communication between cells

Question 1

reasons for cell signaling

Answer 1

process information (sensory stimuli: e.g. sight, sound); self preservation (identify danger and take appropriate actions: e.g. spinal reflexes, sympathetic nervous system); voluntary movement (e.g. getting from A to B; completing daily tasks); homeostasis (e.g. thermoregulation, glucose homeostasis)

Question 2

intracellular signalling physiological functions

Answer 2

ionotropic receptor, G-protein coupled receptor, enzyme-linked receptor, intracellular receptor

Question 3

principle of ionotropic receptor

Answer 3

ligand binding opens ion permeable pore traversing membrane

Question 4

principle of G-protein coupled receptor

Answer 4

ligand binding activates IC G-protein

Question 5

principle of enzyme-linked receptor

Answer 5

ligand binding causes receptor clustering which activates internal enzymes

Question 6

principle of intracellular receptor

Answer 6

membrane permeable ligand binds to receptor inside cell