0
Things that aren't charged. Charged particles can't cross the hydrophobic tails, but are attracted to the outward-facing hydrophilic phosphate heads. Things that are charged can still diffuse into the cell, but it must be facilitated by proteins present within the cell membrane.
Oxygen and carbon dioxide are some examples of things that can freely diffuse across the cell membrane, water and ions are some example of things that must be facilitated by protein channels.
Wiki User
∙ 13y ago
Wiki User
∙ 9y agoDiffusion aallows molecules to spread out in more places. Cells use diffusion to allow the molecules to freely move in and out of cell.
Wiki User
∙ 11y agoWater keeps on diffusing from one cell to the other to maintain basic Osmotic Potential
Wiki User
∙ 12y agowater
Add your answer:
Earn +20 pts
What is the name of the tiny gap the neurotransmitter has to diffuse across to reach the membrane of the postsynaptic neuron?
the synapse
Name 3 particles that are small enough to diffuse freely across the cell membrane?
H2O CO2 O2 hope this helps
What protein is an integral membrane protein that helps move molecules across a cell membrane?
identify the name and purpose of the cell membrane proteins that look like tunnels
What is the name of the process when glucose enters cells?
Glucose can move into cells by active or passive transport, in both cases membrane-spanning proteins are required. Active transport (SGLT) uses the concentration gradient of Sodium ions to move glucose against its concentration gradient. Passive transporters (GLUT) are only effective if the concentration of glucose in the cell is lower than outside the cell.
Name the 2 ways that materials can pass through the cell membrane?
The two ways that materials can pass through the cell membrane are active transport and passive transport. In active transport the molecules cannot pass freely across the membrane and have to be carried across in ways that require energy. In passive transport the molecules can pass freely across the membrane in ways that do not take any energy.
What is the name of the tiny gap the neurotransmitter has to diffuse across to reach the membrane of the postsynaptic neuron?
the synapse
What type of molecule can diffuse across a membrane by squeezing between the phospholipids?
Many gasses, water and lipids to name a few.
Name 3 particles that are small enough to diffuse freely across the cell membrane?
H2O CO2 O2 hope this helps
What is the name for the diffusion water across a semipermeable membrane?
osmosis
What is the name for the diffusion of water across semipermeable membrane?
osmosis
What is the name for the movement of water across the plasma membrane?
Osmosis
What protein is an integral membrane protein that helps move molecules across a cell membrane?
identify the name and purpose of the cell membrane proteins that look like tunnels
What is the diffusion of water across the semipermeable?
Diffusion of water across a semipermeable membrane is a type of simple diffusion given the special name of osmosis.
What is a membrane protein?
A trans-membrane protein is - as the name implies (trans = across in latin) - a protein, which crosses a biological membrane, such as the outer cell membrane or the mitochondrial membrane. Three examples of important trans-membrane proteins are: the Na/K-ATPase, P-glycoprotein, and the insulin receptor.
What is protein membrane?
A trans-membrane protein is - as the name implies (trans = across in latin) - a protein, which crosses a biological membrane, such as the outer cell membrane or the mitochondrial membrane. Three examples of important trans-membrane proteins are: the Na/K-ATPase, P-glycoprotein, and the insulin receptor.
What is the diffusion of water across a semipermeable memberane?
Diffusion of water across a semipermeable membrane is a type of simple diffusion given the special name of osmosis.
What is the name of the process where materials are moved across a cell membrane?
Active transport.The energy is provided by a high-energy molecule, often ATP.Active transport is used to move a substance against (= up) its concentration gradient.Diffusion is what moves across the plasma membrane. This cannot move across water.
