Chemical Coordination and Integration
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Endocrine glands and hormones
SubtopicEndocrine glands and hormones under Chemical Coordination and Integration for Grade 11 CBSE.
Preview questions (no answers)
- 1.
What is the function of Gastric Inhibitory Peptide (GIP)?
A.Stimulates gastric secretion
B.Inhibits gastric secretion and motility
C.Stimulates pancreatic enzymes
D.Increases blood pressure
- 2.
Which gland is composed of follicles and stromal tissues?
A.Pituitary
B.Thyroid
C.Adrenal
D.Pancreas
- 3.
Hormones are defined as non-nutrient chemicals which act as:
A.Enzymes
B.Intercellular messengers
C.Energy sources
D.Structural proteins
- 4.
The primary lymphoid organ where T-lymphocytes mature and whose hormone promotes immunity is the:
A.Spleen
B.Thymus
C.Bone marrow
D.Tonsils
- 5.
Identify the hormone that is antagonistic to Insulin in its effect on blood glucose levels.
A.Thyroxine
B.Glucagon
C.Oxytocin
D.Secretin
- 6.
The hormone that stimulates the production of RBCs (erythropoiesis) can be secreted by which of the following organs?
A.Kidney
B.Thyroid
C.Adrenal Cortex
D.All of the above
- 7.
Which hormone is primarily responsible for the development of secondary sexual characters in females, such as high pitch of voice?
A.Progesterone
B.Estrogen
C.Testosterone
D.Aldosterone
- 8.
The part of the pituitary gland that is virtually absent in humans but prominent in some other vertebrates is:
A.Pars distalis
B.Pars intermedia
C.Pars nervosa
D.Neurohypophysis
- 9.
Which of the following hormones does NOT use a secondary messenger mechanism for its action?
A.Insulin
B.Adrenaline
C.Estrogen
D.FSH
- 10.
In the case of a deficiency of ADH, a person passes out a large amount of urine and drinks much water. This condition is known as:
A.Diabetes mellitus
B.Diabetes insipidus
C.Glycosuria
D.Ketosis
Download the worksheet for Chemical Coordination and Integration - Endocrine glands and hormones to practice offline. It includes additional chapter-level practice questions.
Human endocrine system (Pituitary, Pineal, Thyroid, Parathyroid, Adrenal, Pancreas, Gonads)
SubtopicHuman endocrine system (Pituitary, Pineal, Thyroid, Parathyroid, Adrenal, Pancreas, Gonads) under Chemical Coordination and Integration for Grade 11 CBSE.
Preview questions (no answers)
- 1.
Failure of the posterior pituitary to release adequate results in a condition characterized by water loss and thirst called:
A.Diabetes mellitus
B.Diabetes insipidus
C.Addison's disease
D.Goitre
- 2.
Which hormone is responsible for maintaining the corpus luteum and inducing ovulation of fully mature follicles?
A.FSH
B.LH
C.ACTH
D.ADH
- 3.
Glucagon acts primarily on which organ to stimulate glycogenolysis?
A.Pancreas
B.Liver
C.Kidney
D.Heart
- 4.
Which of the following hormones is NOT produced by the anterior pituitary?
A.Growth hormone
B.Prolactin
C.Oxytocin
D.Thyroid stimulating hormone
- 5.
Hyperthyroidism, which can be caused by cancer of the thyroid gland or nodules, results in an abnormally high level of thyroid hormones. This state most significantly affects:
A.Body temperature only
B.Pigmentation only
C.Body physiology and metabolism
D.Only the sleep-wake cycle
- 6.
The release of gonadotropins ( and ) from the pituitary gland is under the direct control of which hypothalamic hormone?
A.Somatostatin
B.GnRH
C.Oxytocin
D.Vasopressin
- 7.
In the pancreas, which cells are responsible for secreting glucagon?
A.Beta cells
B.Delta cells
C.Alpha cells
D.F-cells
- 8.
Which of the following hormones is not a peptide or protein?
A.Insulin
B.Glucagon
C.Epinephrine
D.Pituitary hormones
- 9.
Cretinism is a condition resulting from hypothyroidism during pregnancy. Which of the following is NOT a symptom of cretinism in the baby?
