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NEET • BIOLOGY • CHEMICAL COORDINATION AND INTEGRATION
Chemical coordination and integration practice · Mixed difficulty
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121
Medium
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Analyzing
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Assertion: A tumor of adrenal cortex may cause
Addison’s disease.
Reason: This happens due to over secretion of
cortisol by the tumor
Addison’s disease.
Reason: This happens due to over secretion of
cortisol by the tumor
View answer and explanation
Correct option: D
If both Assertion and Reason are false
Option D (both Assertion and Reason are false) is correct because a tumor of the adrenal cortex typically causes Cushing's syndrome due to oversecretion of cortisol, not Addison's disease which is caused by hyposecretion.
122
Medium
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Remembering
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Which hormone secreted by the pineal gland
View answer and explanation
Correct option: A
Melatonin
Option A (Melatonin) is correct because the pineal gland primarily secretes melatonin, which regulates sleep-wake cycles.
123
Easy
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Remembering
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Which of the following is gastrointestine hormone?
View answer and explanation
Correct option: B
Enterogastrone
Option B (Enterogastrone) is correct because enterogastrone is a hormone secreted by the duodenum that inhibits gastric secretion and motility.
124
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Understanding
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Assertion: Neurohypophysis is under the direct regulation of the hypothalamus
Reason: Neurohypophysis stores and releases two hormones called oxytocin and vasopressin which are actually synthesized by hypothalamus.
Reason: Neurohypophysis stores and releases two hormones called oxytocin and vasopressin which are actually synthesized by hypothalamus.
View answer and explanation
Correct option: C
Both (A) and (R) are true and (R) is the correct explanation of (A)
The correct answer is C (Both (A) and (R) are true and (R) is the correct explanation of (A)) because the neurohypophysis's function is directly controlled by the hypothalamus, which synthesizes the hormones it releases.
125
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Application
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A 35year old man has extremely long limbs and digits. He also has serve disfigurement of the facial
features. Which of the following could be a probable cause for it?
features. Which of the following could be a probable cause for it?
View answer and explanation
Correct option: B
Hypersecretion of a hormone from adenohypophysis
Option B (Hypersecretion of a hormone from adenohypophysis) is correct because the adenohypophysis (anterior pituitary) secretes growth hormone, and its hypersecretion in adults leads to acromegaly, characterized by elongated limbs, digits, and facial disfigurement.
126
Hard
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Remembering
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In Human pancreas representing only _________ percentage of endocrine part and it consists of ______ cells.
View answer and explanation
Correct option: C
X - 1 to 2 %, Y - Islets of Langerhans
Option C (X - 1 to 2 %, Y - Islets of Langerhans) is correct because the endocrine part of the pancreas is only 1-2% and consists of Islets of Langerhans.
127
Medium
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Understanding
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All of the following hormones interact with membrane bound receptors except
View answer and explanation
Correct option: C
Cortisol
Option C (Cortisol) is correct because cortisol, being a steroid hormone, interacts with intracellular receptors, while the others interact with membrane-bound receptors.
128
Medium
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Remembering
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Name of peptide hormone which acts mainly on hepatocytes, adipocytes and enhances cellular glucose uptake and utilization.
View answer and explanation
Correct option: B
Insulin
The correct answer is Insulin because it is a peptide hormone that enhances cellular glucose uptake and utilization, particularly in hepatocytes and adipocytes.
129
Medium
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Remembering
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‘Myasthenia gravis’ is related to which hormone?
View answer and explanation
Correct option: C
Thymosine hormone
The correct answer is C (Thymosine hormone) because Myasthenia gravis is an autoimmune neuromuscular disease where antibodies block or destroy acetylcholine receptors, and the thymus gland, which produces thymosin, is often abnormal in these patients.
130
Medium
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Analyzing
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Select the odd one w.r.t. the hormones secreted from the thyroid gland
View answer and explanation
Correct option: B
Parathormone
Option B (Parathormone) is correct because parathormone is secreted by the parathyroid gland, while the others are secreted by the thyroid gland.
131
Easy
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Understanding
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…A… is essential for the normal rate of hormone synthesis in the thyroid. Deficiency of iodine in our diet results in …B… and enlargement of the thyroid gland, commonly called …C…
Select the correct combination for A, B and C
Select the correct combination for A, B and C
View answer and explanation
Correct option: B
A-Iodine, B-hypothyroidism, C-goitre
Option B (A-Iodine, B-hypothyroidism, C-goitre) is correct because iodine is essential for thyroid hormone synthesis, its deficiency leads to hypothyroidism and goitre.
132
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Remembering
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‘ANF’ is secretes by
View answer and explanation
Correct option: B
Atrial wall of heart
Option B (Atrial wall of heart) is correct because ANF (Atrial Natriuretic Factor) is secreted by the atrial wall of the heart in response to increased blood volume.
133
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Understanding
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I. Somatostatin inhibits intestinal absorption of glucose, II. Leydig’s cell secrete progesterone, III. Melatonin is secreted by pineal gland, IV. Myxoedema is a thyroid disorder, V. Neurohypophysis secreteS ACTH . Select the correct statements and choose the option
View answer and explanation
Correct option: A
I, III and IV
Option A (I, III and IV) is correct because statements I, III, and IV are accurate descriptions of hormone functions and gland characteristics.
