refers to the outline plan of the circulation of blood in a mammal. Study the diagram and write the number and name of the blood vessel in each case as mentioned ahead.

Which vessel would contain the highest concentration of amino acids and glucose soon after a meal?
Answer
Hepatic portal vein (4)
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Question 191 Mark
The following simplified diagram refers to the outline plan of the circulation of blood in a mammal. Study the diagram and write the number and the name of the blood vessel in each case as mentioned ahead.

Several hours after a meal containing a lot of protein, which vessel will contain the highest concentration of urea?
Answer
Hepatic portal vein (4)
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Question 201 Mark
The diagram below shows part of the capillary bed in an organ of the human body. Some of the blood arriving at the capillaries at points labeled A, moves out into the spaces between the tissue cells. Study the diagram and answer the questions that follow:

Some of the liquid surrounding the cells does not pass directly back into the blood but eventually reaches it by another route through vessel X. name the fluid present in vessel X.
Answer
Lymph
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Question 211 Mark
The diagram below shows part of the capillary bed in an organ of the human body. Some of the blood arriving at the capillaries at points labeled A, moves out into the spaces between the tissue cells. Study the diagram and answer the questions that follow:

Name any one important component of the blood which remains inside the capillaries and fails to move out into the spaces.
Answer
Red blood cells
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Question 221 Mark
The diagram below shows part of the capillary bed in an organ of the human body. Some of the
blood arriving at the capillaries at points labelled A, moves out into the spaces between the tissue
cells. Study the diagram and answer the questions that follow:

When the liquid from the blood surrounds the cells, what is it called?
Answer
Tissue Fluid
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Question 231 Mark
Given below is a diagram of a smear of human blood. Study the same and answer the question that follow:
Name a soluble protein found in "4" which helps in clotting of blood.
Answer
Fibrinogen is the soluble plasma protein that helps in blood clotting.
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Question 241 Mark
Given below is a diagram of a smear of human blood. Study the same and answer the question that follow:
What is the life span of the part labeled "1"?
Answer
The average life span of a red blood cell (RBC) is about 120 days.
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Question 251 Mark
Given below is a diagram of a smear of human blood. Study the same and answer the question that follow:
Mention two structural differences between the parts labeled 1 and 2.
Answer
The red blood cells are minute biconcave disc-like structures whereas the white blood cells are amoeboid.
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Question 261 Mark
What is the function of tonsils?
Answer
Tonsils: Tonsils are lymph glands located on the sides of the neck. They tend to localize the infection and prevent it from spreading it in the body as a whole.
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Question 291 Mark
what is Lymph nodes?
Answer
Lymph nodes- The structures from which fresh lymph channels arise which pour the
lymph into major anterior veins.
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Question 301 Mark
What is Endothelium?
Answer
Endothelium- It is the innermost layer of the muscular wall of an artery or a vein which
faces the lumen.
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Question 311 Mark
What is Diapedesis?
Answer
Diapedesis - It is the squeezing of leucocytes through the wall of capillaries into the
tissues.
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Question 321 Mark
What is Universal donor?
Answer
Universal donor - The person with blood group O is a universal donor as this type of
blood can be given to persons with any blood group i.e. O, A, B, AB.
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Question 331 Mark
Name the Following :
The compound formed when haemoglobin combines with carbon dioxide in blood.
Answer
Carbaminohaemoglobin/ $HbCO _2$
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Question 341 Mark
Explain the Term :
Papillary muscles
Answer
Papillary muscles: Papillary muscles are cone-shaped muscles in the heart ventricles that attach to the valves via chordae tendineae. They prevent valve inversion during heart contraction, ensuring proper blood flow direction. Malfunction can lead to heart failure.
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Question 351 Mark
Explain the Term :
Electrocardiogram (ECG)
Answer
Electrocardiogram (ECG): A test that records the electrical activity (report of an electrocardiograph which is produced by the heart muscles during the cardiac cycle of contraction and relaxation) over a period of time. It's used to detect heart problems and monitor heart health.
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Question 361 Mark
Explain the Term :
Pacemaker.
Answer
Pacemaker : A small device implanted in the chest to help control abnormal heart rhythms. In a biological context, it refers to the sinoatrial node of the heart that naturally sets the pace of heartbeats.
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Question 371 Mark
Explain the Term :
Pulse rate
Answer
Pulse rate : Indicates the rate at which the heart beats. Each heart beat results from the contraction (systole) and relaxation (diastole) of the heart. On an average, the systole and diastole take 0.8 seconds., which makes 75 beats per minute.
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Question 381 Mark
Explain the Term :
Phagocytosis
Answer
Phagocytosis: A cellular process where cells, usually white blood cells, engulf and digest foreign particles, bacteria, and other microorganisms. It's an essential part of the immune system.
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Question 391 Mark
Explain the Term :
Hematopoiesis
Answer
Hematopoiesis: Formation of new blood corpuscles like WBC, RBC and platelats is called hematopoiesis. Bone marrow and lymph nodes are called haemopoietic tissues.
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Question 401 Mark
Explain the Term :
Diapedesis
Answer
Diapedesis: Diapedesis is the process by which the leucocytes or white blood cells squeeze out through the walls of blood capillaries at the site of injury to fight against pathogens.
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Question 411 Mark
Name the Following :
The valve present between the chambers on the right side of the human heart.
Answer
Tricuspid valve
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Question 421 Mark
Name the Following :
Passage out of WBCs through the walls of the capillaries into the tissue.
Answer
Diapedesis
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Question 441 Mark
Name the Following :
The soluble protein present in blood plasma which is responsible for blood clotting.
Answer
Fibrinogen
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[1 Mark Question Answer] - Biology STD 10 Questions - Vidyadip