A high concentration of PTH in blood causes (A) Increase in plasma calcium and inorganic phosphorous (B) Decrease in plasma calcium and inorganic phosphorous (C) Increase in plasma calcium and decrease in plasma inorganic phosphorous (D) Decrease in plasma calcium and increase in plasma inorganic phosphorous

A high concentration of PTH in blood causes (A) Increase in plasma calcium and inorganic phosphorous (B) Decrease in plasma calcium and inorganic phosphorous (C) Increase in plasma calcium and decrease in plasma inorganic phosphorous (D) Decrease in plasma calcium and increase in plasma inorganic phosphorous
by

1 Answer

Answer :

Answer :  C
by
selected

Related questions

In hypoparathyroidism (A) Plasma calcium and inorganic phosphorous are low (B) Plasma calcium and inorganic phosphorous are high (C) Plasma calcium is low and inorganic phosphorous high (D) Plasma calcium is high and inorganic phosphorous low

Description : In hypoparathyroidism (A) Plasma calcium and inorganic phosphorous are low (B) Plasma calcium and inorganic phosphorous are high (C) Plasma calcium is low and inorganic phosphorous high (D) Plasma calcium is high and inorganic phosphorous low

Last Answer : Answer : C

The product of serum calcium concentration (mg/dl) and serum inorganic phosphorous concentration (mg/dl) is decreased in (A) Rickets (B) Hypoparathyroidism (C) Hyperparathyroidism (D) Renal failure

Description : The product of serum calcium concentration (mg/dl) and serum inorganic phosphorous concentration (mg/dl) is decreased in (A) Rickets (B) Hypoparathyroidism (C) Hyperparathyroidism (D) Renal failure

Last Answer : Answer : A

The product of serum calcium concentration (mg/dl) and serum inorganic phosphorous concentration (mg/dl) in children is about (A) 30 (B) 40 (C) 50 (D) 60

Description : The product of serum calcium concentration (mg/dl) and serum inorganic phosphorous concentration (mg/dl) in children is about (A) 30 (B) 40 (C) 50 (D) 60

Last Answer : Answer : C

The product of serum calcium concentration (mg/dl) and serum inorganic phosphorous concentration (mg/dl) in adults is about (A) 30 (B) 40 (C) 50 (D) 60

Description : The product of serum calcium concentration (mg/dl) and serum inorganic phosphorous concentration (mg/dl) in adults is about (A) 30 (B) 40 (C) 50 (D) 60

Last Answer : Answer : A

Calcitonin causes (A) Calcinuria and phosphaturia (B) Decrease in urinary calcium (C) Decrease in urinary phosphorous (D) Increase in blood calcium level 212 MCQs IN BIOCHEMISTRY

Description : Calcitonin causes (A) Calcinuria and phosphaturia (B) Decrease in urinary calcium (C) Decrease in urinary phosphorous (D) Increase in blood calcium level 212 MCQs IN BIOCHEMISTRY

Last Answer : Answer : A

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 PTH is regulated by (A) Hypothalamus (B) Anterior pituitary (C) Feedback effect of plasma PTH (D) Feedback effect of plasma calcium

Last Answer : Answer : D

The correct statement about serum inorganic phosphorous concentration is (A) It is higher in men than in women (B) It is higher in women than in men (C) It is higher in adults than in children (D) It is higher in children than in adults

Description : The correct statement about serum inorganic phosphorous concentration is (A) It is higher in men than in women (B) It is higher in women than in men (C) It is higher in adults than in children (D) It is higher in children than in adults

Last Answer : Answer : D

PTH causes all of the following except (A) Increased intestinal absorption of calcium (B) Increased intestinal absorption of phosphate (C) Increased tubular reabsorption of calcium (D) Increased tubular reabsorption of phosphate

Description : PTH causes all of the following except (A) Increased intestinal absorption of calcium (B) Increased intestinal absorption of phosphate (C) Increased tubular reabsorption of calcium (D) Increased tubular reabsorption of phosphate

Last Answer : Answer : D

PTH (A) Reduces the renal clearance or excretion of calcium (B) Increases renal phosphate clearance (C) Increases the renal clearance of calcium (D) Decreases the renal phosphate clearance

Description : PTH (A) Reduces the renal clearance or excretion of calcium (B) Increases renal phosphate clearance (C) Increases the renal clearance of calcium (D) Decreases the renal phosphate clearance

Last Answer : Answer : A

High amount of sulphur and phosphorous in coke causes (A) Decrease in its calorific value (B) Increase in its strength(C) Brittleness of steel made by using it(D) None of these

Description : High amount of sulphur and phosphorous in coke causes (A) Decrease in its calorific value (B) Increase in its strength (C) Brittleness of steel made by using it (D) None of these

Last Answer : (C) Brittleness of steel made by using it

The normal serum inorganic phosphorous level is (A) 1.5–2.5 mg/100 ml (B) 2.5–4.5 mg/100 ml (C) 4.5–6.5 mg/100 ml (D) 0.5–1.5 mg/100 ml

Description : The normal serum inorganic phosphorous level is (A) 1.5–2.5 mg/100 ml (B) 2.5–4.5 mg/100 ml (C) 4.5–6.5 mg/100 ml (D) 0.5–1.5 mg/100 ml

Last Answer : Answer : B

Serum inorganic phosphorous decreases in all the following conditions except (A) Hyperparathyroidism (B) Intestinal malabsorption (C) Osteomalacia (D) Chronic renal failure

Description : Serum inorganic phosphorous decreases in all the following conditions except (A) Hyperparathyroidism (B) Intestinal malabsorption (C) Osteomalacia (D) Chronic renal failure

Last Answer : Answer : D

Serum inorganic phosphorous rises in all the following conditions except (A) Hypoparathyroidism (B) Hypervitaminosis D (C) Chronic renal failure (D) After a carbohydrate-rich meal MINERAL METABOLISM 197

Description : Serum inorganic phosphorous rises in all the following conditions except (A) Hypoparathyroidism (B) Hypervitaminosis D (C) Chronic renal failure (D) After a carbohydrate-rich meal MINERAL METABOLISM 197

Last Answer : Answer : D

When ATP forms AMP (A) Inorganic pyrophosphate is produced (B) Inorganic phosphorous is produced (C) Phsophagen is produced (D) No energy is produced

Description : When ATP forms AMP (A) Inorganic pyrophosphate is produced (B) Inorganic phosphorous is produced (C) Phsophagen is produced (D) No energy is produced

Last Answer : Answer : A

A 55 year-old female complaining of vague tiredness is found to have a serum corrected calcium concentration of 2.9 mmol/l. Examination was unremarkable. Which of the following results confirms the suspected diagnosis of primary hyperparathyroidism? 1) High normal 1,25-dihydroxyvitamin D concentration 2) High normal 24 hour urinary calcium concentration 3) High normal plasma parathyroid hormone concentration 4) Low normal plasma phosphate concentration 5) Low normal serum 25-hydroxyvitamin D concentration

Description : A 55 year-old female complaining of vague tiredness is found to have a serum corrected calcium concentration of 2.9 mmol/l. Examination was unremarkable. Which of the following results ... 4) Low normal plasma phosphate concentration 5) Low normal serum 25-hydroxyvitamin D concentration

Last Answer : Answers-3 Bit too easy really. A high or even normal PTH concentration in the presence of hypercalcaemia would support the diagnosis of hyperparathyroidism. A high urinary Calcium concentration may ... but neither confirm the diagnosis. Elevated 1,25 VitD suggests a diagnosis of hypervitaminosis D.

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 calcitonin. D) PTH stimulates calcium absorption from the gut. E) PTH decreases the activity of osteoclasts.

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.

The characteristic of hyperparathyroidism is (A) Low serum calcium (B) High serum phosphorous (C) Low serum calcium and high serum phosphorous (D) High serum calcium and low serum phosphate

Description : The characteristic of hyperparathyroidism is (A) Low serum calcium (B) High serum phosphorous (C) Low serum calcium and high serum phosphorous (D) High serum calcium and low serum phosphate

Last Answer : Answer : D

Absorption of phosphorous from diet is favoured by (A) Moderate amount of fat (B) Acidic environment (C) High calcium content (D) High phytic acid

Description : Absorption of phosphorous from diet is favoured by (A) Moderate amount of fat (B) Acidic environment (C) High calcium content (D) High phytic acid

Last Answer : Answer : B

An acquired siderosis-Bantu siderosis is due to (A) Foods cooked in iron pots (B) Diet high in phosphorous (C) Diet high in calcium (D) High fat diet

Description : An acquired siderosis-Bantu siderosis is due to (A) Foods cooked in iron pots (B) Diet high in phosphorous (C) Diet high in calcium (D) High fat diet

Last Answer : Answer : A

(2) Nitrogen, Phosphorous and Sodium Explanation: Fertilizer (or fertiliser) is any organic or inorganic material of natural or synthetic origin (other than liming materials) that is added to a soil to supply one or more plant nutrients essential to the growth of plants. The three elements most needed in common fertilisers are Nitrogen.

Description : (2) Nitrogen, Phosphorous and Sodium Explanation: Fertilizer (or fertiliser) is any organic or inorganic material of natural or synthetic origin (other than liming materials) that is added to a ... essential to the growth of plants. The three elements most needed in common fertilisers are Nitrogen.

Last Answer : Metal are good conductors, because – (1) they contain free electrons (2) the molecules in them are very close to each other (3) the molecules in them collide very freely (4) they contain reflecting surface

Renal ricket is caused by renal tubular defect (usually inherited) which interferes with reabsorption of (A) Calcium (B) Phosphorous (C) Sodium (D) Chloride

Description : Renal ricket is caused by renal tubular defect (usually inherited) which interferes with reabsorption of (A) Calcium (B) Phosphorous (C) Sodium (D) Chloride

Last Answer : Answer : B

Milk is a good source of all of the following except (A) Essential amino acids (B) Vitamin C (C) Galactose (D) Calcium and phosphorous

Description : Milk is a good source of all of the following except (A) Essential amino acids (B) Vitamin C (C) Galactose (D) Calcium and phosphorous

Last Answer : Answer : B

Levels of serum calcium and inorganic phosphorus are increased in (A) Hypervitaminosis D (B) Hypoparathyroidism (C) Hypovitaminosis D (D) None of these

Description : Levels of serum calcium and inorganic phosphorus are increased in (A) Hypervitaminosis D (B) Hypoparathyroidism (C) Hypovitaminosis D (D) None of these

Last Answer : Answer : A

Role of an enzyme in reactions is to/as (a) decrease activation energy (b) increase activation energy (c) inorganic catalyst (d) none of the above.

Description : Role of an enzyme in reactions is to/as (a) decrease activation energy (b) increase activation energy (c) inorganic catalyst (d) none of the above.

Last Answer : (a) decrease activation energy

The primary event in respiratory alkalosis is (A) Rise in pH (B) Decrease in pCO2 (C) Increase in plasma bicarbonate (D) Decrease in plasma chloride

Description : The primary event in respiratory alkalosis is (A) Rise in pH (B) Decrease in pCO2 (C) Increase in plasma bicarbonate (D) Decrease in plasma chloride

Last Answer : Answer : B

The initial event in respiratory acidosis is (A) Decrease in pH (B) Increase in pCO2 (C) Increase in plasma bicarbonate (D) Decrease in plasma bicarbonate

Description : The initial event in respiratory acidosis is (A) Decrease in pH (B) Increase in pCO2 (C) Increase in plasma bicarbonate (D) Decrease in plasma bicarbonate

Last Answer : Answer : B

All the following statements regarding calcium are correct except (A) It diffuses as a divalent cation (B) It freely diffuses across the endoplasmic reticulum of muscle cells (C) It can exist in the blood as ionic form and also protein bound (D) It is found in high concentration in bones

Description : All the following statements regarding calcium are correct except (A) It diffuses as a divalent cation (B) It freely diffuses across the endoplasmic reticulum of muscle cells (C) It can exist in the blood as ionic form and also protein bound (D) It is found in high concentration in bones

Last Answer : Answer : B

Potassium metabolism is regulated by the hormone: (A) Aldosterone (B) PTH (C) Somatostatin (D) Estrogen

Description : Potassium metabolism is regulated by the hormone: (A) Aldosterone (B) PTH (C) Somatostatin (D) Estrogen

Last Answer : Answer : A

The metabolism of sodium is regulated by the hormone: (A) Insulin (B) Aldosterone (C) PTH (D) Somatostatin

Description : The metabolism of sodium is regulated by the hormone: (A) Insulin (B) Aldosterone (C) PTH (D) Somatostatin

Last Answer : Answer : B

The second messenger for PTH is (A) Cyclic AMP (B) Cyclic GMP (C) Diacylglycerol (D) Inositol triphosphate