A.Stunted growth (mental and physical).
B.Low Intelligence Quotient (IQ).
C.Abnormal skin and deaf-mutism.
D.Increased metabolic rate and bulging eyes.
- 10.
Which hormone is specifically involved in the 'Milk Ejection Reflex' and is often termed the 'Birth Hormone'?
A.Prolactin
B.Oxytocin
C.Vasopressin
D.Estrogen
Download the worksheet for Chemical Coordination and Integration - Human endocrine system (Pituitary, Pineal, Thyroid, Parathyroid, Adrenal, Pancreas, Gonads) to practice offline. It includes additional chapter-level practice questions.
Mechanism of hormone action
SubtopicMechanism of hormone action under Chemical Coordination and Integration for Grade 11 CBSE.
Preview questions (no answers)
- 1.
Biochemical changes in the cell following hormone binding are collectively called:
A.Homeostasis
B.Signal transduction
C.Feedback inhibition
D.Metabolic breakdown
- 2.
Which hormone is chemically a large protein?
A.Cortisol
B.Thyroxine
C.Insulin
D.Adrenaline
- 3.
In the case of hormones that interact with intracellular receptors, the hormone-receptor complex usually affects:
A.Membrane permeability
B.The genome
C.Ribosomal structure
D.Mitochondrial count
- 4.
How many major types of receptors exist based on their location in the target cell?
A.One
B.Two
C.Three
D.Four
- 5.
The physiological response to Estrogen (like tissue growth and differentiation) is primarily a result of:
A.Rapid change in membrane potential
B.Activation of
C.Genomic regulation through the hormone-receptor complex
D.Direct enzymatic breakdown of lipids
- 6.
What happens to the hormone-receptor complex in the action of water-soluble hormones?
A.It enters the nucleus to bind with
B.It remains at the membrane surface to trigger internal signals
C.It is immediately expelled from the cell
D.It is converted into for energy
- 7.
Hormones like Glucagon and Insulin primarily regulate metabolism by:
A.Binding to intracellular receptors
B.Entering the nucleus and changing gene sequence
C.Binding to membrane receptors and triggering second messengers
D.Converting directly into glucose molecules
- 8.
Which of these molecules is hydrophobic and remains within the plasma membrane to activate its target enzyme during the /DAG pathway?
A.Inositol triphosphate ()
B.Diacylglycerol (DAG)
C.Calcium ions
D.Calmodulin
- 9.
A patient has a condition where their cortisol receptors are mutated and cannot bind to DNA. What would be the expected physiological finding?
A.Extremely low levels of cortisol in the blood due to feedback.
B.High levels of cortisol in the blood but symptoms of hormone deficiency.
C.The hormone will act through the cAMP pathway to compensate.
D.The hormone will be converted into testosterone.
- 10.
During the mechanism of action of Epinephrine on heart muscle, what is the 'biochemical response' triggered by PKA?
A.Contraction of the muscle through phosphorylation of troponin-I or calcium channels.
B.Inhibition of all cellular respiration.
C.Synthesis of new actin and myosin filaments through gene expression.
D.Conversion of glucose into starch for long-term storage.
Download the worksheet for Chemical Coordination and Integration - Mechanism of hormone action to practice offline. It includes additional chapter-level practice questions.
Role of hormones as messengers and regulators
SubtopicRole of hormones as messengers and regulators under Chemical Coordination and Integration for Grade 11 CBSE.
Preview questions (no answers)
- 1.
Hormones are characterized as non-nutrient chemicals which act as:
A.Enzymes
B.Intercellular messengers
C.Primary metabolites
D.Structural components
- 2.
Which hormone is known as the emergency hormone because it is secreted during stressful situations?
A.Thyroxine
B.Adrenaline
C.Insulin
D.Glucagon
- 3.
What is the effect of Parathyroid hormone (PTH) on the process of bone resorption (dissolution/demineralization)?
A.It inhibits resorption
B.It stimulates resorption
C.It has no effect
D.It converts bone to cartilage
- 4.
The hormone that inhibits gastric secretion and motility is:
A.Gastrin
B.Secretin
C.Gastric Inhibitory Peptide
D.CCK
- 5.
