Basics of communication 1 Flashcards
What are the 3 types of signalling between cells?
Free diffusion
Via cytoplasmic connections
Direct cell to cell contact
What are the 3 classifications of free diffusion?
Autocrine
Paracrine
Endocrine
What is autocrine?
Signaling and reception by same cell
What is paracrine?
Signalling between nearby cells
What is endocrine?
Signalling between distant cells
How do cytoplasmic connections work?
Transfer to neighbour cell through pores
What is direct cell to cell contact?
Specific interactions between surface molecules on one cell and receptors on another cell
What are the 2 types of signalling molecules?
Local regulators
Hormones
What are the 4 local receptors?
Growth factors
Gases
Prostaglandins
Neurotransmitter
What are hormones controlled by?
Neuroendocrine system
What is the control centre for hormones?
Hypothalamus
Name 3 major glands of the endocrine system
Thymus
Pancreas
Pituitary gland
How is homeostasis of blood sugar regulated?
Negative feedback loop
Define homeostasis
Maintenance of a relatively stable internal environment in the face of stress from the external and internal environments
What are the two main classes of hormones?
Peptides and steroids
