CBSE Class 11 (Science) Chemical Coordination and Integration — practice questions
93 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 (Science) Chemical Coordination and Integration in the app →The resting membrane potential of a typical neuron is approximatelyThe rapid depolarisation phase of an action potential is caused bySignals between two neurons across a chemical synapse are transmitted byThe neurotransmitter released at the NEUROMUSCULAR JUNCTION is:The cerebral lobe primarily responsible for VISION is the:The 'fight-or-flight' response is primarily mediated by the:In the retina of the human eye, the COLOUR + sharp daylight vision is mediated by:PARKINSON'S DISEASE is caused primarily by:Why are endocrine glands called ductless glands?Under the current definition, hormones are best described as:Which kind of animals have very simple endocrine systems with few hormones?The hypothalamus forms the basal part of which brain region?Hypothalamic hormones that stimulate pituitary secretion are called:Which hypothalamic hormone inhibits release of growth hormone?GnRH from the hypothalamus acts by stimulating the pituitary to release:Hypothalamic hormones reach the anterior pituitary through which route?Which part of the pituitary is under direct neural regulation of the hypothalamus?The adenohypophysis consists of which two portions?The pars distalis is commonly known as the:Which pituitary hormone is secreted by the pars intermedia?Which two hormones are stored and released by the neurohypophysis?Over-secretion of growth hormone in a child leads to:Low secretion of growth hormone results in:Excess growth hormone in middle-aged adults causes severe facial disfigurement called:Prolactin regulates growth of the mammary glands and:TSH from the pituitary stimulates which gland?ACTH stimulates the adrenal cortex to secrete:Why are LH and FSH called gonadotrophins?In males, LH stimulates the testis to produce:In males, spermatogenesis is regulated by FSH together with:In females, LH induces ovulation of which structure?The corpus luteum forms from the remnants of the:In females, FSH stimulates growth and development of the:MSH regulates which feature of the skin?Oxytocin acts mainly on which tissue?At childbirth, oxytocin causes vigorous contraction of the:Vasopressin is also called ADH because it:Impaired synthesis or release of ADH causes:The pineal gland lies on which side of the forebrain?The hormone secreted by the pineal gland is:Melatonin regulates which rhythm of the body?Which of these is NOT influenced by melatonin?The two lobes of the thyroid gland are joined by a thin flap called the:The thyroid lies on either side of which structure?Thyroid hormones are synthesised by the:Which mineral is essential for normal thyroid hormone synthesis?Dietary iodine deficiency causes hypothyroidism and enlargement of the thyroid, called:Hypothyroidism in a pregnant woman can cause which defect in the baby?In adult women, hypothyroidism may cause the menstrual cycle to become:Exophthalmic goitre, also called Graves disease, is a form of:A patient has bulging eyes, high metabolic rate and weight loss. Which condition fits?Thyroid hormones play an important role in regulating the:The protein hormone thyrocalcitonin (TCT) regulates the level of:How many parathyroid glands are present in humans?The secretion of parathyroid hormone is regulated by circulating levels of:PTH raises blood calcium partly by stimulating which process in bones?Which gland plays a major role in development of the immune system?Thymosins promote differentiation of which cells?Why do old persons have weaker immune responses?Where is the thymus located?The adrenal glands are located:The centrally located tissue of the adrenal gland is the:Underproduction of adrenal cortex hormones causes weakness, fatigue and:Adrenaline and noradrenaline are together called:Which hormones are known as hormones of fight or flight?Which effect is NOT produced by adrenaline and noradrenaline?Catecholamines raise blood glucose by stimulating the breakdown of:Which is the inner layer of the adrenal cortex?The main glucocorticoid in the human body is:Which process do glucocorticoids stimulate?Cortisol is known to produce which reaction and suppress immunity?Aldosterone acts mainly at the renal tubules to stimulate reabsorption of:Androgenic steroids from the adrenal cortex help growth of which feature at puberty?The pancreas acts as which kind of gland?Which cells of the islets secrete glucagon?Glucagon acts mainly on which cells to raise blood sugar?Insulin acts mainly on hepatocytes and which other cells?Insulin lowers blood glucose partly by promoting conversion of glucose to:Prolonged hyperglycemia leads to which disorder?Diabetic patients are successfully treated with:Leydig cells of the testis produce a group of hormones called:Which feature is NOT stimulated by androgens?The testis works as a primary sex organ and also as a(n):The ovary produces how many ova during each menstrual cycle?Which hormone, made by the atrial wall of the heart, lowers blood pressure?Erythropoietin, which stimulates formation of RBCs, is produced by the:Gastrin stimulates the gastric glands to secrete:Secretin acts on the exocrine pancreas to stimulate release of:Most intracellular hormone receptors are located in the:Which of these is a steroid hormone?Epinephrine belongs to which chemical group of hormones?Hormones that bind membrane-bound receptors usually act by generating:Hormone-receptor complexes of steroid hormones mainly regulate: