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MTAP 1 Clinical Chemistry > 3.3.6 Electrolytes (Calcium) > Flashcards

3.3.6 Electrolytes (Calcium) Flashcards

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1
Q

Calcium homeostasis are regulated by:

  • Thyroid hormone
  • Active Vit D
  • Calcitonin

which of the following does not belong?

A

Thyroid

Should be Parathyroid

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2
Q

Promotes calcium by Bone resorption

a. Parathyroid
b. Active Vit D
c. Calcitonin

A

a

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3
Q

Promotes calcium by Reabsorption of Ca and Excretion of Phosphate

a. Parathyroid
b. Active Vit D
c. Calcitonin

A

a

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4
Q

Promotes calcium by Intestinal absorption of Ca

a. Parathyroid
b. Active Vit D
c. Calcitonin

A

b

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5
Q

Activates 25 Hydroxycholecalciferol (25 (OH)D3)

a. Parathyroid
b. Active Vit D
c. Calcitonin

A

a

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6
Q

Activates Vit D

a. Parathyroid
b. Active Vit D
c. Calcitonin

A

a

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7
Q

1,25 Dihydroxycholecalciferol / 1,25 (OH)2D3

a. Active form of Vit D
b. Inactive form of Vit D

A

a

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8
Q

25 Hydroxycholecalciferol / 25 (OH)D3

a. Active form of Vit D
b. Inactive form of Vit D

A

b

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9
Q

Inhibits Parathyroid hormone actions

a. Parathyroid
b. Active Vit D
c. Calcitonin

A

c

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10
Q

Promotes calcium bu reabsorption of both Ca and PO4

a. Parathyroid
b. Active Vit D
c. Calcitonin

A

b

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11
Q

Releases PTH that acts on Bone and Kidneys

a. Parathyroid Gland
b. Bone
c. Kidneys
d. Small intestin
e. Thyroid gland (C-cells)

A

a

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12
Q

RESORPTION of Ca

a. Parathyroid Gland
b. Bone
c. Kidneys
d. Small intestin
e. Thyroid gland (C-cells)

A

b

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13
Q

REABSORPTION of Ca

a. Parathyroid Gland
b. Bone
c. Kidneys
d. Small intestin
e. Thyroid gland (C-cells)

A

c

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14
Q

Produces Calcitonin

a. Parathyroid Gland
b. Bone
c. Kidneys
d. Small intestin
e. Thyroid gland (C-cells)

A

e

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15
Q

Reabsorption of DIETARY Ca

a. Parathyroid Gland
b. Bone
c. Kidneys
d. Small intestin
e. Thyroid gland (C-cells)

A

d

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16
Q

Distribution of Total plasma Ca:

___ Free/Ionizes Ca (Active form)
___ Bound to proteins
___ Bound to Ions

A

50%
40%
10%

17
Q

Normal Ref Value:

a. 4.3-5 mEq/L (8.6-10 mg/dL)
b. 3.4-5 mEq/L (6.8-10 mg/dL)

A

a

18
Q

Panic value of Ca:

Hypocalcemia:____
Hypercalcemia: ____

a. ≤6 mg/dL ; ≥ 13 mg/dL
b. ≤7 mg/dL ; ≥ 14 mg/dL
c. ≤1 mg/dL ; ≥ 2 mg/dL

A

a

19
Q

Gold Standard for Divalent Cations

a. Atomic Absorption Spectrophotometry
b. ISE
c. Dye-binding

A

a

20
Q

Used to measure Ionized Ca

a. Atomic Absorption Spectrophotometry
b. ISE
c. Dye-binding

A

b

21
Q

Routine method for TOTAL calcium

a. Atomic Absorption Spectrophotometry
b. ISE
c. Dye-binding

A

c

22
Q

Ortho-cresolphthalein complexone (CPC) Method

a. Atomic Absorption Spectrophotometry
b. ISE
c. Dye-binding

A

c

23
Q

Ortho-cresolphthalein complexone (CPC) Method requires the addition of 8-hydroxyquinoline that results to what color?

A

Red

24
Q

An alternative dye for calcium determination

a. Arsenazo III
b. Redox Titration method

A

a

25
Q

Has high affinity for Ca and Inhibits mg

a. Arsenazo III
b. Redox Titration method

A

a

26
Q

(+) Results for Aresenazo III?

A

Violet

27
Q

In Redox Titration Methods:

Purple (+)

a. Clark-Collip Oxalic Acid Precipitation
b. Ferro-Ham Chloranilic Acid Precipitation

A

both

28
Q

Primary hyperparathyroidism

a. Hypocalcemia
b. Hypercalcemia

A

b

29
Q

Primary hypoparathyroidism

a. Hypocalcemia
b. Hypercalcemia

A

a

30
Q

Secondary Hypoparathyroidism

a. N to Increase PTH
b. N to Decrease PTH

A

b

31
Q

PTH resistance

a. N to Increase PTH
b. N to Decrease PTH

A

a

32
Q

Malignancy
Multiple myeloma
Vit. D excess (Hypervitaminosis D)
Bone wasting due to prolonged immobilization (bedridden)

a. Hypocalcemia
b. Hypercalcemia

A

b

33
Q
  • Chronic Renal Failure
  • Hypomagnesemia
  • Hypoalbuminemia
  • Pseudohypoparathyroidism
  • Vit. D deficiency
  • Pancreatitis

a. Hypocalcemia
b. Hypercalcemia

A

a

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