Page 1 of 1: Physiology-ageing

kannan · Credits: 6918 My Scrapbook

Which of the following does not change with age
a]glucose tolerance
b]FEV1
c]GFR
d]hematocrit

a or d?

manpreet108 · Credits: 30682 My Scrapbook

The release of insulin by the older pancreas is impaired under hyperglycemic conditions. Peripheral tissues in general are less responsive to insulin

Forced expiratory volume in 1 second (FEV1) decreases by 0.2 to 0.3 liters per decade in nonsmoking men. In women, changes are smaller and more gradual

significant linear decreases in creatinine clearance with age (7.5 to 10 mL per minute per decade). However, there is wide variability among older individuals
Over intervals from 15 to 20 years, some persons ( < 5%) have increases in their glomerular filtration rate (GFR). About one third have no change at all, one third have a slight decline, and one third have a more marked decline

With increasing age, bone marrow mass decreases and bone marrow fat increases. At times of high demand, functional reserve may be limited

ref--internet-various sources.

not sure about option 4.but 1,2,3 are def changing.

what is the ans given?4??

kannan · Credits: 6918 My Scrapbook

yes the ans given is 4

ardy · Credits: 12764 My Scrapbook

ans is haemoocrit

kannan · Credits: 6918 My Scrapbook

thanks both of u

draditithegreat · Credits: 1248000 My Scrapbook

ref harri: pg38

few imp points r

general:increased body fat

eyes:presbyopia,lens opacification

endocrine:impaired glucose homeostasis

renal:decreased gfr n urine conc ability and hence i think adh is increased

we get in cn and gu atrophy

in cvs
decreased arterial complince n increased sys bp leading to lvh

decreased b-adrenergic response hence decreased co n hr in response to stress

decreased baroreceptor sensitivity n sa node
automaticity and hence impaired bp response to standing or volume response....
_________________

BRAVO · Credits: 46015 My Scrapbook

vagus nerve is inhibitory to heart and stimulatory to GIT....isnt it funny...

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