A:
q:
some molecules are too big to pass through the phospholipid bilayer of the cell membrane. these molecules need to pass
through
that are embedded in the cell membrane,
a)
proteins
ribosome
cell wall
d)
carbohydrates
i think the answer is cell wall

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.