Interstitial fluid represents one type of extracellular material. The cell (plasma) membrane normally contains substantial amounts of cholesterol. Aquaporins are believed to be present in red blood cells and kidney tubules, but very few other cells in the body.
What part of the cell membrane is usually in contact with the interstitial fluid?
Which of the following is not a major function of proteins in the cell membrane? The glycocalyx is composed mostly of carbohydrates. What part of a cell membrane is usually in contact with the interstitial fluid? The phosphate heads of the phospholipids are polar, so they are attracted to the polar water molecules.
Which of the following is a principle of the fluid mosaic model?
Which of the following is a principle of the fluid mosaic model of cell membrane structure? Phospholipids form a bilayer that is largely impermeable to water-soluble molecules.
Which of the following statements is most correct regarding the intracellular chemical signals known as second messengers?
Which of the following statements is most correct regarding the intracellular chemical signals known as “second messengers”? Second messengers act through receptors called K-proteins. Second messengers usually inactivate protein kinase enzymes. Cyclic AMP and calcium may be second messengers.
What is not a constituent of a plasma membrane?
Proline is a secondary amino acid which is not found in plasma membrane.
What is the difference between extracellular fluid and interstitial fluid?
The intracellular fluid is the fluid contained within cells. The extracellular fluid—the fluid outside the cells—is divided into that found within the blood and that found outside the blood; the latter fluid is known as the interstitial fluid.
What do osmosis and diffusion have in common?
Both osmosis and diffusion equalize the concentration of two solutions. Both diffusion and osmosis are passive transport processes, which means they do not require any input of extra energy to occur. In both diffusion and osmosis, particles move from an area of higher concentration to one of lower concentration.
Why are membranes described as fluid mosaic?
Explanation: It is sometimes referred to as a fluid mosaic because it has many types of molecules which float along the lipids due to the many types of molecules that make up the cell membrane. For example , there are a lot of types of proteins embedded in the membrane.
Why is fluid mosaic model called fluid mosaic?
Why is it called fluid mosaic model? The phospholipid molecules and the molecules of cholesterol are linked together. This keeps the cell membrane intact and cohesive. This is why it is called fluid mosaic model.
Why do phospholipids form a bilayer?
When phospholipids are mixed with water, they form a phospholipid bilayer or double layer due to their amphipathic nature. The polar hydrophilic head group will interact with water to form hydrogen bonds with water but the two hydrophobic tails made of non-polar hydrocarbon tails repel water.
What happens after solid material is Phagocytized?
Terms in this set (25) Once solid material is phagocytized and taken into a vacuole, which of the following statements best describes what happens? A lysosome combines with the vacuole and digests the enclosed solid material.
Which of the following is a difference between primary and secondary active transport?
Which of the following is a difference between primary and secondary active transport? >> In primary active transport, the transport protein gets phosphorylated; in secondary active transport, the transport protein is not phosphorylated.
Which organelle is seen in this figure?
Which cellular organelle is seen in this figure? Structure of a mitochondrion. Mitochondria are characterized by an oblong shape with inner and outer membranes.
What are the 4 main components of the plasma membrane?
The principal components of the plasma membrane are lipids ( phospholipids and cholesterol), proteins, and carbohydrates.
Which one of the following is constituent of cell membrane?
Cell membranes are composed primarily of fatty-acid-based lipids and proteins. Membrane lipids are principally of two types, phospholipids and sterols (generally cholesterol).
Is interstitial fluid intracellular or extracellular?
The intracellular fluid (ICF) is the fluid within cells. The interstitial fluid (IF) is part of the extracellular fluid (ECF) between the cells.
Is interstitial fluid extracellular fluid?
The main component of the extracellular fluid (ECF) is the interstitial fluid, or tissue fluid, which surrounds the cells in the body. The other major component of the ECF is the intravascular fluid of the circulatory system called blood plasma. The remaining small percentage of ECF includes the transcellular fluid.
What is the difference between interstitial fluid and plasma?
The main difference between plasma and interstitial fluid is that plasma contains more proteins whereas interstitial fluid contains fewer proteins. Most of the other dissolved products such as nutrients and electrolytes occur in similar concentrations in both plasma and interstitial fluid.
What is osmosis differentiate between its two types?
Difference Between Osmosis and Diffusion
| Parameter | Osmosis |
|---|---|
| Medium | It takes place only in a liquid medium. |
| Concentration | The solvent’s concentration does not become equal on both of the membrane sides. |
| Dependence | It depends on solute potential. Furthermore, it mainly depends on the number of solute particles in the solvent. |
Is osmosis a type of diffusion?
Osmosis is a special type of diffusion, namely the diffusion of water across a semipermeable membrane.
Which one of the following is an example of osmosis?
An example of osmosis can be the intake of water molecules in plants. The most common examples of osmosis is provided by all plants and animals.
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