In the human endocrine system, which part of the pituitary is under direct neural regulation of the hypothalamus?
A.Anterior Pituitary
B.Posterior Pituitary
C.Pars Distalis
D.Adenohypophysis
- 6.
Which hormone is specifically responsible for the stimulation of the synthesis of milk in the mammary glands after childbirth?
A.Oxytocin
B.Prolactin
C.Progesterone
D.Estrogen
- 7.
Hormones like Glucagon and Insulin have opposing effects on blood sugar levels. What is the term used for such a relationship between two hormones?
A.Synergistic
B.Antagonistic
C.Cooperative
D.Permissive
- 8.
Which of the following hormones is synthesized by the hypothalamus but released into the bloodstream at the neurohypophysis?
A.Vasopressin
B.Somatotropin
C.Somatoliberin
D.Prolactin
- 9.
If a person has high levels of and low levels of in their blood, which hormone would be secreted to restore balance?
A.Aldosterone
B.Cortisol
C.ADH
D.ANF
- 10.
Identify the hormone that is produced by the heart and its primary physiological effect.
A.ANF; causes vasodilation to decrease blood pressure.
B.Renin; causes vasoconstriction to increase blood pressure.
C.Erythropoietin; increases the oxygen-carrying capacity of blood.
D.Angiotensin; stimulates the adrenal cortex.
Download the worksheet for Chemical Coordination and Integration - Role of hormones as messengers and regulators to practice offline. It includes additional chapter-level practice questions.
Hypo-and hyperactivity and related disorders
SubtopicHypo-and hyperactivity and related disorders under Chemical Coordination and Integration for Grade 11 CBSE.
Preview questions (no answers)
- 1.
A decrease in the production of which hormone results in a drop in the BMR (Basal Metabolic Rate)?
A.Growth Hormone
B.Thyroxine
C.Adrenaline
D.Glucagon
- 2.
Which of the following is NOT a symptom of Addison's disease?
A.Fatigue
B.Nausea
C.Moon Face
D.Skin bronzing
- 3.
Hyperactivity of which gland is responsible for the 'Fight or Flight' symptoms like increased heart rate and sweating?
A.Adrenal Medulla
B.Adrenal Cortex
C.Thyroid
D.Thymus
- 4.
Grave's disease is basically a form of:
A.Hypothyroidism
B.Hyperthyroidism
C.Hypoparathyroidism
D.Hypopituitarism
- 5.
A patient is diagnosed with a tumor in the parathyroid glands leading to hypersecretion of parathyroid hormone (PTH). Based on the physiological pathway shown in the flowchart, identify the clinical condition '?' that is likely to develop as a result of the metabolic changes in the urinary tract.
A.Renal Calculi
B.Muscle Tetany
C.Simple Goitre
D.Diabetes Mellitus
- 6.
Which of the following describes 'Plummer's disease'?
A.Autoimmune hypothyroidism
B.Hyperthyroidism due to toxic nodular goitre
C.Total pituitary failure
D.Hyposecretion of Mineralocorticoids
- 7.
What is the consequence of hyposecretion of hormones from the Thymus gland in elderly people?
A.Increased blood calcium
B.Weakened immune response
C.High blood sugar
D.Excessive growth
- 8.
A sudden cessation of long-term glucocorticoid therapy (like Prednisone) can lead to an 'Adrenal Crisis'. Why?
A.The endogenous ACTH and cortisol production has been suppressed by the medication
B.The body becomes hypersensitive to even small amounts of natural cortisol
C.The kidneys lose the ability to respond to aldosterone immediately
D.The exogenous hormones have permanently destroyed the adrenal cortex
- 9.
In the condition known as 'Diabetes Insipidus', the 'insipid' nature of the urine refers to it being:
A.Tasteless and dilute due to lack of glucose
B.Sweet-smelling due to ketones
C.Highly concentrated and dark in color
D.Rich in proteins but low in electrolytes
- 10.
Which of the following endocrine disorders is most likely to cause a 're-opening' of the epiphyseal plates if the hormone excess occurs in an adult?
