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Does osmosis or facilitated diffusion require the presence of membrane channels?
Facilitated diffusion requires the presence of membrane channels or transporters to move molecules across the membrane. Osmosis, on the other hand, does not require membrane channels as it involves the passive movement of water molecules through the lipid bilayer of the membrane.
What is the advantage of the presence of on cell membranes?
the membrane has a greater surface area for an increased rate of diffusion
Why is plasma membrane flexible?
The plasma membrane is flexible due to the presence of phospholipid molecules that can move and change position. This fluidity allows the membrane to bend and stretch, enabling the cell to change shape and facilitating the movement of molecules in and out of the cell.
Flexible nature of a cell membrane results from?
The flexible nature of a cell membrane is mainly due to its composition of phospholipids, which contain both hydrophobic and hydrophilic components. These phospholipids form a bilayer that allows the membrane to be fluid and flexible, enabling the cell to change shape and adapt to its environment. Additionally, the presence of cholesterol in the membrane can also contribute to its fluidity and flexibility.
Which molecules are processed by the rough endoplasmic reticulum-?
The rough ER appears rough due to the presence of ribosomes on the membrane surface.
Does the presence of albumin in capillary blood result in hydrostatic pressure?
No
Does osmosis or facilitated diffusion require the presence of membrane channels?
Facilitated diffusion requires the presence of membrane channels or transporters to move molecules across the membrane. Osmosis, on the other hand, does not require membrane channels as it involves the passive movement of water molecules through the lipid bilayer of the membrane.
Why antibiotics act on bacterial cytoplasmic membrane but not mammilian cytoplasmic membrane?
maybe because, the structure of cytoplasmic membrane of mammilian is different from the bacteria. It is may allowed by the presence of different antigen in its membrane.
What is the explanation for the process of capillary exchange?
Capillary exchange is the process by which substances, such as oxygen and nutrients, are exchanged between the blood in capillaries and the surrounding tissues. This occurs through diffusion, facilitated diffusion, and active transport. The exchange is driven by a concentration gradient and the movement of substances across the capillary wall is regulated by small pores called fenestrations and by the presence of transport proteins.
A person's blood type is determined largely by the?
presence of specific glycoproteins on the cell membrane.
Which of the following factors does not affect membrane permeability?
The presence of membrane proteins does not directly affect membrane permeability. Membrane proteins mainly play a role in transport, signaling, and cell recognition rather than impacting the permeability of the membrane itself.
What is the advantage of the presence of on cell membranes?
the membrane has a greater surface area for an increased rate of diffusion
How does the presence of a semipermeable membrane affect the movement of water molecules during osmosis?
The presence of a semipermeable membrane during osmosis allows water molecules to pass through while blocking larger molecules. This causes water to move from an area of higher concentration to an area of lower concentration, balancing the concentration on both sides of the membrane.
Which is a factor that determies whether a mole can cross a cell membrane?
Lipid solubility determines if it will diffuse across. The presence of specific protein carrier molecules determines if it will be transported across the membrane.
Which observation provides evidence that a cell is most likely a eukayrote?
the organelles are enclosed in membranes
What type of cell functions does the presence of microvilli typically indicate?
The presence of microvilli typically indicates that the cell is involved in absorption, as microvilli increase the surface area of the cell membrane, allowing for more efficient nutrient absorption. Cells with microvilli are commonly found in tissues involved in absorption, such as the small intestine.
Do plant and animal cells have a nuclear membrane?
Yes, both plant and animal cells have a nuclear membrane that surrounds the nucleus. This membrane helps to protect the genetic material inside the nucleus and regulates the passage of molecules in and out of the nucleus.
