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What type of cells protect the neurons in the central nervous system from some substances in the blood?
The blood-brain barrier is a protective mechanism made up of specialized cells (endothelial cells) lining blood vessels in the central nervous system. These cells restrict the passage of substances from the blood into the brain, helping to protect neurons from potential toxins and pathogens.
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.
How do cell membranes work to regulate the movement of substances in and out of cells?
Cell membranes are made up of a double layer of lipids with proteins embedded in them. These proteins act as channels and pumps that control the movement of substances in and out of the cell. The membrane is selectively permeable, allowing some substances to pass through while blocking others. This helps maintain the cell's internal environment and regulate the flow of nutrients and waste products.
What is something that allows some things through it and not others for cells?
The cell membrane is a selectively permeable barrier that allows certain molecules to pass through while restricting others based on factors such as size, charge, and solubility. This property helps regulate the movement of substances in and out of the cell to maintain homeostasis.
Do some cells contain organelles but not others?
Yes, certain types of cells contain specific organelles while others do not, based on their function and specialized requirements. For example, animal cells contain mitochondria for energy production, while plant cells contain chloroplasts for photosynthesis. However, all cells have some common organelles, such as the nucleus and cytoplasm.
What lets substances like food and oxygen diffuse into body cells?
The semi-permeable membrane in cells. Allows some substances to go through and not others.
What animal has a nucleus?
Most animal cells (except for human red blood cells and some others) have a nucleus. It is like a control centre in the cell which allows some substances to enter and others substances to leave the cell. It also initiates chemical reactions and processes like respiration in the cell cytoplasm.
What type of cells protect the neurons in the central nervous systems from some substances in the blood?
Could one conclude that Ependymal cells & Oligodenrocytes blood cells in the CNS protects neurons from some blood substances in blood.
What is the functions of the cell?
functions of a bone cell are, to keep your bones strong and healthy and to keep your bones from not getting weak and breaking.
What is the property that allows only some substances in and out of cells?
The permeability of the cell membrane controls which substances may pass in or out of the cell.
What are some substances produced in human cells?
A lot of substances are made in cells: ATP O2 CO2 pyruvate NADH/FADH2 RNA mRNA, etc.
What do animals use proteins for?
They play various roles. Some make up structural part of the bodies of the animals, others help certain substances pass into and out of cells, while still others, known as enzymes, catalyze chemical reactions.
Does all substances dissolve equally?
No. Some substances dissolve perfectly and are called homogeneous. Others do not and are called Heterogeneous.
Does the substances that take part in a chemical reaction keep their properties?
Some, but not all, substances do so. Such substances are known as catalysts.
What is the feature of plasma membrane that keep some substances out?
Selective Permeability
What is a term that describes substances that absorb some wavelengths of light?
Pigments are substances that absorb some wavelengths of light and reflect or transmit others, giving them their color.
Are all substances the same before and after burning?
No, some substances change their whole form and others just change their color and shape.
