Life Processes Science - Life Processes

A sportsman, after a long break of his routine exercise, suffered muscular cramps during a heavy exercise session. This happened due to :

Generally food is broken and absorbed within the body of organisms. In which of the following organisms is it done outside the body?

The oxygen liberated during photosynthesis by green plants comes from :

Pancreatic juice contains enzymes which digest :

Which chambers of human heart contain oxygenated blood?

In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Nutrition in Amoeba takes place with the help of pseudopodia.
Reason : Different stages of nutrition in Amoeba are ingestion, digestion, absorption and egestion.

In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Larynx passes air to the pharynx.
Reason : Pharynx produces sound.

Gums and resins are the _________ products of plants.

Bowman’s capsule and tubule taken together make a _________.

Iodine turns blue-black on reacting with _________.

Bile juice is secreted by ___________.

Green plants use __________, _________ and __________ to make food.

State whether the following statements are true or false:
Some organisms store wastes in body parts.

State whether the following statements are true or false:
Fish and earthworm exchange gases during respiration in the same way.

Lion has three-chambered heart. [True/ False]

The organ which extract the nitrogenous wastes from small the blood are nephron. [True/ False]

Mention one example of chemotropism.

Give one reason why multicellular organisms require special organs for exchange of gases between their body and their environment.

State any one difference between autotrophic and heterotrophic modes of nutrition.

Where does digestion of fat take place in our body?

Why do arteries have thick and elastic walls whereas veins have valves?

What is the purpose of making urine in the human body? Name the organs that stores and releases the urine.

Write one function each of the following components of the transport system in human beings:

1. Blood vessels.
2. Blood platelets.
3. Lymph.
4. Heart.

List the steps of preparation of temporary mount of a leaf peel to observe stomata.

List two difference functions performed by pancreas in our body.

Explain the process of breakdown of glucose in a cell:

1. In the presence of oxygen.
2. In the absence of oxygen.

How are oxygen and carbon dioxide transported in human beings? How are lungs designed to maximise the area for exchange of gases?

Nervous and hormonal systems together perform the function of control and coordination in human beings. Justify this statemdent with the help of an example.

Define the term transpiration. Design an experiment to demonstrate this process.

Write three types of blood vessels. Give one important feature of each.

1. Draw the structure of a nephron and label the following on it: Glomerulus, Bowman’s capsule, Renal artery, Collecting duct.
2. What happens to glucose that enters the nephron along with filtrate?

1. Draw a sectional view of the human heart and label on it: Aorta, Pulmonary arteries, Vena cava, Left ventricle.
2. Why is double circulation of blood necessary in human beings?

1. List the three events that accur during the process of photosynthesis. Explain the role of stomata in this process.
2. Describe an experiment to show that ''sunlight is essential for photosynthesis.''

Explain the process of digestion of food in mouth, stomach and small intestine in human body.

1. Draw a diagram of excretory system in human beings and label on it: Aorta, Vena cava, Urinary bladder, Urethra.
2. List two vital functions of the kidney.

Questions are based on the two table given below. Study these tables related to blood pressure level and answer the question that follow :

TABLE- A

BLOOD PRESSURE CATEGORY	SYSTOLIC mm Hg (Upper number)	DIASTOLIC mm Hg (Lower number)
Normal	120	80
Elevated	120-129	Less than 80
High Blood Pressure (Hypertension) Stage 1	130-139	80-90
High Blood Pressure (Hypertension) Stage 2	140 or higher	90 or higher
Hypertensive crisis (consult your doctor immediately)	Higher than 180	Higher than 120

TABLE-B

Time of Measurement	Blood Pressure
	Patient-X	Patient-Y
Morning	75-115	85-125
Afternoon	79-122	80-120
Evening	82-132	75-110

(i) In the table B, at which time patent-Y have ideal normal blood pressure?
(ii) Identify the patient, which have hypertension stage-1 blood pressure ?
(iii) Which Diet is the best for high blood pressure patient?
or
(iv) What is the ideal blood pressure measurement of a human?

Read the following and answer any three questions from (i) to (iv).Heterotrophic nutrition is a mode of nutrition in which organisms obtain readymade organic food from outside sources. The organisms that depend upon outside sources for obtaining organic nutrients are called heterotrophs. Heterotrophic nutrition is of three types: saprophytic, parasitic and holozoic nutrition.

1. In which groups of organisms food material is broken outside the body and absorbed?
    
2. What is a heterotrophs?
    
3. A) Give an example of saprotroph?
   B) Write three types of Heterotrophic nutrition?
   
   OR
4. What Heterotrophic nutrition involves?

Read the following and answer any three questions from (i) to (iv).
Given are the sections of two pipes, A and B. lf you need to represent blood vessels with these, which of the pipes would correspond to the artery and which one to a vein. Identify it and answer the following questions.

1. B is best defined as the vessel of which?
    
2. In A, valves are present to check backward flow of blood flowing at?
    
3. Which of the pipes would correspond to the artery and which one to a vein?
   
   OR
4. How Blood pressure in the pulmonary artery works?

Read the following and answer any three questions from (i) to (iv).All living cells need nutrients, O, and other essential substances. Also, the waste and harmful substances need to be removed continuously for healthy functioning of cells. So, a well developed transport system is mandatory for living organisms. Complex organisms have special fluids within their bodies to transport such materials. Blood is the most commonly used body fluid by most of the higher organisms. Lymph also helps in the transport of certain substances.

1. Which activity does not exhibit phagocytic?
    
2. Amount of blood corpusles in changed in dengue fever. One of the common symptoms observed in people infected with dengue fever?
    
3. Why are WBCs called soldiers of the body?
   
   OR
4. Write the feature of lymph?

Read the following and answer any three questions from (i) to (iv).The food which is prepared by the process of photosynthesis in the leaves of a plant has to be transported to other parts like stem, roots, branches, etc. Therefore this food is transported to other parts of the plant through phloem.
i. A few drops of sap were collected by cutting across a plant stem by a suitable method.'Tile sap was tested chemically. Which test results indicate that it is phloem sap?

ii. What is the direction of movement of sugars in phloem?

iii. A girdled plant (Upto bast) may survive for some time but it will eventually die, because?

OR

4. a) Phloem sap is mainly made of?
   b) How food is transported to phloem?