Transport of Large Molecules (Bulk Transport)

  • 13/03/2025

Transport of Large Molecules (Bulk Transport)

During bulk transport the membrane changes its form and shape. It occurs in two ways: (i) Endocytosis (taking the substance in) (ii) Exocytosis (passing the substance out)

Endocytosis is of two types:

(i) Endocytosis

Phagocytosis

  1. intake of solid particles
  2. membrane folds out going round the particle, forming a cavity and thus engulfing the particle

Pinocytosis

  1. intake of fluid droplets
  2. membrane folds in and forms a cup like structure sucks in the droplets

Cell membrane regulates movement of substance into and out of the cell. If the cell membrane fails to function normally the cell dies.

Leave a Reply

Your email address will not be published. Required fields are marked *

You May Also Like
The Respiratory System

The Respiratory System

The Respiratory System The Respiratory System is the anatomical system of an organism that introduced respiratory gases to the interior and performs gas exchange. In humans and other mammals, the…
View Post
Other Nutrients

Other Nutrients

Other Nutrients Other micronutrients include antioxidants and phytochemicals. These substances are generally more recent discoveries that have not yet been recognized as vitamins or as required. Phytochemicals may act as…
View Post
Non Respiratory System

Non Respiratory Functions

Non Respiratory Functions Lung defense mechanisms Airways epithelial cells can secrete a variety of molecules that aid in lung defense. Secretory immunoglobulins (IgA), collections (including Surfactant A and D), defensins…
View Post

Branches of Biology

Branches of Biology These are the main branches of biology: Aerobiology – The study of airborne organic particles Agriculture – The study of producing crops from the land, with an…
View Post
Temperature Control

Temperature Control

Temperature Control Panting in dogs and some other animals provides a means of controlling body temperature. This physiological response is used as a cooling mechanism. Coughing and Sneezing Irritation of…
View Post

Foundations of Modern Biology

Foundations of Modern Biology Much of modern biology can be encompassed within five unifying principles: Cell theory, Evolution, Genetics, Homeostasis and Energy. Cell Theory Cells in culture, stained for keratin…
View Post