Fig. 6.1 shows a photomicrograph of a section through a Bowman’s capsule and a glomerulus. On Fig. 6.1, use label lines and letters to identify: F - where the glomerular filtrate is found; P - where the blood plasma is found.
Glomerular filtration rate (GFR) is the speed at which fluid moves from the blood in the glomerulus into Bowman’s capsule. Fig. 6.2 gives the mean GFR values for healthy males and females in different age groups. Use Fig. 6.2 to calculate the annual decrease in mean GFR from the 20-29 age group to the 80-89 age group for females. Show your working. Give your answer to one decimal place and include units.
A person's age and whether they are male or female can influence GFR. Suggest and explain other factors that can affect GFR.
The glomerular filtrate moves from Bowman’s capsule into the proximal convoluted tubule, where selective reabsorption occurs. Describe the process of selective reabsorption.