Class 10 Transportation | Life processes Extra Questions
In this page we have Important Questions for Class 10 Life processes Extra Questions . Hope you like them and do not forget to like , social share
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a. Multiple Choice Questions
b. One Marks Questions
c. Short Answer type
d. Long answer questions
Multiple Choice Questions
The figure given below shows a schematic plan of blood circulation in humans with labels (i) to (iv). Identify the correct label with its functions?
(a) (i) Pulmonary vein - takes impure blood from body part.
(b) (ii) Pulmonary artery - takes blood from lung to heart.
(c) (iii) Aorta - takes blood from heart to body parts.
(d) (iv) Vena cava takes - blood from body parts to right auricle.
Single circulation i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by
(a) Labeo, Chameleon, Salamander
(b) Hippocampus, Exocoetus, Anabas
(c) Hyla, Rana, Draco
(d) Whale, Dolphin, Turtle
What is common between extensive network of blood vessels around walls of alveoli and in glomerulus of nephron?
(a) Thick walled arteries richly supplied with blood
(b)Thin walled veins poorly supplied with blood
(d)Thick walled capillaries poorly supplied with blood.
(d)Thin walled capillaries richly supplied with blood
Very Short answer Type
How is the continuity of water column maintained? Answer
The continuity of the water column is maintained by the adhesive and cohesive properties of water. The adhesive property of the water molecules makes them adhere to the xylem walls and its cohesive property makes the water molecules remain together and move up as a stream.
How are the minerals transported across the plants? Answer
The minerals are transported in their ionic, soluble form along with water across the plant in xylem and phloem.
In what form is the food transported along phloem? Answer: The food is transported along the phloem in the form of sucrose, a o carbohydrate.
What is translocation? Answer
The transport system of soluble substances like sugars, amino acids and hormones by the phloem is called translocation.
What are the substances translocated in the phloem? Answer
The phloem translocate the food manufactured by the leaves, the hormones and the minerals ions from the falling leaves to the other regions of the plant.
What is the path of the translocation of the food in the plant? Answer
The food is manufacture in the leaves. From the mesophyll cells of the leaves, food enters the phloem cells. They are then transported along the phloem to different parts of the plants. From the phloem, the cells draw the food as per their requirement.
How is the food translocated in the phloem? Answer
The food is translocated in the phloem along the concentration gradient. That is, the food is translocated from the region of higher concentration to a region of lower concentration in the phloem.
How the materials transported in higher animals? Answer
In higher animals, the minerals are transported by the mass flow system called the circulatory system. its involving the movement of a liquid medium through the closed tubes and opened spaces between the cells.
What is ascent of sap? Answer
The upward movement of water along with the dissolved silutes up the xylem is called ascent of sap.
What are the two factors responsible for ascent of sap? Answer
The two factors responsible for ascent of sap are root pressure and transpiration pull.
What are root hairs? What is their function? Answer Root hairs are outgrowths of the epidermal cells. They help in increasing the surface area of water absorption.
What is root pressure? Answer
The water enters the roots through the root hairs. It then travels through the root tissue to reach the root xylem. Therefore, the xylem in the root has more water than the xylem column above it and this creates a positive pressure in the xylem of the root. This is called the root pressure.
Short Answer type
What are the types of substances transported by the circulatory system? Answer
The materials transported by the circulatory system include:
What are the two types of circulatory systems in a man?. Give brief on each of them? Answer
The two types of circulatory systems are:
Blood circulatory system
What are the types of blood circulatory system?. Give brief on each of them? Answer
The two types of blood circulatory systems are:
Open circulatory systems
Close circulatory systems
What is an open circulatory system? Answer
In the open circulatory system, the exchange of materials between of the cells and the blood is done directly. The blood enters into the interstitial space (space between the tissues) and circulates in these spaces. There are few blood vessels but they are not extensive. The blood vessels are open- ended as they open into the common cavities called the haemocoel. For example: Insects.
What are the three components of circulatory system in man? Answer
The three components of the circulatory system in man are:
Blood: A fluid that carries all the material
Heart: The pumping organ
Blood vessels: Tubes through which the fluid can flow to different parts of the body.
