Assertion (A): Deficiency of Antidiuretic hormone causes an increase in urination.
Reason (R): Antidiuretic hormone acts on the kidney to reabsorb water from the kidney tubules.
(a) A is True and R is False
(b) A is False and R is True
(c) Both A and R are True
(d) Both A and R are False
(c) Both A and R are True
Explanation: ADH helps the kidneys reabsorb water. When ADH is deficient, less water is reabsorbed and more urine is produced.
More ICSE Moderate level questions
Observe the following picture, identify the defect and the cause of the defect. (a) Simple goitre, under secretion of thyroxine. (b) Ex-ophthalmic goitre, over secretion of thyroxine. (c) Simple goitre, over secretion of thyroxine. (d) Ex-ophthalmic goitre, under secretion of thyroxine.
Arrange the terms in each group in the correct order. Write them in a logical sequence beginning with the term that is underlined. (a) Palisade cells, Cuticle, Upper epidermis, Spongy cells. (b) Hepatic portal vein, Stomach, Hepatic vein, Liver. (c) Cyton, Dendrites, Synaptic cleft, Axon endings. (d) Insulin release, High blood sugar, Lowers blood sugar, Stimulates glucose uptake from blood. (e) Sperm duct, Seminiferous tubule, Epididymis, Efferent ducts.
Given below is an outline of the human body showing the important endocrine glands. Match the glands marked (a) to (e) with their correct functions: Example: (f) – 6. Secretes Testosterone. Endocrine Gland Functions (1) Prepares the body to face stress. (2) Secretes tropic hormones (3) Secretes Oestrogens (4) Maintains blood sugar level (5) Regulates basal metabolism (6) Secretes Testosterone.
What is Micturition? Explain.
Explain the term Excretion.
The hormone that induces vigorous contractions of the uterus in a pregnant mother is: (a) Oestrogen (b) Prolactin (c) Oxytocin (d) Progesterone
Name the following: (a) Unicellular outgrowths of the epidermis of roots. (b) The defect of the eye in which some parts of an object are focused while other parts appear blurred. (c) The tropic movement in response to chemicals. (d) The main nitrogenous waste in the human body. (e) The attachment of the fertilized ovum to the wall of the uterus.
Match the items in Column I with those in Column II: Column I Column II Leydig cells Lack of thyroxine in children Stoma 12 pairs Ova Testosterone Cranial nerve Diffusion of respiratory gases Cretinism Haploid cells 31 pairs Diploid cells
Structures shown: Renal medulla, Renal artery, Renal vein, Pelvis, Ureter and Renal cortex. Structure Label Function (a) Has Malpighian capsules (b) Carries oxygenated blood (c) Transports urine to urinary bladder (d) Has Henle's loops (e) Carries deoxygenated blood (f) Receives urine which flows into ureter Example: Pelvis - (f)
Arrange the following in a logical sequence: (a) Australopithecus, Cro-Magnon, Homo erectus, Neanderthal man. (b) Pupil, Aqueous humour, Retina, Vitreous humour. (c) Effector, Receptor, Motor neuron, Sensory neuron. (d) Loop of Henle, Distal convoluted tubule, Bowman’s Capsule, Proximal convoluted tubule. (e) Water vapour, Soil water, Leaves, Ascent of Sap.
Renal cortex has a dotted appearance and Renal medulla has a striped appearance. Explain.
Mohit, a 30-year-old man was a software professional leading a sedentary life. He showed signs of high blood sugar during a routine health check-up despite having a normal body weight. Answer the following: (a) The hormonal disorder he is suffering from. (b) The hormone responsible for this disorder. (c) The organ that secretes this hormone. (d) One symptom experienced by Mohit due to this disorder. (e) One change in lifestyle to lower the blood sugar level.
