PART - 2 CH - 5 Life processes Science - PART - 2 CH - 5 Life processes

The lungs in human beings are a part of the system for

The breakdown of pyruvate to give carbon dioxide, water and energy takes place in ______.

The autotrophic mode of nutrition requires ______.

The xylem in plants are responsible for ______.

The kidneys in human beings are a part of the system of _______.

Opening and closing of stomatal pore is regulated by _________.  (Guard cells, Epidermal cells, Xylem)

During photosynthesis, _________ is evolved as by-product.(Oxygen, Carbon dioxide, Nitrogen)

The wall of the arteries are thick and _________.(Elastic, Rigid, Fragile)

The terminal end of the excretory unit opens in the _________. (Collecting duct, Ureter, Nephron)

The exchange of materials between the blood and tissue cells of the body takes place through ________.(Capillaries, Veins, Arteries)

Blood is a red coloured, non-living liquid connective tissue.

The phloem tissue transports carbohydrate, amino acids and plant hormones.

In plants, the conduction of water is in both upward and downward directions.

The pulmonary arteries carry oxygenated blood.

The body temperature is maintained by using energy in animals of classes Mammalia and Aves.

The breakdown of pyruvate to give carbon dioxide, water and energy takes place in which organelle ?

Rearrange the following organs of digestive system :
Small intestine; Oesophagus; Stomach; Rectum; Mouth; Large intestine.
Where does the process of partial digestion of Starch and proteins takes place?

What are the components of the transport system in highly organised plants?

How is the small intestine designed to absorb digested food?

What is the function of digestive enzymes?

State the organs of human respiratory system.

What would be the consequences of a deficiency of haemoglobin in our bodies?

How are the alveoli designed to maximise the exchange of gases?

What are the necessary conditions for autotrophic nutrition and what are its by - products ?

What is the role of saliva in the digestion of food?

Your neighbour is a chain-smoker. He often suffers from cough and lung infection. His relatives often tell him to leave smoking.
(1) How inhaled air is filtered in the upper part of respiratory tract ?
(2) Which is the effect of smoking on the upper part of respiratory tract?
(3) Why do you call smoking as injurious to health?

Your uncle often complains about indigestion of after having oily food. He consults a doctor and is diagnosed with stone in gall bladder. Doctor advised him to remove gall bladder surgically.
(1) What is the function of gall bladder?
(2) Which process initiates the digestion of oils?
(3) After surgery, which type of food should be given to uncle?

Your younger brother complains about pain in teeth. You often notice that he frequently eats chocolates and pastries. Even he likes to eat sweets.
(1) What do you think about the pain in teeth?
(2) Which advise will you give to your brother?
(3) What will happen if this problem is untreated?

Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.

Draw a neat labelled diagram of a nephron. Explain the process of urine formation in human being.

Describe the structure and functioning of nephrons.

Write short note on Excretion in plants

How is urine produced in human?

Explain the structure of a nephron.