A.None; epiphyseal plates are fused and cannot be re-opened by hormones in adults
B.Acromegaly
C.Hyperparathyroidism
D.Cushing's Syndrome
Download the worksheet for Chemical Coordination and Integration - Hypo-and hyperactivity and related disorders to practice offline. It includes additional chapter-level practice questions.
The hypothalamus
SubtopicThe hypothalamus under Chemical Coordination and Integration for Grade 11 CBSE.
Preview questions (no answers)
- 1.
What is the primary role of the hypothalamus in the endocrine system?
A.To produce digestive enzymes
B.To act as a master controller of the pituitary
C.To pump blood
D.To store waste products
- 2.
The hypothalamus is part of the limbic system and helps regulate:
A.Emotional behavior
B.Vision
C.Hearing
D.Balance
- 3.
Hormones of the hypothalamus are called neurohormones because they are secreted by:
A.Glial cells
B.Axon terminals of neurons
C.Dendrites
D.Blood vessels
- 4.
Which of the following is an example of a releasing hormone?
A.Somatostatin
B.GnRH
C.Insulin
D.Glucagon
- 5.
The hypothalamus regulates the secretion of Growth Hormone () from the pituitary gland using a dual control mechanism. Refer to the regulatory flowchart below. If 'Hormone A' stimulates the release of while 'Hormone B' inhibits its release, which of the following correctly identifies these hypothalamic hormones?
A.A: ; B: Somatostatin
B.A: Somatostatin; B:
C.A: ; B: Prolactin-inhibiting hormone
D.A: ; B:
- 6.
In the hypophyseal portal system, neurohormones are transported from the hypothalamus to the anterior pituitary. Based on the provided diagram of this vascular link, identify the specific region where these hypothalamic hormones leave the bloodstream to reach their target secretory cells in the adenohypophysis.
A.Primary capillary plexus located in the median eminence
B.Secondary capillary plexus located in the pars distalis
C.Axon terminals located in the pars nervosa
D.Superior hypophyseal artery before entering the stalk
- 7.
Which connection is characterized by the absence of a direct blood supply from the hypothalamus to the gland?
A.Hypothalamus and Anterior Pituitary
B.Hypothalamus and Posterior Pituitary
C.Hypothalamus and Thyroid
D.Hypothalamus and Pancreas
- 8.
Which of the following defines the 'ultra-short loop' feedback?
A.The hypothalamic hormone inhibiting its own secretion
B.The pituitary hormone inhibiting the hypothalamus
C.The target gland hormone inhibiting the pituitary
D.The hypothalamic hormone acting directly on the target gland
- 9.
The term 'Neurohormone' is most appropriately used for hypothalamic secretions because:
A.They are secreted by neurons into the blood
B.They act only on the nervous system
C.They are neurotransmitters used at synapses
D.They are produced by glial cells
- 10.
Which hypothalamic nucleus is involved in the 'Heat Loss' mechanism (e.g., sweating)?
A.Anterior hypothalamic nucleus
B.Posterior hypothalamic nucleus
C.Lateral hypothalamic nucleus
D.Ventromedial nucleus
Download the worksheet for Chemical Coordination and Integration - The hypothalamus to practice offline. It includes additional chapter-level practice questions.
Thymus
SubtopicThymus under Chemical Coordination and Integration for Grade 11 CBSE.
Preview questions (no answers)
- 1.
The thymus is located on the ____ side of the aorta.
A.Lateral
B.Ventral
C.Dorsal
D.Anterior
- 2.
Cell-mediated immunity and humoral immunity are both influenced by:
A.Thyroxine
B.Thymosin
C.Epinephrine
D.Melatonin
- 3.
At which stage of life is the thymus gland at its maximum proportional size?
A.Birth
B.Old age
C.Puberty
D.Adulthood
- 4.
The thymus gland belongs to which of the following systems?
A.Endocrine system
B.Immune system
C.Both A and B
D.Excretory system
- 5.
The provided flowchart illustrates the endocrine and immunological functions of the thymus gland. Based on your knowledge of chemical coordination, identify the correct chemical classification of 'Factor X' and the specific category of immune response represented by 'Immunity Y'.
