Explain why it is useful for the pancreas cells that secrete digestive enzymes to have lots of rough endoplasmic reticulum and golgi apparatus.

Which of these is not a function of some membrane proteins ? a. allowing polar molecules to enter the cell b. recognizing other types of cells c. receiving messeges from other cells b. carrying messages to oher cells

Classify the structures as homologous or analogous, depending on their structure and function.

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.