Neural Control and Coordination — BIOLOGY STD 11 Science — Question

Describe different types of joints in the human skeleton.

How is a key helpful in the identification and classification of an organism?

Lalit, an engineer in a mechanical field used to skip his meals and used to eat junk food in hurry. Few days back Lalit complained about the frequent chest pain to his friends. One of his friend advised him to immediately visit a doctor as this might have been related to some heart disorder. Lalit visited doctor who told him to go for an ECG (Electrocardiogram). Lalit asked the
doctor about the utility of this test.

1. What is electrocardiography?
2. What does a human electrocardiogram indicate?
3. What is the utility of an ECG?
4. What values are reflected from Lalit's behaviour?

Find and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any industry which manufactures the compounds by isolation. Find out who are the buyers.

Describe the histology of human alimentary canal.

Write differences between flagella and cilia.

What are the assumptions made during the calculation of net gain of ATP?

Schematically represent double circulation.

Give three major differences between chordates and non-chordates and draw a schematic sketch of a chordate showing those features.

Each of the following terms has some anatomical significance. What do these terms mean? Explain with the help of line diagrams.

1. Plasmadesmoses/ Plasmodesmata.
2. Middle lamella.
3. Secondary wall.