134
Easy
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Remembering
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Immune response of old age person becomes weak due to the degeneration of ……. Gland
View answer and explanation
Correct option: C
Thymus
Option C (Thymus) is correct because the thymus gland degenerates with age, leading to a weakened immune response due to decreased T-lymphocyte production.
135
Easy
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Understanding
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Goiter can occur as a consequence of all the following except
View answer and explanation
Correct option: D
Excessive intake of exogenous thyroxine
Option D (Excessive intake of exogenous thyroxine) is correct because excessive thyroxine intake would suppress TSH and prevent goiter formation, while the other options can cause goiter.
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Understanding
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Which of the following hormone is synthesized at the location different from its storage and release site?
View answer and explanation
Correct option: A
Vasopressin
The correct answer is A (Vasopressin) because it is synthesized in the hypothalamus and stored/released from the posterior pituitary.
137
Medium
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Understanding
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Read the given statements and select the correct option.
Statement A:- The testis secretes androgens which stimulate enythropoiesis.
Statement B:- The atrial wall of the heart produces atrial natriuretic factor which increases the blood pressure.
Statement A:- The testis secretes androgens which stimulate enythropoiesis.
Statement B:- The atrial wall of the heart produces atrial natriuretic factor which increases the blood pressure.
View answer and explanation
Correct option: B
Both the statements are incorrect.
Option B (Both the statements are incorrect) is correct because the testis secretes androgens which do not stimulate erythropoiesis, and ANF decreases blood pressure, not increases it.
138
Easy
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Remembering
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In human adults females, oxytocin
View answer and explanation
Correct option: D
Causes strong uterine contractions during parturition
Option D (Causes strong uterine contractions during parturition) is correct because oxytocin's primary role is to stimulate uterine contractions during childbirth.
139
Medium
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Remembering
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Steroid hormone is derived from
View answer and explanation
Correct option: B
Cholesterol
Option B (Cholesterol) is correct because steroid hormones are derived from cholesterol.
140
Easy
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Remembering
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Which of the following is not a second messenger?
View answer and explanation
Correct option: A
Adenylate cyclase
Option A (Adenylate cyclase) is correct because adenylate cyclase is an enzyme that produces a second messenger (cAMP), but is not itself a second messenger.
141
Easy
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Remembering
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Vitamin that has similar action as the parathormone is
View answer and explanation
Correct option: D
Vitamin-D
Option D (Vitamin-D) is correct because Vitamin D, like parathormone, plays a crucial role in calcium regulation in the body.
142
Easy
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Remembering
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Which lobe of pituitary is connected to hypothalamus through hypophyseal portal system?
View answer and explanation
Correct option: B
Adenohypophysis
Option B is correct because the adenohypophysis (anterior pituitary) is connected to the hypothalamus through the hypophyseal portal system, which allows for direct communication and regulation.
143
Medium
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Remembering
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Which hormone secreted by pars intermedia
View answer and explanation
Correct option: A
MSH
Option A is correct because the pars intermedia of the pituitary gland secretes melanocyte-stimulating hormone (MSH), which influences skin pigmentation.
144
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Remembering
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Hypothalamus contains several group of neurosecretory cells called
View answer and explanation
Correct option: C
Nuclei
The correct answer is Nuclei because the hypothalamus contains clusters of neuron cell bodies called nuclei.
145
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Remembering
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Hormones provides coordination in
View answer and explanation
Correct option: A
Vertebrates
Option A (Vertebrates) is correct because hormones primarily coordinate functions in vertebrates.
146
Easy
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Understanding
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Lipid soluble hormone works by interacting with
View answer and explanation
Correct option: A
Intracellular receptors
Option A (Intracellular receptors) is correct because lipid-soluble hormones can cross the cell membrane and bind to receptors inside the cell.
147
Easy
147 of 381
Remembering
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The cause of cretinism is
View answer and explanation
Correct option: A
Hypothyroidism
Option A (Hypothyroidism) is correct because cretinism is a condition caused by severe thyroid hormone deficiency during infancy or early childhood.
148
Medium
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Remembering
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Which is not a symptom of exophthalmic goiter?
View answer and explanation
Correct option: A
Degenerating sex organs
Option D (Excess of parathormone would cause parathyroid tetany) is correct because excess parathormone leads to hypercalcemia, while parathyroid tetany is caused by hypocalcemia due to parathormone deficiency.
149
Medium
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Remembering
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During emergency which of the following hormone is secreted?
View answer and explanation
Correct option: C
Adrenaline
Option C (Adrenaline) is correct because adrenaline is the hormone secreted during emergency situations to prepare the body for \"fight or flight.\"
150
Easy
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Remembering
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A pair of testis are present in the …… of humans (male)
View answer and explanation
Correct option: B
Scrotal sac
Option B (Scrotal sac) is correct because the testes are located within the scrotal sac in males.
Revision notes and key takeaways
Review CHEMICAL COORDINATION AND INTEGRATION in your textbook or class notes, then use this set to check your understanding.
Showing 121-150 of 381 questions