Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

Raju has recently joined the gym. The very first day, while doing exercise, he felt increased rate of respiration, heartbeat, sweating, etc. He got worried as he experienced the sudden changes in his body. He discussed it with his brother who is a biology student. His brother smiled and explained him that these are the normal activities of the organs/ organ systems that occur during exercise for the maintenance of normal physiology of the human body.

1. Name the processes that are necessary for maintaining normal physiology of the human body.
2. Define coordination and integration.
3. Explain the functions of various organs of the by body that are coordinated and integrated during exercise.
4. What values did Raju's brother possess?

Angiosperms are the most advanced among plants and show more variety than any other division of plants. Additionally, most of the useful plants for us belong to the division angiosperm. Which of the following lessons can be taken from this? What are the benefits of learning multiple skills in our life?

1. A diverse group of students is always good for academic learning.
2. If a student knows multiple skills, then he is more likely to become relevant for the society.
3. A student with better physical features is likely to be a better student.

Match the following

	Column I		Column II
a.	Cristae	i.	Flat membranous sacs in stroma.
b.	Cisternae	ii.	Infoldings in mitochondria.
c.	Thylakoids	iii.	Disc-shaped sacs in Golgi apparatus.

Discuss briefly the role of nucleolus in the cells actively involved in protein synthesis.

i. What is meant by bioassay? Name the two bioassays that are used to examine auxin activity in plants.
ii. Name the hormone that acts as an antagonist to abscisic acid. From which microorganism was it extracted initially? List two bioassays of this growth hormone.

Briefly describe the structure of the Brain.

Different types of teeth are responsible for different steps of mastication. This is similar to which of these? Why should we take good care of our teeth?

1. We need different types of tools to carry out different tasks.
2. We need different modes of transport to travel.

Write the differences in DNA and RNA.

What are muscular tissues? Describe their various types.

Explain how ATP synthase (complex V) helps in the synthesis of ATP in mitochondria with the help of a diagram.