HSC Science कक्षा ११ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Why are villi present in the intestine and not in the stomach?

Bile juice contains no digestive enzymes, yet it is important for digestion. Why?

The respiratory structures of insects are ______.

List the chemical changes that starch molecule undergoes from the time it reaches the small intestine.

Name the respiratory organs of flatworm, earthworm, fish, prawn, cockroach and cat.

Which structure seals the larynx when we swallow?

Diffusion of gases occurs in the alveolar region only and not in any other part of the respiratory system. Discuss.

Sketch a flow chart to show the path way of air flow during respiration.

Name the three filtration barriers that solutes must come across as they move from plasma to the lumen of Bowman’s capsule. What components of the blood are usually excluded by these layers?

Identify the wrong match

Podocytes are the cells present on the ______.

Malpighian tubules remove excretory products from ______.

Identify the biological term

Removal of unwanted substances from the body.

Differentiate protonephridia from metanephridia.

Differentiate cortical from medullary nephrons.

Muscles are derived from  ______.

Muscles are formed by ______.

Examine the diagram of the two cell types A and B given below and select the correct option.

The respiratory centre is present in the ______.

The abundant intracellular cation is ______.