E. provide a \"doof nogi 20. Molecules that serve as chemical signals in cell to

Question

E. provide a "doof nogi 20. Molecules that serve as chemical signals in cell to cell communication are called A. isotopes. B. ligands. C. responders. D. communicators. E. membrane potentials. 21. Which of the following will increase the rate of diffusion? A. an increase in the viscosity of the solvent B. an increase in the temperature C. an increase in the molecular weight of the diffusing particles D. an increase in the distance the molecules have to travel E. All of these choices are correct. 22. Which of the following is most inferior in location? A. pelvic cavity B. mediastinum C. diaphragm D. pleural cavity E. pericardial cavity 23. Osmosis is the diffusion of across a selectively permeable membrane. A. urea B. oxygen C water

Explanation / Answer

Q20 (B) Ligands.

Q21 (E) All of these choices are corect.

Q22 (A) Pelvic cavity.

Q23 (C) Water.

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