How do substances move across cell membranes?
substances are transported across cell membranes via passive, active and bulk transport process.
- passive transport occurs when substances can cross the semipermeable plasma and organelles membranes and move down the concentration gradient without using energy and happen through diffusion, facilitated diffusion and osmosis.
- active transport occurs when substances are transported up their concentration gradient from a lower to a higher concentration. sodium potassium pump is an active transport mechanism that maintains homeostasis to be electrolytes sodium and potassium.

Now close reading is an essential and foundational skill needed to succeed in any language arts course. acquiring this skill will you form a strategy when writing about literature. you will be required to perform and develop this skill as you progress through this course and other courses in your school career. identify and discuss your areas of strength in language arts. what do you do well? what do you like doing in a course like this? why do those tasks work well for you? you can also identify a challenge you have that you’d like to work on throughout this course. use this discussion as an opportunity to give advice to your classmates based on your stronger skills and to ask for with skills you are still developing.

Brainliest 98 points it’s so fragile even just saying its name can break it. what is it?

Araby every morning i lay on the floor in the front parlour watching her door. the blind was pulled down to within an inch of the sash so that i could not be seen. when she came out on the doorstep my heart leaped. i ran to the hall, seized my books and followed her. i kept her brown figure always in my eye and, when we came near the point at which our ways diverged, i quickened my pace and passed her. this happened morning after morning. i had never spoken to her, except for a few casual words, and yet her name was like a summons to all my foolish blood. what is the general tone of the passage? a. courageous b. comical c. passionate d. fearful