Description : The second messenger for PTH is (A) Cyclic AMP (B) Cyclic GMP (C) Diacylglycerol (D) Inositol triphosphate

Last Answer : Answer : A

Half-life of PTH is (A) A few seconds (B) A few minutes (C) A few hours (D) A few days

Description : Half-life of PTH is (A) A few seconds (B) A few minutes (C) A few hours (D) A few days

Last Answer : Answer : B

Amino acid residues which are essential for the biological activity of PTH are (A) N-terminal 34 amino acids (B) N-terminal 50 amino acids (C) C-terminal 34 amino acids (D) C-terminal 50 amino acids

Description : Amino acid residues which are essential for the biological activity of PTH are (A) N-terminal 34 amino acids (B) N-terminal 50 amino acids (C) C-terminal 34 amino acids (D) C-terminal 50 amino acids

Last Answer : Answer : A

The number of amino acid residues in PTH: (A) 51 (B) 84 (C) 90 (D) 115

Description : The number of amino acid residues in PTH: (A) 51 (B) 84 (C) 90 (D) 115

Last Answer : Answer : B

Parathyroid hormone (PTH) is synthesised in (A) Chief cells of parathyroid glands (B) Oxyphil cells of parathyroid glands (C) Para follicular cells of thyroid glands (D) Follicular cells of thyroid gland

Description : Parathyroid hormone (PTH) is synthesised in (A) Chief cells of parathyroid glands (B) Oxyphil cells of parathyroid glands (C) Para follicular cells of thyroid glands (D) Follicular cells of thyroid gland

Last Answer : Answer : A

Iodine is the constituent of (A) T3 and T4 (B) PTH (C) Insulin (D) Adrenaline

Description : Iodine is the constituent of (A) T3 and T4 (B) PTH (C) Insulin (D) Adrenaline

Last Answer : Answer : A

A striking feature of living cells is a marked difference between the composition of the cytosol and the extracellular milieu. Which of the following statement(s) concerning the mechanisms of maintenance of these differences is/are true? a. The cell membrane is able to maintain a 10,000 fold gradient between the extracellular concentration of ionized calcium and the intracellular concentration b. The key to these differences is the fact that the plasma membrane is normally impermeable to sodium, potassium and calcium c. The selectivity of biologic membranes is highly consistent and seldom changes d. The selectivity of cell membranes relates only to ions and not organic compounds

Description : A striking feature of living cells is a marked difference between the composition of the cytosol and the extracellular milieu. Which of the following statement(s) concerning the mechanisms of maintenance ... d. The selectivity of cell membranes relates only to ions and not organic compounds

Last Answer : Answer: a The survival of the cell requires that cytosolic composition be maintained within narrow limits, despite the constant influx of nutrients and the simultaneous outflow of waste. A ... be altered drastically as a result of regulatory or signaling processes that occur within the cell

Aldosterone secretion is controlled by: a. plasma sodium concentration b. plasma calcium concentration c. plasma potassium concentration d. angiotensin II

Description : Aldosterone secretion is controlled by: a. plasma sodium concentration b. plasma calcium concentration c. plasma potassium concentration d. angiotensin II

Last Answer : angiotensin II

The following are true about calcium regulating hormones: a. calcitonin increases the plasma calcium concentration b. vitamin D is produced in the skin c. vitamin D is metabolized to its active form in the liver and kidney. d. vitamin D increases calcium absorption from the gut

Description : The following are true about calcium regulating hormones: a. calcitonin increases the plasma calcium concentration b. vitamin D is produced in the skin c. vitamin D is metabolized to its active form in the liver and kidney. d. vitamin D increases calcium absorption from the gut

Last Answer : vitamin D increases calcium absorption from the gut

A decrease in the ionized fraction of serum calcium causes (A) Tetany (B) Rickets (C) Osteomalacia (D) Osteoporosis

Description : A decrease in the ionized fraction of serum calcium causes (A) Tetany (B) Rickets (C) Osteomalacia (D) Osteoporosis

Last Answer : Answer : A

The transport of proteins out of the cell is termed exocytosis. Which of the following statement(s) is/are true concerning this process? a. Secretory vesicles fuse with the plasma membrane b. The process can occur in either a constitutive or regulated process c. A regulated secretion is triggered by a stimulus, most likely a hormone or a neurotransmitter d. A decrease in cytoplasmic calcium occurs as part of the secretion process

