Qualification > Sciences
Biology Paper 1 and 3 help HERE ONLY!!!
Aodian:
--- Quote from: unknown on June 07, 2009, 08:53:11 am ---hey guys thx a lot fr d help amazing
can somone help me out wth kidney thing
i mean tht absoption then ultra filtration n al tht n wht is d job of phagocytes isnt it engulfing d bacteria n thts it na
--- End quote ---
Kidneys..
Ultrafiltration.
The blood enters the glomerulus from the Afferent arteriole and it leaves through the Efferent Arteriole. The blood pressure in the AFFERENT arteriole is HIGH because it comes from the AORTA(via renal artery). When it goes out through the EFFERENT arteries which have a smaller diameter compared to the AFFERENT arteriole.. A high resistance in blood flow is caused. This produces a high hydrostatic pressure in the glomerulus.. Pretty much like pushing hughe amounts of dough through a pasta maker.. (bad example sry)
The high incoming pressure of blood in the glomerulus causes most of the constituents in the plasma to be FILTERED out of the glomerulus (through thin capillary walls with pores) into the cavity of the Bowman's Capsule..
Ultrafiltration is the process whereby all the constituents of blood plasma.. except RBS nad platelets and plasma proteins are filtered out under high pressure..
a lil long winded explanation but i hope it helps..
unknown:
--- Quote from: 247sports on June 07, 2009, 08:59:47 am ---
--- Quote from: unknown on June 07, 2009, 08:53:11 am ---hey guys thx a lot fr d help amazing
can somone help me out wth kidney thing
i mean tht absoption then ultra filtration n al tht n wht is d job of phagocytes isnt it engulfing d bacteria n thts it na
--- End quote ---
k first the kidney recievs the blood from aorta via renal artires....then it goes thru absorbtion n filteration where glucose r all absorbd but excess amino ascids some salts n minerls n some water is left behind in the kidney....the filterd blood is taken bak to teh body via renal vein (vena cava)
then the waste products is sent by the ureter to the bladder where urine is stored....l8r its excretd out thru urethra..
now there r two types of white blood cells phagocyte n lymphocyte
lymphocyte produces anibodies which fites against the bacteria whereas phagocyte engulfs teh bacteria
lymphocyets are produced in the lymphatic system
hope this helps
any coorection regardin these notes r welcomed :)
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thx man...i gt it
unknown:
hey guys thx fr d help gt 1 more q fr u all
suggest y we r aware of the blind spot when both eyes r open
Aodian:
--- Quote from: unknown on June 07, 2009, 09:16:48 am ---hey guys thx fr d help gt 1 more q fr u all
suggest y we r aware of the blind spot when both eyes r open
--- End quote ---
cud u rephrase ur question i didnt reli get that..
gonnagetana:
u know, i have a feeling this paper is gonna have a lot of stuff about plants, cuz in paper 6, there was hardly any.
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