Class 11 Biology - Chapter Breathing and Exchange of Gasses NCERT Solutions | What will be the pO2 and pCO2 in the atm
What will be the pO2 and pCO2 in the atmospheric air compared to those in the alveolar air?
(i) pO2 lesser, pCO2 higher
(ii) pO2 higher, pCO2 lesser
(iii) pO2 higher, pCO2 higher
(iv) pO2 lesser, pCO2 lesser
(ii) pO2 higher, pCO2 lesser
The partial pressure of oxygen in atmospheric air is higher than that of oxygen in alveolar air. In atmospheric air, pO2 is about 159 mm Hg. In alveolar air, it is about 104 mm Hg.
The partial pressure of carbon dioxide in atmospheric air is lesser than that of carbon dioxide in alveolar air. In atmospheric air, pCO2 is about 0.3 mmHg. In alveolar air, it is about 40 mm Hg.
More Questions From Class 11 Biology - Chapter Breathing and Exchange of Gasses
- Q:- What are the major transport mechanisms for CO2? Explain.
- Q:-
Define oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?
- Q:- Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system. Why?
- Q:- Define vital capacity. What is its significance?
- Q:- Explain the process of inspiration under normal conditions.
- Q:- How is respiration regulated?
- Q:-
Distinguish between
(a) IRV and ERV
(b) Inspiratory capacity and Expiratory capacity
(c) Vital capacity and Total lung capacity - Q:-
What is the effect of pCO2 on oxygen transport?
- Q:- State the volume of air remaining in the lungs after a normal breathing.
- Q:- What happens to the respiratory process in a man going up a hill?
Popular Questions of Class 11 Biology
- Q:- Why are living organisms classified?
- Q:- Discuss how classification systems have undergone several changes over a period of time?
- Q:- What is the basis of classification of algae?
- Q:- What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?
- Q:- What is meant by modification of root? What type of modification of root is found in the (a) Banyan tree (b) Turnip (c) Mangrove trees
- Q:- State the location and function of different types of meristem.
- Q:- Answer in one word or one line. (i) Give the common name of Periplaneta americana. (ii) How many spermathecae are found in earthworm? (iii) What is the position of ovaries in the cockroach? (iv) How many segments are present in the abdomen of cockroach? (v) Where do you find malphigian tubules?
- Q:-
Which of the following is not correct?
(a) Robert Brown discovered the cell.
(b) Schleiden and Schwann formulated the cell theory.
(c) Virchow explained that cells are formed from pre-existing cells.
(d) A unicellular organism carries out its life activities within a single cell. - Q:- What are macromolecules? Give examples.
- Q:- What is the average cell cycle span for a mammalian cell?
Recently Viewed Questions of Class 11 Biology
- Q:- Explain the following processes:
(a) Polarisation of the membrane of a nerve fibre
(b) Depolarisation of the membrane of a nerve fibre
(c) Conduction of a nerve impulse along a nerve fibre
(d) Transmission of a nerve impulse across a chemical synapse - Q:- Sino-atrial node is called the pacemaker of our heart. Why?
- Q:- Find examples where the four daughter cells from meiosis are equal in size and where they are found unequal in size.
- Q:- Can you attempt building models of biomolecules using commercially available atomic models (Ball and Stick models).
- Q:- Describe briefly:
(a) Arithmetic growth
(b) Geometric growth
(c) Sigmoid growth curve
(d) Absolute and relative growth rates - Q:- 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.
- Q:- Fill in the blanks:
Hormones Target gland
(a) Hypothalamic hormones __________________
(b) Thyrotrophin (TSH) __________________
(c) Corticotrophin (ACTH) __________________
(d) Gonadotrophins (LH, FSH) __________________
(e) Melanotrophin (MSH) __________________ - Q:- What are the peculiar features that you find in parasitic platyhelminthes?
- Q:- What is stomatal apparatus? Explain the structure of stomata with a labelled diagram.
- Q:- Proteins have primary structure. If you are given a method to know which amino acid is at either of the two termini (ends) of a protein, can you connect this information to purity or homogeneity of a protein?
7 Comment(s) on this Question
Very much useful for me
we breath air from atmosphere so isnt it supposed to be same?
Nice
Thanks
Good
Thanks
Very helpful
- All Chapters Of Class 11 Biology
- All Subjects Of Class 11