Class 11 Biology - Chapter Breathing and Exchange of Gasses NCERT Solutions | What happens to the respiratory process
What happens to the respiratory process in a man going up a hill?
As altitude increases, the oxygen level in the atmosphere decreases. Therefore, as a man goes uphill, he gets less oxygen with each breath. This causes the amount of oxygen in the blood to decline. The respiratory rate increases in response to the decrease in the oxygen content of blood. Simultaneously, the rate of heart beat increases to increase the supply of oxygen to blood.
More Questions From Class 11 Biology - Chapter Breathing and Exchange of Gasses
- Q:- What are the major transport mechanisms for CO2? Explain.
- Q:- 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 - 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.
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?
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- 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:- Match the terms in column I with those in column II:
Column I Column II
(a) Compound epithelium (i) Alimentry canal
(b) Compound eye (ii) Cockroach
(c) Septal nephridia (iii) Skin
(d) Open circulatory system (iv) Mosaic vision
(e) Typhlosole (v) Earthworm
(f) Osteocytes (vi) Phallomere
(g) Genitalia (vii) Bone - Q:- Find examples where the four daughter cells from meiosis are equal in size and where they are found unequal in size.
- Q:- What would happen if HCl were not secreted in the stomach?
- Q:-
Answer briefly:
(a) Why are villi present in the intestine and not in the stomach?
(b) How does pepsinogen change into its active form?
(c) What are the basic layers of the wall of alimentary canal?
(d) How does bile help in the digestion of fats? - Q:-
Choose the correct answer among the following:
(a) Gastric juice contains
(i) pepsin, lipase and rennin
(ii) trypsin lipase and rennin
(iii) trypsin, pepsin and lipase
(iv) trypsin, pepsin and renin
(b) Succus entericus is the name given to
(i) a junction between ileum and large intestine
(ii) intestinal juice
(iii) swelling in the gut
(iv) appendix - Q:- What happens when a pressure greater than the atmospheric pressure is applied to pure water or a solution?
- Q:- Fill in the gaps:
(a) Ascending limb of Henles loop is ____________to water whereas the descending limb is___________to it.
(b) Reabsorption of water from distal parts of the tubules is facilitated by hormone____________.
(c) Dialysis fluid contains all the constituents as in plasma except ________.
(d) A healthy adult human excretes (on an average) _______ gm of urea/day. - Q:- Define the following:
(a) Exocrine gland
(b) Endocrine gland
(c) Hormone - Q:- Distinguish anaphase of mitosis from anaphase I of meiosis.
- Q:- Try to collect all the currently accepted meanings for the word species. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand and bacteria on the other hand.
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