Which of the following is not a way that the cardiovascular system to maintain homeostasis? .
a. the heart increases or decreases its rate of contraction to accommodate body needs for blood circulation.
b. the blood vessels expand or constrict to regulate blood flow to certain areas of the body..
c. the blood carries nutrients to the tissue cells and waste products away from the tissue cells..
d. the heart produces hormones that are released into the body.

Which of the following is a difference between active transport and facilitated diffusion? view available hint(s)which of the following is a difference between active transport and facilitated diffusion? facilitated diffusion can move solutes against a concentration gradient, and active transport cannot. active transport involves transport proteins, and facilitated diffusion does not. facilitated diffusion involves transport proteins, and active transport does not. active transport requires the expenditure of cellular energy, and facilitated diffusion does not.

Which is the correct order in the scientific process? ask a question ® form a hypothesis ® make an observation ask a question ® make an observation ® form a hypothesis make an observation ® form a hypothesis ® ask a question make an observation ® ask a question ® form a hypothesis

What is the ecological role of food chains and food webs