Please refer to Chemical Coordination and Integration Class 11 Biology Important Questions with solutions provided below. These questions and answers have been provided for Class 11 Biology based on the latest syllabus and examination guidelines issued by CBSE, NCERT, and KVS. Students should learn these problem solutions as it will help them to gain more marks in examinations. We have provided Important Questions for Class 11 Biology for all chapters in your book. These Board exam questions have been designed by expert teachers of Standard 11.
Class 11 Biology Important Questions Chemical Coordination and Integration
Objective Type Questions
Question. Anterior lobe of pituitary secretes
(a) ACTH, TSH and oxytocin
(b) STH, GH and ADH
(c) TSH, ADH and prolactin
(d) FSH, GH and LH
Question. ACTH is secreted by
(a) adrenal cortex
(c) adrenal medulla
Question. Oxytocin hormone is produced by
Question. Ovulation and formation of corpus luteum is controlled by
(c) thyroxine hormone
(d) luteinizing hormone
Question. Secretion of estrogen is controlled by
Question. Anti-ageing hormone is
Question. When amount of ADH decreases in blood, micturition
(c) remains unaffected
(d) increases and then decreases
Question. Which of the following occurs due to ADH deficiency?
(a) Increase urine output.
(b) Increased water in urine.
(c) Less urine.
(d) No urination.
Question. Which endocrine gland stores its secretion in extracellular spaces before discharging it into blood?
Question. Abnormal secretion of thyroxine produces
(b) Addison’s disease
Question. Which of the following is (are) not influenced by parathyroid hormone ?
(c) Small intestine
(d) None of the above
Question. Thymus in mammals is mainly concerned with
(a) regulation of body growth.
(b) secretion of thyrotropin.
(c) regulation of body temperature.
(d) immunological functions.
Question. Which hormone possesses anti-insulin effect?
Statement Type Questions
Question. Mark the correct statement regarding somatostatin.
(a) It is secreted from anterior pituitary.
(b) It inhibits the release of growth hormone.
(c) It is secreted from posterior pituitary.
(d) It stimulates STH secretion.
Question. Which statement regarding PTH is correct?
(a) It is a peptide hormone.
(b) It stimulates bone resorption.
(c) It is hypercalcemic hormone.
(d) All of the above.
Question. Which of the following is correct for thyrocalcitonin ?
(a) Produced by parathyroid and decreases Ca++ in ECF.
(b) Produced by thyroid and decreases Ca++ in ECF.
(c) Produced by parathyroid and increases Ca++ in ECF.
(d) Produced by thyroid and increases Ca++ in ECF.
Question. Hormones of pituitary gland are
(a) some steroids and some proteins
(b) all proteins/peptides.
(c) complex substances formed from proteins, steroids, carbohydrates.
(d) all steroids.
Question. Choose the correct statement about ‘neurohypophysis’ ?
(a) It stores and release hormones secreted by hypothalamus.
(b) It secretes its own hormones.
(c) It is poorly developed and functionless in humans.
(d) It stores the hormones produced by adenohypophysis.
Question. A woman may develop beard and moustaches due to
(a) hypersecretion of adrenal cortex.
(b) hypersecretion of thyroxine.
(c) hyposecretion of adrenaline.
(d) hyposecretion of thyroxine.
Question. Which of the following statement about the hormone action in humans is correct ?
(a) In females, FSH first binds with specific receptors on ovarian cell membrane.
(b) FSH stimulates the secretion of estrogen and progesterone.
(c) Glucagon is secreted by b-cells of Islets of langerhans and stimulates glycogenolysis.
(d) Secretion of thymosin is stimulated with ageing.
Diagram Type Questions
Question. The given figure shows the hormonal control of female reproductive system in which few steps are marked as A, B, C and D. Identify the correct labelling.
(a) A- GnRH, B – TSH, C – LTH, D – Uterus
(b) A – GnRH, B – FSH/LH, C – Estrogen or progesterone, D – urerus
(c) A – GnRH, B – STH, C – LH, D – Uterus
(d) A – GnRH, B – ACTH, C – LH, D – Uterus
Question. The hormone released by label “X” in the given figure helps to restore Y. Identify X and Y.
|(a) Thyroxine||Too much calcium in the blood.|
|(b) PTH||Lowered levels of calcium in blood.|
|(c) Thymosin||Decreased level of blood sugar.|
|(d) Adrenaline||Excessive loss of sodium in extracellular fluid.|
Question. Which of the following disease is caused due to over secretion of the structure marked as X?
(b) Diabetes mellitus
(c) Diabetes insipidus
(d) Grave’s disease
Question. Which endocrine gland secretes the hormone that causes the abnormalities shown in the below picture?
Direction : The endocrine glands A and B in the given figure represent ___ (i) ____ and ____ (ii) ____ respectively.
Question. Identify the hormone represented by lines 1 and 2?
(a) 1- ACTH, 2- Aldosterone
(b) 1- ACTH, 2- Adrenaline
(c) 1- TSH, 2- Thyroxine
(d) 1- TSH, 2- Aldosterone
Critical Thinking Type Questions
Question. The number of hormones secreted by anterior pituitary is
Question. Pancreatic duct of a healthy dog is blocked. Which of the following function of pancreas will not be affected ?
(a) Maintenance of normal blood sugar level.
(b) Carbohydrate digestion.
(c) Protein digestion.
(d) Neutralization of chyme.
Question. Which of the following endocrine glands grows to the maximum size at puberty and then diminishes gradually?
Question. Which of the following disorders are caused by hypersecretion of their concerned hormones ?
(a) gigantism and exophthalmic goitre
(b) tetany and myxoedema
(c) diabetes mellitus and goitre
(d) rickets and diabetes insipidus
Question. Growth hormone of pituitary is more effective in
(a) presence of thyroxine.
(b) absence of thyroxine.
(c) absence of insulin.
(d) presence of adrenaline.
Question. Hormones involved in carbohydrate metabolism are
(a) insulin, glucagon, epinephrine and calcitonin
(b) insulin, glucagon, epinephrine and glucocorticoids
(c) insulin, glucagon, cortisol and melatonin
(d) insulin, glucagon, norepinephrine and melatonin
Question. A man suffering from diabetes mellitus drinks water more frequently as he has to eliminate from blood, the extra
Question. Injection of glucagon will
(a) cause goitre
(b) cause galactosemia
(c) cause hypoglycemia
(d) increase blood sugar level
Question. Point out the odd one:
Question. A patient of diabetes mellitus excretes glucose in urine even when he is kept in a carbohydrate free diet. It is because
(a) fats are catabolised to form glucose.
(b) amino acids are catabolised in liver.
(c) amino acids are discharged in blood stream from liver.
(d) glycogen from muscles are released in the blood stream.