Which surface of this epithelial membrane is indicated by the thick arrow?Multiple choice question.ConnectiveApicalBasalStriated

To determine which surface of the epithelial membrane is indicated by the thick arrow in your question, let's briefly analyze the options provided:

1. Connective - This term generally refers to connective tissues, not surfaces of epithelial membranes.
2. Apical - The apical surface is the uppermost layer of epithelial tissue, facing the lumen or external environment.
3. Basal - The basal surface is the bottom layer of epithelial tissue that sits on the basement membrane.
4. Striated - This term usually pertains to certain types of muscle tissues that have a striped appearance and is not relevant to epithelial surfaces.

Conclusion:

Given the options and common terminology related to epithelial membranes, the thick arrow most likely indicates the Apical surface. This is the surface of epithelial cells that is exposed to the outside or the lumen of an organ.