Cells must use energy to move a substance against a concentration gradient (i. e., from a compartment with a low concentration of the substance to a compartment with a higher concentration). which of the following processes would require a cell to expend energy? choose all of the correct answers. transport of sodium ions out of cells transport of sodium ions into cells transport of potassium ions out of cells transport of potassium ions into cells transport of calcium ions out of cells transport of calcium ions into the cytoplasm of a cell from the ecf transport of calcium ions out of the cytoplasm of a cell and into an organelle that has a high concentration of calcium ions. transport of calcium ions out of an organelle that has a high concentration of calcium ions and into the cytoplasm of a cell.

When a person is exercising the body needs to deliver increased amounts of oxygen to the muscles which component of blood ensures that the muscles will receive it

Rachel ate a piece of fruit and happened to drop the seeds in her backyard. after a few weeks, she saw a small plant with flowers growing in the backyard. which group does this plant belong to? a. angiosperms b. gymnosperms c. pteridophytes d. bryophytes e. chytrids

Can someone pretty me with this ? it’s urgent. compare the three theories of emotion. here are the three theories of emotion. cannon-bard theory of emotion: the belief that both psychological arousal and emotional experience are produced stimultaneously ( at the same time) by the same nerve stimulus. james-lange theory of emotion: the belief that emotional experience is a reaction to bodily events occurring as a result of an external situation. ( “ i feel sad because i am crying.) schachter-singer theory of emotion: the belief that emotions are jointly determined by a nonspecific kind of psychological (bodily function) arousal and its interpretation, based on environmental ( natural surroundings) cues. which of these theories makes most sense to you? why. your response should be written using proper english spelling and grammar. and it needs to be 10 complete sentences.