Which of the following is NOT an example of ultrafiltration?
Ultrafiltration is filtration under pressure. Filtration at the systemic and glomerular capillaries are examples of ultrafiltration. Formation of CSF is paly ultrafiltration and paly by secretion of ependymal cells. Secretion of bile is an active process.
Filtration at systemic capillaries
Formation of CSF
Filtration at the glomerulus
Secretion of bile by hepatocytes
Concepts in physiology