Structural Organisation in Animals — BIOLOGY STD 11 Science — Question

Distinguish between
i. Grey matter and White matter
ii. A stimulus and An Impulse

What is an artificial pacemaker? Explain.

List out the functions of neural tissue.

Explain the following terms in relation to Phycomycetes.

1. Myceliu.
2. Eucarpy and holocarpy.
3. Asexual reproduction.

What is the advantage of development of seed habits in seed plants?

Sumit, student of class XI when returned from school was told by his mother that his grandfather was complaining about some uneasiness. Sumit told his mother to take him to the doctor. The doctor tied a cuff around his arm and pumped air, then he slowly released the air. The handcuff was connected to a tube containing mercury. Doctor told Sumit that his grandfather is suffering from high blood pressure and put him on medication. The doctor also advised him to take precautions and rest and asked Sumit's mother to bring him for regular checkups.

1. What is meant by blood pressure?
2. What is the harmful effect of blood pressure on health?
3. Enumerate the range of normal and high blood pressure in human.
4. What values are displayed by Sumit as a good grandson?

Difference between Heartbeat and Pulse.

Briefly describe the external structure of the human heart by drawing a diagram.

"The movement of water is through transpiration pull." Discuss if this statement is 100% true. Give explanation for your answer.

Write the differences in DNA and RNA.