Kit Library / Science / Biology
Quick KitShared by a Veda learner · Generated with Veda AI
Veda Bites are swipeable micro-lessons — each one teaches exactly one idea. Here's a taste from this kit; the app has the full deck.
Every cell's selective barrier.
The cell membrane (plasma membrane) is a selectively permeable barrier that surrounds the cell, controlling what enters and exits. It maintains homeostasis by allowing nutrients in and waste out, while preventing harmful substances from entering.
↳ The cell membrane is the cell's gatekeeper, selectively allowing substances in and out.
A thin, flexible boundary.
The cell membrane is a phospholipid bilayer with embedded proteins. It is about 7-8 nm thick and is found in all cells, separating the interior from the external environment.
↳ The cell membrane is a thin, flexible phospholipid bilayer that encloses every cell.
Protection with controlled entry.
Imagine the cell membrane as a castle wall with guarded gates. The wall (phospholipid bilayer) provides structural protection, while the gates (protein channels) allow specific visitors (molecules) to pass through, keeping enemies (harmful substances) out.
↳ The cell membrane is like a castle wall with gates—protection plus controlled entry.
The cell membrane is a selectively permeable phospholipid bilayer that controls the movement of substances in and out of the cell. Its fluid mosaic structure, with embedded proteins, supports transport, communication, an...
~8 min · full explanation, examples & memory tricks in the app
19 questions laddered from warm-up to topper-level, each with an explanation. A taste:
Which model best describes the structure of the cell membrane?
BeginnerFluid mosaic model
The fluid mosaic model, proposed by Singer and Nicolson, describes the membrane as a fluid lipid bilayer with embedded proteins, which is the most widely accepted model.
Which component of the cell membrane is primarily responsible for the membrane's fluidity?
IntermediatePhospholipids
Phospholipids, with their unsaturated fatty acid tails, create a fluid matrix. Cholesterol modulates fluidity but is not the primary contributor.
What is the main function of the cell membrane?
BeginnerTo control the movement of substances in and out of the cell
The cell membrane is selectively permeable, regulating what enters and exits the cell, which is its primary function.
Which part of the phospholipid molecule is hydrophilic?
BeginnerPhosphate head
The phosphate head is polar and charged, making it hydrophilic (water-loving), while the fatty acid tails are nonpolar and hydrophobic.
17 flashcards in this kit — the app reviews them with spaced repetition so the right card returns on the right day.
Every game is built from this kit's own content — scores feed your mastery, so playing counts as studying.
The full Veda Bites deck, complete notes, spaced-repetition flashcards, leveled MCQs, tests and games for this kit — plus Daily Facts and the Arena, every day.
