please answer these questions

[jaskiran]

Free radical injury is caused by each of the following except...
1.Hydrogen per oxide
2.chemicals
3.U V radiations
4.ischemic injury

stimulation of carotid sinus results in
1.increased heart rate,increased arterial blood pressure,decreased venous pressure
2.decreased heart rate,decreased arterial blood pressure,decreased venous pressure.
3.increased heart rate,decreased arterial blood pressure,decreased venous pressure.

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[gudluk]

Free radical injury is caused by each of the following except...
1.Hydrogen per oxide
2.chemicals
3.U V radiations
4.ischemic injury(ans)

ironically i was reading this today itself so remembered this one

stimulation of carotid sinus results in
1.increased heart rate,increased arterial blood pressure,decreased venous pressure
2.decreased heart rate,decreased arterial blood pressure,decreased venous pressure.(ans)
3.increased heart rate,decreased arterial blood pressure,decreased venous pressure.

hope this helps
tc

 

[aphistis]

Concur.

 

[jaskiran]

Excuse me guys please check this site.http://www.cosmos-club.org/web/journals/2002/bulkley.html.Ischemic injury is also free radicalradical injury.

 

[jaskiran]

and for second question can u please explain.

 

[robhmnt]

and for second question can u please explain.

High blood pressure --> stimulation of carotid sinus --> sending message to medulla --> medulla lowers heart rate, arterial and venous blood pressure.

One can answer this question without knowing about the carotid sinus function. An increase or decrease in heart beat always corresponds to an increase or decrease in arterial and venous blood pressure. The other two choices don't make sense.