Indicate whether each statement is true or false. 1. Rod cells respond to stimul
ID: 3481679 • Letter: I
Question
Indicate whether each statement is true or false.
1. Rod cells respond to stimuli by hyperpolarizing and when they are not stimulated gated Na+ channels in their membrane are open and Na+ flows into the cell.
2. Glutamate binds to receptors on the postsynaptic membranes of bipolar cells of the retina and causes them to depolarize.
3. The adjustment of the eyes to changes in light is called light and dark adaptation and is accomplished by changes in the amount of available iodopsin.
4. When light reactions occur, retinal is completely released from opsin so that it may be converted back to vitamin A to maintain equilibrium.
Explanation / Answer
1.true. rod cellreceptor potential is hyper polarising not depolarising duen to conductance of sodium ion .
2.true.depolaisation of bipolar cell of retina by release of glutamte by rods and cones.
3.false .the afjustment of light is called light adaptation.it is due to large potions of bith photichemical in noth rods and cones reduced to ratinal and opsins.
4.true.when light tlreaction occur retinal converted to opsin and all trnas retinal.