0
membrane
Vada Boyer
Add your answer:
Earn +20 pts
When some substances can pass across them but others cannot biological membranes are said to have?
They are said to have semi-permeable membranes.That is,they allow some substances to pass through & prevent others due to the nature & composition of that substance.
What does it mean to say most biological membranes are selectively permeable?
Selectively permeability is a property of biological membranes that allows them to regulate the passage of substances across them. In spite of heavy traffic through them, cell membranes are selectively permeable, and substances do not cross the barrier indiscriminately.
Do all substances pass freely between the intracellular and extracellular fluids through a phospholipid bilayer?
No, the membrane is known as semi-permeable because some substances (such as water) can pass freely through - whereas others (such as ions) cannot.
How does the composition of the cell membrane help regulate the movement of substances into and out of the cell?
They pass through channels in the cell membrane.
What does it mean for a cell membrane to be selectively permeable?
it allows some substances to pass through but blocks the passage of others.
What substances can pass across them but others cannot?
semi-permeable membranes
When some substances can pass across them but others cannot biological membranes are said to have?
They are said to have semi-permeable membranes.That is,they allow some substances to pass through & prevent others due to the nature & composition of that substance.
What does it mean to say most biological membranes are selectively permeable?
Selectively permeability is a property of biological membranes that allows them to regulate the passage of substances across them. In spite of heavy traffic through them, cell membranes are selectively permeable, and substances do not cross the barrier indiscriminately.
Biological membranes are said to have what When some substances can pass across them but others cannot?
Semi-permeable membranes, crucial to osmotic processes.
When some substances can pass across them but others can not what are biological membranes said to have?
selective permeability or semi-permeability
State one possible reason a certain substance cannot pass across a cellmembrane?
One possible reason behind the inability of a certain substances to pass across a cell membrane is molecule size.
What is the cell membrane which makes some substances can pass through it while others cannot?
The phospholipid bi-layer.
Why does the walls of the capillaries and the alveoli have to be thin?
If their walls are too thick, substances like oxygen and nutrients and waste cannot pass across the cells into or out of the body.
Do all substances pass freely between the intracellular and extracellular fluids through a phospholipid bilayer?
No, the membrane is known as semi-permeable because some substances (such as water) can pass freely through - whereas others (such as ions) cannot.
What is the skin of the cell body acts like a screen letting some substances pass in and out while blocking others?
The skin of the cell bodyl; acts like a screen,letting some substances pass in and out while blocking others
What characteristics of cell membrane allows for some substances to pass through but not others?
wwww
When some substances can pass across them but other can not biological membranes are said to have?
selective permeability or semi-permeability
