Which of the following statements correctly describe(s) the driving forces for diffusion of na+ and k+ ions through their respective channels? select all that apply. a. the diffusion of na+ ions into the cell is facilitated by the na+ concentration gradient across the plasma membrane. b. the diffusion of na+ ions into the cell is impeded by the electrical gradient across the plasma membrane. c. the diffusion of k+ ions out of the cell is impeded by the k+ concentration gradient across the plasma membrane. d. the diffusion of k+ ions out of the cell is impeded by the electrical gradient across the plasma membrane. e. the electrochemical gradient is larger for na+ than for k+.

Secondary succession would most likely be taking place in a(n)

Hurry i need your (100 points) 1) what are the responsibilities of the region of the brain highlighted below? (picture located below) the highlighted portion is at the rear base of the brain, behind the brain stem. regulating homeostasis, hunger and eating, thirst and drinking, and many other functions of basic survival. coordinating movement and balance by using information from sensory nerves, including hand-eye coordination. controlling voluntary body movements, processing information from sense organs, thoughts, and learning abilities. regulating important involuntary bodily functions such as blood pressure, heart rate, breathing, and swallowing. 2)which of the following systems or structures is correctly paired with its function? neurons - brain cells that control thoughts, calculations, and memory cerebral cortex - portion of the brain that controls involuntary body movement peripheral nervous system - carries impulses to and from the central nervous system central nervous system - carries information from the nerves to the muscles and glands

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.