Biology for ( Grade 10 )

Human respiratory tract (i) External nostrils : First part of respiratory system. It opens into nasal cavity and is meant for i ...

‘voice box’. It produces voice by passage of air between vocal cords. It contains four different types of cartilages among them ...

through trachea and nostrils. DAILY PRACTIVE PROBLEMS # 7 OBJECTIVE QUESTIONS The process of respiration is concerned with (A) ...

the hemoglobin of red blood cells. (A) CO 2 (B) CO (C) O 2 (D) N 2 Volume of air inspired or expired with each normal breath is ...

the rate of breathing during vigorous exercise and why? List three differences between respiration in plants and respiration in ...

RESPIRATION 8.1 MACHANISM OF GASEOUS EXCHANGE BETWEEN TISSUES AND BLOOD : When the air enters into the lungs through nostrils, t ...

8.1 (a) Control of Respiration : Respiration is controlled by the respiratory centre situated in medulla oblongata of brain. (i) ...

a sneezing. Fermentation : the slow decomposition of organic matter into simpler substances in the presence of enzymes is known ...

occurs (ix) O2 is utilized and CO 2 and H 2 O are formed C 6 H 12 O 6 + 6O 2 6O 2 + 6H 2 O + energy CO 2 and H 2 O are used whil ...

inabsence of O 2 in presence of O 2 Aneerobic respiration Aerobic respiration C 2 H 5 OH + CO 2 + 2 ATP Kreb Cycle CO 2 +H 2 O+3 ...

(vii) It starts with acetyl Co-A which is then converted into several intermediate compounds with the release of NADPH 2 , FDH 2 ...

two lungs in 100 S. m. In the cycle of inhalation and exhalation, repeated 15 to 18 times in a minutes about 500 ml of air is b ...

roughly 40% fewer oxygen molecules per breath. In order to oxygenate the body effectively, breathing rate (even while at rest) h ...

DAILY PRACTIVE PROBLEMS # 8 OBJECTIVE QUESTIONS Breathing rate in mammals in controlled by a part of the brain called the (A) ...

(C) in anaerobic and produces carbon dioxide (D) takes place only in darkness Muscle cells engaged in vigorous activity build u ...

LONG ANSWER TYPE QUESTIONS Write the differences between photosynthesis and respiration. Explain the following in brief : (a) ...

DAILY PRACTIVE PROBLEMS # 8 Qus. 1 2 3 4 5 6 7 8 9 10 Ans. C D A B B D C A A B ...

CONTROL & CO-ORDINATION 9.1 INTRODUCTION : All the living organisms show the irritability or sensitiveness. It is the proper ...

(phytohormones) co-ordination is present. 9.2 CHEMICAL CO-ORDINATION IN PLANTS : 9.2 (a) Movements in Plans : The plants are fix ...

(i) Shor day plants (ii) Long day plants (iii) Day neutral plants 9.2 (b) Vernalization and Flowering : The term vernalization w ...