Cell T is an example of the cells that form the surface of the villi. Explain why there are many microvilli on cell T.

Some of the cells on the surface of the villi secrete mucus for protection.
Suggest what the villi need to be protected against.​

Scientists are conducting a study on the effectiveness of a new drug on memory loss. they are giving some of the test subjects the new drug to find out if it improves their long-term memory. which are possible limitations of this study? check all that apply. a) test subjects may want to participate in additional experiments. b) test subjects may think they should be paid more. c) test subjects may get bored and want to quit early. d) test subjects may have to travel during the experiment. e) test subjects may have full-time jobs. this is multiple choice. you for the !