The Nephron (aka renal tubules)

Question 1

what is the nephron (basic)

Answer 1

the structural and functional units of kidney - a filtration device

Question 2

what are the 3 basic renal processes

Answer 2

1. filtration
2. reabsorption
3. secretion

Question 3

where does filtration occur

Answer 3

in the glomereulus to bowman’s capsule

Question 4

explain this process of filtration

Answer 4

blood flows into the glomereulus through the afferent arteriole, passes through capillaries and comes out of the efferent arteriole
the capillaires become narrow close to the exit which increases blood pressure and forces protein free blood into bowmans capsule
this is now filtrate and it travels down to nephron

Question 5

explain this process of selective reabsorption

Answer 5

dissolved substances in filtrate are reabsorbed into blood through selective movement from the nephron tubule back into capillaries by active transport

Question 6

explain the process of faculative reabsorption

Answer 6

active process of reabsorbing water and urea in the distal convoluted tube and collecting duct under hormone control
anti dieuretic hormone changes permeability to absorb more or less

Question 7

explain the process of secretion

Answer 7

secretion through distal convoluted tube into bladder and then into toilet