Description : The transport of proteins out of the cell is termed exocytosis. Which of the following statement(s) is/are true concerning this process? a. Secretory vesicles fuse with the plasma membrane b. ... or a neurotransmitter d. A decrease in cytoplasmic calcium occurs as part of the secretion process

Last Answer : Answer: a, b, c Transport vesicles that bud off the Golgi network carry both material to be secreted from the cell and protein destined to become components of the plasma ... but may also involve generation of diacylglycerol or production of cyclic AMP which activate kinases or phosphatases

An increase in carbohydrate metabolism is accompanied by temporary decrease in serum: (A) Calcium (B) Phosphate (C) Iron (D) Sodium

Description : An increase in carbohydrate metabolism is accompanied by temporary decrease in serum: (A) Calcium (B) Phosphate (C) Iron (D) Sodium

Last Answer : Answer : B

Hyperventilation: a. decreases cerebral blood flow b. increases ionized calcium concentration in the serum c. causes hypocapnia d. causes metabolic alkalosis

Description : Hyperventilation: a. decreases cerebral blood flow b. increases ionized calcium concentration in the serum c. causes hypocapnia d. causes metabolic alkalosis

Last Answer : causes hypocapnia

The following is true of heparin except: A. Sudden stoppage of continuous heparin therapy causes rebound increase in blood coagulability B. High doses of heparin inhibit platelet aggregation C. Heparin is the physiologically active circulating anticoagulant D. Heparin clears lipemic plasma in vivo but not in vitro

Description : The following is true of heparin except: A. Sudden stoppage of continuous heparin therapy causes rebound increase in blood coagulability B. High doses of heparin inhibit platelet aggregation ... active circulating anticoagulant D. Heparin clears lipemic plasma in vivo but not in vitro

Last Answer : C. Heparin is the physiologically active circulating anticoagulant

An inherited or acquired renal tubular defect in the reabsorption of phosphate (Vit D resistant ricket) is characterized with (A) Normal serum Phosphate (B) High serum phosphate (C) A low blood phosphorous with elevated alkaline Phosphate (D) A high blood phosphorous with decreased alkaline phosphatase

Description : An inherited or acquired renal tubular defect in the reabsorption of phosphate (Vit D resistant ricket) is characterized with (A) Normal serum Phosphate (B) High serum phosphate (C ... blood phosphorous with elevated alkaline Phosphate (D) A high blood phosphorous with decreased alkaline phosphatase

Last Answer : Answer : C

Of the following highest concentration of calcium is seen in (A) Blood (B) CSF (C) Muscle (D) Nerve

Description : Of the following highest concentration of calcium is seen in (A) Blood (B) CSF (C) Muscle (D) Nerve

Last Answer : Answer : C

Deficiency of urea cycle enzymes results into accumulation of citrulline argininosuccinate arginine in the liver resulting in increasing concentration of …….. in the blood. (A) Calcium (B) Sodium (C) Ammonia (D) Lipid

Description : Deficiency of urea cycle enzymes results into accumulation of citrulline argininosuccinate arginine in the liver resulting in increasing concentration of …….. in the blood. (A) Calcium (B) Sodium (C) Ammonia (D) Lipid

Last Answer : Answer : C

A high plasma calcium level decreases intestinal absorption of calcium by (A) Stimulating the secretion of parathormone (B) Inhibiting the secretion of parathormone (C) Decreasing the synthesis of cholecalciferol (D) Inhibiting the secretion of thyrocalcitonin

Description : A high plasma calcium level decreases intestinal absorption of calcium by (A) Stimulating the secretion of parathormone (B) Inhibiting the secretion of parathormone (C) Decreasing the synthesis of cholecalciferol (D) Inhibiting the secretion of thyrocalcitonin

Last Answer : Answer : B

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

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

Presence of high concentration of ozone and smog in atmospheric air causes the(A) Embrittlement & decrease of folding resistance of paper(B) Cracking of rubber products(C) Fading of dye on textiles(D) Damage of electrical insulator on high tension power line

Description : Presence of high concentration of ozone and smog in atmospheric air causes the (A) Embrittlement & decrease of folding resistance of paper (B) Cracking of rubber products (C) Fading of dye on textiles (D) Damage of electrical insulator on high tension power line

Last Answer : (B) Cracking of rubber products