U2-L6.1 Cellular communication

Question 1

importance of cellular communication

Answer 1

• regulate their development and organization
• control their growth and division
• coordinate their roles

Question 2

stages of cellular communication

Answer 2

1. Reception: a signal molecule binds a specific receptor on the membrane or inside the cell
2. Transduction: transmission of the signal to effector molecules (on the surface of the cell or inside the cytoplasm)
3. Cellular response: changes in gene expression, enzymatic activity, ionic concentration
4. Resetting: by degradation, deactivation or detachment of the signal molecule

Question 3

Answer 3

Question 4

chemical signaling types

Answer 4

autocrine: the sending cell is the one receiving the molecule (cancer)
Examples:
* The inflammatory response
* The regulation of cell growth
* Cancer

paracrine: hese molecules act locally on neighboring cells
Crucial to:
* Coordinate cellular behavior within a restricted area
* Quick and specific response to stimuli in the environment

Question 5

endocrine

Answer 5

Endocrine cells secrete hormones into the bloodstream, which travel through the blood vessels and act on target cells that are widely distributed throughout the body