Me a parent notices her preschool child stuttering. at what point should she be concerned? if she notices it more than twice a day if it persists for several months if it continues after the child's 5th birthday if it takes more than four tries to pronounce a sentence

Diseases may arise when proteins fail to fold correctly in their last stages of processing and/or are directed towards the lysosome rather than towards the cell membrane. cystic fibrosis is an example of this type of disease. in cystic fibrosis, a functional ion channel is sent to the lysosome for destruction rather than being sent to the plasma membrane. given this observation, the cellular component that is most likely the cause of the disease is the