Chapter 22: Chemical Coordination and Integration
NCERT TEXTBOOK QUESTIONS FROM SOLVED 1. Define the following:(a) Exocrine gland,(b) Endocrine gland,(c) Hormone.Solution:(a) Exocrine gland is a gland that pours its secretion on the surface or into a particular region by means of ducts for performing…
Chapter 21: Neural Control and Coordination
NCERT TEXTBOOK QUESTIONS FROM SOLVED 1. Briefly describe the structure of the following:(a) Brain (b) Eye (c) EarSolution: (a) Brain: The brain acts as control and command system of the body. It is protected by skull and is covered…
Chapter 20: Locomotion and Movement
NCERT TEXTBOOK QUESTIONS FROM SOLVED 1. Draw the diagram of a sarcomere of skeletal muscle showing different regions.Solution: 2. Define sliding filament theory of muscle contraction.Solution: According to sliding filament theory of muscle contraction, the actin and myosin…
Chapter 19: Excretory Products and their Elimination
NCERT TEXTBOOK QUESTIONS FROM SOLVED 1.Define Glomerular Filtration Rate (GFR).Solution. The amount of filtrate formed by the kidneys per minute is called glomerular filtration rate (GFR). It is approximately 125 mL/min. in a healthy person. 2.Explain the autoregulatory…
Chapter 18: Body Fluids and Circulation
1. Name the components of the formed elements in the blood and mention one major function of each of them.Solution: Blood corpuscles are the formed elements in the blood, they constitute 45% of the blood. Formed elements are…
Chapter 17: Breathing and Exchange of Gases
1. Define vital capacity. What is its significance?Solution: Vital capacity is defined as the maximum volume of air a person can breathe in after a forced expiration or the maximum volume of air a person can breathe out…
Chapter 16: Environmental Issues
1. What are the various constituents of domestic sewage? Discuss the effects of sewage discharge on a river.Ans: Domestic sewage contains four kind of impurities:(i) Suspended solids: They are soil particles such as sand and silt.(ii) Colloidal particles: They are…
Chapter 16: Digestion and Absorption
1. 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 rennin.(b) Succus entericus is the name given to(i) a junction between…
Chapter 15: Biodiversity and Conservation
1. Name the three important components of biodiversity.Ans: Three components of biodiversity are:(a) Genetic diversity(b) Species diversity(c) Ecological diversity 2. How do ecologists estimate the total number of species present in the world?Ans: Ecologists estimate the total number of…
Chapter 15: Plant Growth and Development
NCERT TEXTBOOK QUESTIONS FROM SOLVED 1. Define growth, differentiation, development, dedifferentiation, redifferentiation, determinate growth, meristem and growth rate.Solution: Growth is defined as a vital process which brings about an irreversible and permanent change in the shape, size, form, weight…
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