Description : Secretion of somatotrophin is promoted by (A) Somatomedin C (B) Somatostatin (C) Growth hormone releasing hormone (D) Hypoglycaemia
Last Answer : Answer : C
Description : Secretion of Insulin-like Growth Factor-I is promoted by (A) Insulin (B) Glucagon (C) Growth hormone (D) Somatomedin C
Description : Regulation of ACTH secretion occurs through (A) Corticotropin releasing hormone (CRH) and corticotropin release inhibiting hormone (CRIH) of hypothalamus (B) Feedback inhibition by cortisol (C) CRH and feedback inhibition by cortisol (D) CRIH and feedback inhibition by cortisol
Description : Secretion of prolactin is regulated by (A) Feedback inhibition (B) Prolactin releasing hormone (C) Prolactin release inhibiting hormone (D) All of these
Description : In males, secretion of luteinising hormone is inhibited by (A) Gonadotropin releasing hormone (B) FSH (C) High blood level of testosterone (D) Inhibin
Description : All the following statements about thyrotropin releasing hormone are true except (A) It is secreted by hypothalamus (B) It is a pentapeptide (C) It increases the secretion of TSH (D) Its secretion is inhibited by high level of T3 and T4 in blood
Last Answer : Answer : B
Description : Growth hormone is released by (A) Somatostatin (B) Growth hormone releasing hormone (C) Prolactin release inhibiting hormone (D) Luteinizing releasing hormone
Description : Down regulation is (A) Increased destruction of a hormone (B) Feed back inhibition of hormone secretion (C) Decreased concentration of a hormone in blood (D) Decrease in number of receptors for a hormone
Last Answer : Answer : D
Description : Secretion of MSH is regulated by (A) Feedback mechanism (B) Melatonin (C) Hypothalamic hormones (D) ACTH HORMONE METABOLISM 217
Description : 3- Somatostatin inhibits the release of: A. Growth hormone B. Insulin C. Thyrotropin D. All of the above
Last Answer : 3- Somatostatin inhibits the release of: A. Growth hormone B. Insulin C. Thyrotropin D. All of the above
Description : 16.8 Drugs that suppress growth hormone release in acromegaly include the following except: A. Bromocriptine B. Somatostatin C. Octreotide D. Nafarelin
Last Answer : D. Nafarelin
Description : 16.6 Somatostatin inhibits the release of: A. Growth hormone B. Insulin C. Thyrotropin D. All of the above
Last Answer : D. All of the above
Description : 16.5 Octreotide is a long acting synthetic analogue of: A. Prolactin B. Growth hormone C. Somatostatin D. Gonadotropin releasing hormone
Description : 6.4 Several actions of growth hormone are exerted through the elaboration of: A. Cyclic AMP B. Cyclic GMP C. Somatostatin D. Insulin like growth factor-1
Last Answer : D. Insulin like growth factor-1
Description : Potassium metabolism is regulated by the hormone: (A) Aldosterone (B) PTH (C) Somatostatin (D) Estrogen
Last Answer : Answer : A
Description : The metabolism of sodium is regulated by the hormone: (A) Insulin (B) Aldosterone (C) PTH (D) Somatostatin
Description : Which of one of the following is released by hypothalamus? (A) Somatostatin (B) Somatotropic hormone (C) Somato medin C (D) Luteinising hormone
Description : Secretion of androgens is increased by (A) LH (B) FSH (C) ACTH (D) Growth hormone
Description : Decreased secretion of growth hormone during childhood causes (A) Simmond’s disease (B) Cushing’s disease (C) Dwarfism (D) Cretinism
Description : The secretion of insulin is stimulated by: a. adrenaline b. somatostatin c. fatty acids d. acetylcholine
Last Answer : fatty acids
Description : Which one of the following pairs is incorrectly matched? (a) Glucagon – Beta cells (source) (b) Somatostatin – Delta cells (source) (c) Corpus luteum – Relaxin (secretion) (d) Insulin – Diabetes mellitus (disease
Last Answer : (a) Glucagon – Beta cells (source)
Description : If for some reason our goblet cells are non- functional, this will adversely affect (a) production of somatostatin (b) secretion of sebum from the sebaceous glands (c) maturation of sperms (d) smooth movement of food down the intestine.
Last Answer : (d) smooth movement of food down the intestine.
