Chapter 22 Chemical Coordination and Integration
Chapter 22 Chemical Coordination and Integration Question 1. Define the following: (a) Exocrine glands (b) Endocrine glands Hormones Solution: (a) Glands with duct is known as an exocrine gland. They secrete their secretions through ducts. Eg: Pancreas. (b) Gland without duct is known as an endocrine gland. They directly secrete their secretions. Eg: Pituitary gland. […]
Chapter 21 Neural control and co-ordination
Chapter 21 Neural control and co-ordination Question 1. Briefly describe the structure of the following: (a) Brain(b) Eye (c) Ear Solution: Structure of brain: The brain is the central information processing organ of the body, The human brain is well protected by the skull. Inside the skull, cranial meninges cover the brain. These are tough […]
Chapter 20 Locomotion and Movement
Chapter 20 Locomotion and Movement Question 1. Draw the diagram of a sarcomere of skeletal. Solution: Question 2. Define sliding filament theory of muscle contraction. Solution: The mechanism of muscle contraction is best explained by the sliding filament theory which states that contraction of a muscle fiber takes place by sliding of the thin filaments […]
Chapter 19 Excretory Products and their Elimination
Chapter 19 Excretory Products and their Elimination Question 1. Define Glomerular Filtration Rate (GFR). Solution: The amount of filtrate formed by the kidneys per minute is called glomerular filtration rater (GFR). GFR in a healthy individual is approximately 125ml/minute i.e. 180 lines per day. Question 2. Explain the autoregulatory mechanism of GFR. Solution: This mechanism […]
Chapter 18 Body Fluids and Circulation
Chapter 18 Body Fluids and Circulation Question 1. Name the components of formed elements in the blood and mention one major function of each of them. Solution: Blood is a mobile connective tissue composed of a fluid, the plasma and formed elements. Formed elements includes erythrocytes, leucocytes and platelets. Blood corpuscles. (a) Erythrocytes are the most […]
Chapter 17 Breathing and Exchange of Gases
Chapter 17 Breathing and Exchange of Gases Question 1. Define vital capacity. What is its significance? Solution: The maximum volume of air a person can breathe in after a forced expiration it is about 4000mL in a normal adult person. Vital capacity is higher in athletes and singers. Cigarette smokers have a lower vital capacity […]
Chapter 16 Digestion and Absorption
Chapter 16 Digestion and Absorption Question 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) Succuss enterics is the name given to: (i) a junction between the ileum and large intestine […]
Chapter 15 Plant Growth and Development
Chapter 15 Plant Growth and Development Question 1. Define growth, differentiation, development, dedifferentiation, redifferentiation, determinate growth, meristem, and growth rate. Solution: (1) Growth: Growth is accompanied by metabolic processes (both anabolic and catabolic), that occur at the expense of energy. For example, the expansion of a leaf is growth. (2) Differentiation: The cells derived from […]
Chapter 14 Respiration in Plants
Chapter 14 Respiration in Plants Question 1. Differentiate between (a) Respiration and Combustion (b) Glycolysis and Krebs’ cycle (c) Aerobic respiration and Fermentation Solution: (a) Differences between respiration and combustion are as follows : (b) Differences between glycolysis and krebs’ cycle are as follows : (c) Differences between aerobic respiration and fermentation are as follows : Question 2. […]
Chapter 13 Photosynthesis
Chapter 13 Photosynthesis Question 1. By looking at a plant externally can you tell whether a plant is C3 or C4 ? Why and how? Solution: Plants that are adapted to dry tropical regions have the C4 pathway. They have a special type of leaf anatomy, they tolerate higher temperatures, they show a response to highlight intensities. Study […]