Chemical Coordination and Integration Class 11 Biology Important Questions

Important Questions Class 11

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

Answer

D

Question. ACTH is secreted by
(a) adrenal cortex
(b) pituitary
(c) adrenal medulla
(d) thyroid

Answer

B

Question. Oxytocin hormone is produced by
(a) pituitary
(b) adrenals
(c) hypothalamus
(d) thyroid

Answer

A

Question. Ovulation and formation of corpus luteum is controlled by
(a) ICSH
(b) FSH
(c) thyroxine hormone
(d) luteinizing hormone

Answer

B

Question. Secretion of estrogen is controlled by
(a) hCG
(b) FSH
(c) progesterone
(d) testosterone

Answer

B

Question. Anti-ageing hormone is
(a) thyroxine
(b) melatonin
(c) estrogen
(d) testosterone

Answer

B

Question. When amount of ADH decreases in blood, micturition
(a) increases
(b) decreases
(c) remains unaffected
(d) increases and then decreases

Answer

A

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.

Answer

B

Question. Which endocrine gland stores its secretion in extracellular spaces before discharging it into blood?
(a) Testis
(b) Pancreas
(c) Thyroid
(d) Adrenal

Answer

C

Question. Abnormal secretion of thyroxine produces
(a) acromegaly
(b) Addison’s disease
(c) cretinism
(d) goitre

Answer

C

Question. Which of the following is (are) not influenced by parathyroid hormone ?
(a) Kidney
(b) Bone
(c) Small intestine
(d) None of the above

Answer

D

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.

Answer

D

Question. Which hormone possesses anti-insulin effect?
(a) Cortisol
(b) Calcitonin
(c) Oxytocin
(d) Aldosterone

Answer

A

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.

Answer

B

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.

Answer

D

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.

Answer

B

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.

Answer

B

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.

Answer

A

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.

Answer

A

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.

Answer

A

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.

Chemical Coordination and Integration Class 11 Biology Important Questions

(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

Answer

B

Question. The hormone released by label “X” in the given figure helps to restore Y. Identify X and Y.

Chemical Coordination and Integration Class 11 Biology Important Questions
X 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.
Answer

B

Question. Which of the following disease is caused due to over secretion of the structure marked as X?

Chemical Coordination and Integration Class 11 Biology Important Questions

(a) Gigantism
(b) Diabetes mellitus
(c) Diabetes insipidus
(d) Grave’s disease

Answer

D

Question. Which endocrine gland secretes the hormone that causes the abnormalities shown in the below picture?

Chemical Coordination and Integration Class 11 Biology Important Questions

(a) Hypothalamus
(b) Pancreas
(c) Adenohypophysis
(d) Neurohypophysis

Answer

C

Direction : The endocrine glands A and B in the given figure represent ___ (i) ____ and ____ (ii) ____ respectively.

Chemical Coordination and Integration Class 11 Biology Important Questions


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

Answer

A

Critical Thinking Type Questions

Question. The number of hormones secreted by anterior pituitary is
(a) 3
(b) 4
(c) 6
(d) 8

Answer

C

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.

Answer

A

Question. Which of the following endocrine glands grows to the maximum size at puberty and then diminishes gradually?
(a) Thymus
(b) Pituitary
(c) Thyroid
(d) Adrenal

Answer

A

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

Answer

A

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.

Answer

A

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

Answer

B

Question. A man suffering from diabetes mellitus drinks water more frequently as he has to eliminate from blood, the extra
(a) salts
(b) sugar
(c) insulin
(d) protein

Answer

B

Question. Injection of glucagon will
(a) cause goitre
(b) cause galactosemia
(c) cause hypoglycemia
(d) increase blood sugar level

Answer

D

Question. Point out the odd one:
(a) Corticotropin
(b) Vasopressin
(c) Noradrenaline
(d) Prolactin

Answer

C

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.

Answer

A

Chemical Coordination and Integration Class 11 Biology Important Questions