Description : An example of feedback inhibition is (A) Allosteric inhibition of hexokinase by glucose6-phosphate (B) Cyanide action on cytochrome (C) Sulpha drug on folic acid synthesizer bacteria (D) Reaction between succinic dehydrogenase and succinic acid
Description : Feedback inhibition of enzyme is influenced by (A) Enzyme (B) External factors (C) End product (D) Substrate
Description : Enzyme inhibition caused by a substance resembling substrate molecule is (A) Competitive inhibition (B) Non-competitive inhibition (C) Feedback inhibition (D) Allosteric inhibition
Description : Feedback inhibition of enzyme action is affected by (A) Enzyme (B) Substrate (C) End products (D) None of these
Description : The inhibition of succinate dehydrogenase by malonate by (A) Competitive inhibition (B) Non-competitive inhibition (C) Uncompetitive inhibition (D) Feedback inhibition
Description : Allosteric enzymes regulate the formation of products by (A) Feedback inhibition (B) Non-competitive inhibition (C) Competitive inhibition (D) Repression-derepression
Description : Allosteric inhibition is also known as (A) Competitive inhibition (B) Non-competitive inhibition (C) Feedback inhibition (D) None of these
Description : One of the important functions of prostacyclins is (A) Inhibition of platelet aggregation (B) Contraction of uterus (C) Decrease of gastric secretion (D) Relieving osthma
Description : Secretin causes all of the following except (A) Secretion of pancreatic juice (B) Secretion of bile (C) Inhibition of gastric secretion (D) Stimulation of intestinal motility
Description : Inhibition of thromboxane synthesis by aspirin in platelets lasts for 5-7 days because: A. Aspirin persists in the body for 5-7 days B. Aspirin induced depletion of arachidonic acid lasts 5-7 ... 5-7 days D. Platelets cannot generate fresh thromboxane synthetase and their turnover time is 5-7 days
Last Answer : D. Platelets cannot generate fresh thromboxane synthetase and their turnover time is 5-7 days
Description : The hormone somatostatin is resposible for inhibiting the motility and absobtion in the digestive tract. It also inhibits the release of insuline and
Last Answer : The hormone somatostatin is resposible for inhibiting the motility and absobtion in the digestive tract. It also ... Alph B. Beta C. Delta D. F cells
Description : Secretion of glucocorticoida is regulated by all the following except (A) Hypothalamus (B) Anterior pituitary (C) Feedback control by blood glucose (D) Feedback control by glucocorticoids
Description : Secretion of PTH is regulated by (A) Hypothalamus (B) Anterior pituitary (C) Feedback effect of plasma PTH (D) Feedback effect of plasma calcium
Description : Secretion of thyroid hormones is regulated by (A) Hypothalamus (B) Anterior pituitary (C) Feedback regulation (D) All of these 220 MCQs IN BIOCHEMISTRY
Description : Melatonin: a. is secreted by pineal body b. secretion is highest at night c. secretion is inhibited by light d. all above
Last Answer : all above
Description : Prolactin secretion: a. is higher in female than male b. is inhibited by dopamine c. is increased in patients taking phenothiazines d. all above
Description : Insulin secretion: a. is inhibited by atropine b. is increased by vagal stimulation c. is inhibited by amino acids d. is stimulated by beta agonists
Last Answer : is increased by vagal stimulation
Description : Which statement is NOT correct about PTH? A) When calcium level rises, PTH secretion is inhibited. B) When calcium level lowers, PTH secretion is stimulated. C) PTH has the opposite effect of ... . D) PTH stimulates calcium absorption from the gut. E) PTH decreases the activity of osteoclasts.
Last Answer : E) PTH decreases the activity of osteoclasts.
Description : The blood sugar raising action of the hormone of suprarenal cortex is due to (A) Glyconeogenesis (B) Glycogenolysis (C) Glucagon like activity (D) due to inhibition of glomerular filtration of glucose
Description : Antidiuretic hormone (ADH) - (1) inhibits the secretion of growth hormone by the pituitary (2) inhibits the rate of heart beat (3) causes the muscular walls of the arterioles to contract that simulates the reabsorption of water from the kidney tubules (4) causes an increase in the blood pressure
Last Answer : (3) causes the muscular walls of the arterioles to contract that simulates the reabsorption of water from the kidney tubules
Description : Given below is an incomplete table on hormones, their source glands and one major effect of each human body. Identify the option representing correct grouping of hormone its gland and ... hormone (b) Placenta Insulin Vasopressin (c) Ovary Insulin Calcitonin (d) Placenta Glucagon Calcitonin
Last Answer : (a) Ovary Glucagon Growth hormone
Description : A pregnant female delivers a baby who suffers from stunted growth, mental retardation, low intelligence quotient and abnormal skin. This is the result of (a) cancer of the thyroid gland (b) oversecretion of pars distalis (c) deficiency of iodine in diet (d) low secretion of growth hormone
Last Answer : (c) deficiency of iodine in diet
Description : .Gene regulation governing lactose operon of E.coli that involves the lac I gene product is (a) negative and repressible because repressor protein prevents transcription (b) feedback inhibition ... be induced by lactose (d) negative and inducible because repressor protein prevents transcription.
Last Answer : (d) negative and inducible because repressor protein prevents transcription.
Description : Gene regulation governing lactose operon of E.coli that involves the lac I gene product is (a) negative and repressible because repressor protein prevents transcription (b) feedback inhibition ... be induced by lactose (d) negative and inducible because repressor protein prevents transcription.
Description : Which factor is responsible for inhibition of enzymatic process during feedback? (a) Substrate (b) Enzymes (c) End product (d) Temperature
Last Answer : (c) End product
Description : The sulfa drugs work by _______ with PABA in making folic acid. a. Positive Feedback b. Negative Feedback c. Competitive Inhibition d. Allosteric Inhibition
Last Answer : c. Competitive Inhibition
Description : What is it called when an enzyme is blocked at its active site so the normal substrate can't bind? a. Competitive Inhibition b. Feedback Inhibition c. Noncompetitive Inhibition d. Pathway Modulation
Last Answer : a. Competitive Inhibition
Description : The ability of CTP to bind to aspartate carbamoyltransferase and shut down the synthesis of more A- enzyme induction B- enzyme repression C- feedback inhibition of enzyme activity D- none of these
Last Answer : feedback inhibition of enzyme activity