A.Factor X is a peptide hormone; Immunity Y is humoral immunity
B.Factor X is a steroid hormone; Immunity Y is cell-mediated immunity
C.Factor X is a peptide hormone; Immunity Y is innate immunity
D.Factor X is an amine hormone; Immunity Y is passive immunity
- 6.
Select the correct combination regarding the thymus gland.
A.Location: Dorsal to aorta; Hormone: Thyroxine
B.Location: Ventral to aorta; Hormone: Thymosin
C.Location: Behind sternum; Hormone: Glucagon
D.Location: Neck region; Hormone: Thymosin
- 7.
What is the result of thymus atrophy on the production of antibodies?
A.Antibody production increases significantly
B.Antibody production is often reduced because B-cells lack T-cell support
C.Antibody production remains completely unaffected
D.Antibody production becomes toxic to the body
- 8.
Which of the following would NOT be affected by a lack of thymosins?
A.The differentiation of T-lymphocytes.
B.The body's ability to mount a cell-mediated immune response.
C.The production of antibodies by B-cells (humoral immunity).
D.The regulation of basal metabolic rate (BMR).
- 9.
The primary role of the thymus in cell-mediated immunity is to:
A.Produce antigens for the body to fight.
B.Ensure that T-cells are functional and 'educated' to recognize foreign invaders.
C.Directly produce the plasma cells that secrete antibodies.
D.Store memory B-cells for long-term protection.
- 10.
What is the biochemical fate of the thymus in an average 80-year-old human?
A.It has transformed into a major site of hormone production for growth.
B.It is largely replaced by connective and adipose tissue with minimal thymosin secretion.
C.It has migrated to the neck to fuse with the thyroid.
D.It has doubled in size to compensate for overall body aging.
Download the worksheet for Chemical Coordination and Integration - Thymus to practice offline. It includes additional chapter-level practice questions.
Hormones of heart, kidney and gastrointestinal tract
SubtopicHormones of heart, kidney and gastrointestinal tract under Chemical Coordination and Integration for Grade 11 CBSE.
Preview questions (no answers)
- 1.
Growth factors are essential for:
A.Only digestion
B.Only blood pressure regulation
C.Normal growth of tissues and repair
D.Only RBC formation
- 2.
Which hormone is produced by the wall of the heart's upper chambers?
A.Gastrin
B.ANF
C.Secretin
D.CCK
- 3.
Which hormone has an inhibitory effect on gastric glands?
A.Gastrin
B.Secretin
C.GIP
D.Erythropoietin
- 4.
Juxtaglomerular cells are part of which organ system?
A.Circulatory system
B.Digestive system
C.Excretory system
D.Respiratory system
- 5.
The provided flowchart illustrates the hormonal control of digestive secretions by the duodenal mucosa. Identify hormones 'A' and 'B' based on their target organs and physiological effects.
A.A: Secretin, B: Cholecystokinin
B.A: Cholecystokinin, B: Secretin
C.A: Gastrin, B: Cholecystokinin
D.A: Cholecystokinin, B: Gastric Inhibitory Peptide
- 6.
Which statement is correct about gastrointestinal hormones?
A.They are steroid in nature
B.They are secreted by the exocrine glands of the GI tract
C.They help in the regulation of digestive juices
D.They are only secreted when the stomach is empty
- 7.
Which hormone is involved in the long-term adaptation to high altitudes by increasing RBC production?
A.ANF
B.Erythropoietin
C.Secretin
D.CCK
- 8.
Which of the following hormones is NOT produced by the gastrointestinal tract?
A.Gastrin
B.Secretin
C.Erythropoietin
D.Cholecystokinin
- 9.
What is the primary effect of ANF on the JGA (Juxtaglomerular Apparatus)?
A.It stimulates the JGA to release more Renin
B.It inhibits the release of Renin
C.It causes hypertrophy of the JG cells
D.It has no effect on the JGA
- 10.
Which hormone is structurally similar to Gastrin and can bind to the same receptors (CCK-B receptors)?
A.Secretin
B.Cholecystokinin (CCK)
C.GIP
D.Motilin
Download the worksheet for Chemical Coordination and Integration - Hormones of heart, kidney and gastrointestinal tract to practice offline. It includes additional chapter-level practice questions.