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lipids, and ribosomes
lipids
Leonora Medhurst
Wiki User
∙ 13y agoWiki User
∙ 14y agoLarge, polar compounds can not easily cross cell membranes.
Wiki User
∙ 8y agolipids, and ribosomes
lipids
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Which type of molecule can move passively across the membrane?
Water can move passively through a membrane by moving through the pores of a cell. Other substances cannot move through a cell membrane.
When a substance wants to enter the cell it binds to what?
When a substance wants to enter a cell it goes through the cell membrane in a process called endocytosis.
When molecules cannot diffuse across the cell membrane?
Cells have a variety of molecule attached to their membranes. Some of these molecules respond to different stimuli and allow substance to pass in and out of the cell. They can voltage gated, ion gated channels, ligand gated. Cells also engage in pinocytosis, phagocytosis, and exocytosis. This is when the cell membrane engulfs a substance and takes it it or when a membrane bound vesicle fuses with the cell membrane to expel a substance.
4 substance that enters and leaves through the cell membrane?
food enters, waste leaves
What must a substance pass through to enter or leave a cell?
If substances did not pass through cell membranes, then all single-celled and multicellular organisms would die.
Osmosis is the diffusion of what substance through a cell membrane?
Water
What substance will diffuse through a membrane?
The three substances that can diffuse through a cell membrane are CO2, O2, AND H2O.
What is the procces by which a substance is released from the cell through a vesicle that transports the substance to the cell surface in then fuses with the membrane to let the substance out?
exocytosis
What is the process by which a substance is released from the cell through a vesicles that fuses with the membrane to let the substance out?
Exocytosis
When a substance wants to enter the cell it binds to what?
When a substance wants to enter a cell it goes through the cell membrane in a process called endocytosis.
Which type of molecule can move passively across the membrane?
Water can move passively through a membrane by moving through the pores of a cell. Other substances cannot move through a cell membrane.
The cell membrane allows some substance to pass through it and exclude others this is possible because the cell membrane is?
semi permeable
What are molecules that helps control the movement of a substance through the cell membrane?
Proteins
What is the The uphill movement of a substance through a living cell membrane?
Active Transport
What is the semipermeable membrane?
The cytoplasm of a cell is surrounded by a cell membrane or plasma membrane. The membrane is said to be 'semi-permeable', in that it can either let a substance pass through freely, pass through to a limited extent or not pass through at all.the membrane is somewhat effective at letting fluids through
What substance crosses the cell membrane through osmosis?
Only water is transported through the process of osmosis.
What substance must pass through a cell's membrane for the cell to continue to function?
water and nutrients.
