Please help with some physio questions

[swamifez]

) Chronic acidosis promotes:
A) Bone Mineralization
B) Bone formation
C) Bone Resorption
D) Bone Calcification

My guess is A, becuase acidosis has a net calcium efflux from bone mineral and causes osteoporosis.

2) Blockade of carbonic anhydrase in the kidneys should:
A) Increase urinary bicarbonates, increase plasma pH
B) Decrease uriniary bicarbonates, decrease plasma pH
C) Decrease urinary bicarbonates, increase plasma pH
D) Increase urinary bicarbonates, decrease plasma pH

3) Portal hypertension due to increased intra hepatic resistance is caused by:
A) Thrombosis of hepatic vein
B) Cirrhosis
C) Thrombosis of portal vein
D) Thrombosis of hepatic artery

4) Which hormones prompt the organism to use lipids rather than carbohydrates as energy source:
A) Growth hormone and cortisol
B) Thyroid hormone and insulin
C) Thyroid hormones and leptin
D) A and C are correct

5) The plateau of cardiac muscle action depends on:
A) Fast sodium channels
B) Slow calcium channels
C) Fast calcium channels
D) Chloride channels

6) Among the following, who are most likely to experience a silent heart attack?
A) Those who are suffering a heart attack for the first time
B) Diabetics
C) Most men with a family history of heart disease
D) All Answers are correct

7) White thrombus:
A) Is an unable structure
B) Can stop bleeding in some conditions
C) Is produced by some clotting factors, which can be produced only by platelets
D) A and B are correct

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[aspiringmd1015]

bone mineralization? bone resorption

 

[thehundredthone]

) Chronic acidosis promotes:
A) Bone Mineralization
B) Bone formation
C) Bone Resorption
D) Bone Calcification

My guess is A, becuase acidosis has a net calcium efflux from bone mineral and causes osteoporosis.

So how is that promoting mineralisation? That promotes resorption.

2) Blockade of carbonic anhydrase in the kidneys should:
A) Increase urinary bicarbonates, increase plasma pH
B) Decrease uriniary bicarbonates, decrease plasma pH
C) Decrease urinary bicarbonates, increase plasma pH
D) Increase urinary bicarbonates, decrease plasma pH

D. The kidney carbonic anhydrase is responsible for the resorption of HCO3- from the urine, so blockade would increase the urinary HCO3- and hence decrease plasma pH.

3) Portal hypertension due to increased intra hepatic resistance is caused by:
A) Thrombosis of hepatic vein
B) Cirrhosis
C) Thrombosis of portal vein
D) Thrombosis of hepatic artery

B. The hepatic vessels do not contribute to portal hypertension. The portal vein is extra hepatic.

4) Which hormones prompt the organism to use lipids rather than carbohydrates as energy source:
A) Growth hormone and cortisol
B) Thyroid hormone and insulin
C) Thyroid hormones and leptin
D) A and C are correct

D. Growth hormone and cortisol are stress hormones, i.e. they cause hyperglycaemia. This is because they promote glucose conservation. Leptin also promotes lipid metabolism.

5) The plateau of cardiac muscle action depends on:
A) Fast sodium channels
B) Slow calcium channels
C) Fast calcium channels
D) Chloride channels

B. Slow calcium channels. Fast sodium channels are responsible for phase 0 and 1.

6) Among the following, who are most likely to experience a silent heart attack?
A) Those who are suffering a heart attack for the first time
B) Diabetics
C) Most men with a family history of heart disease
D) All Answers are correct

B. Diabetics.

7) White thrombus:
A) Is an unable structure
B) Can stop bleeding in some conditions
C) Is produced by some clotting factors, which can be produced only by platelets
D) A and B are correct

A white thrombus is the kind that is formed in arteries. It is largely associated with unstable angina/NSTEMI. Although it's made predominantly of platelets (residual blood flow washes the RBC away), I don't think it's produced by platelet specific clotting factors because it's still a fibrin thrombus and fibrinogen is a serum product.

 

[swamifez]

Thank you so much thehundredthone