The diameter of arterioles is regulated by .

A.) the skeletal muscle pump
B.) the parasympathetic division of the ANS adjusting diameter to regulate systemic blood pressure
C.) local factors (chemicals) in peripheral tissues signaling smooth muscle cells to either contract or relax
D.) valves inside the arterioles
E.) precapillary sphincters

Explain the significance of the increased cell specialization of the volvocine line

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen

Which are reasons cells undergo cell division?