What is blood made up of? Answer
Blood is made up of:
The liquid component called the plasma
The solid components: the formed elements that are freely present in the plasma. The solid elements include the red blood cells, white blood cells and the platelets.
Mention any two functions of plasma. Answer
The two functions of plasma are:
Maintaining osmotic pressure and viscosity of the blood
Helping in transport of substances like the hormones and enzymes.
What is the main function of the red blood cells? Answer
The main function of the red blood cells is to carry oxygen. These cells contain the pigment hemoglobin which has an affinity for oxygen
Write short notes on Erythrocytes? Answer
Erythrocytes are the red blood cells. They are biconcave discs with the edges being thicker than the center. They are enucleated and contain a pigment called the hemoglobin. The hemoglobin gives the characteristic red color. They number 5 million per cubic mm in adult males and 4.5 million per cubic mm in adult females. They are synthesized in the bone marrow of certain bones like the sternum. Each has a life span of about 120 days. After this, they are destroyed in the liver.
What are the functions of leucocytes? Answer
The functions of leucocytes are:
Phagocytosis : The neutrophils and lymphocytes can engulf foreign bodies by the process called phagocytes.
Antibody Production: The leucocytes produce antibodies that attack the foreign bodies.
Anti- allergic Properties Eosinophil, a granulocytes thought to be anti- allergic.
What is the other name for platelets and what is their function? Answer
Platelets are also called thrombocytes. They play an important role in the clotting of blood.
Long Answer Type
What are the functions of platelets? Answer
The functions of platelets are:
a. Release of thromboplastin when damaged.
Thromboplastin which initiates a series of reactions that result in the clotting of blood.
b. Retraction of clot
The clot formed by the blood is further made dense by the addition of platelets and this retracts the clot making it tighter and smaller.
c.Repair of damaged endothelium
The platelets stick to the damaged portion of the wall and prevent loss of blood.
What is pulse rate? Answer
If a finger is kept at a spot where an artery runs close to the body surface, the rhythmic is movement generated by the contraction and relaxation of the heart can be felt. It is found to be the same as the heart rate. The number of pulses per minute is called the pulse rate.
What is double circulation? Answer
The circulation in which the blood passes through heart twice during one circulation is called double circulation.
(i)Name the major arteries of systemic circulation.
(ii) Why do arteries have thick and elastic walls whereas veins have valves? Answer
(i)The major arteries of systemic circulation are:
Aorta: the main artery the leaves the heart
Coronary artery: to the heart wall
Sub- clavian artery: to the shoulder region
Carotid artery: to the neck and head region
Mesenteric artery: to the stomach and intestines
Hepatic artery: to the liver
Iliac: to the genitals and the legs
(ii)The blood emerges from the heart under high pressure and flows through arteries.
Hence, to bear this pressure the arteries have thick and elastic walls.
Veins have valves to ensure that the blood flows in one direction only
What is pulmonary circulation? Answer
The right ventricle pumps blood into the pulmonary artery that carries it to the lungs. After purification in the lungs, the blood is carried back by the pulmonary vein to the left auricle of the heart. This circulation of blood between the heart and the lungs is called pulmonary circulation.
What are the components of the lymphatic system? Answer
The components of the lymphatic system are:
The fluid lymph
The channels through which the fluid flows- smaller lymph vessels and larger lymph ducts
The enlarged cavities called the lymph glands or nodes
What is tissue fluid? How it is formed? Answer
The fluid that escapes from the blood vessels into the interstitial spaces is called the tissue fluid. The blood flows under high pressure in the arteries. These arteries branch out as arterioles and then as capillaries. The walls of these vessels are very thin. The blood under pressure comes out into the tissue spaces. The cellular components and the larger proteins are not able to come out. Thus, the blood without the cells and the proteins is called the tissue fluid.
This Class 10 Transportation | Life processes Extra Questions with answers is prepared keeping in mind the latest syllabus of CBSE . This has been designed in a way to improve the academic performance of the students. If you find mistakes , please do provide the feedback on the mail.