What is the process called when embryonic cartilage is replaced by bone cells?

A) Compare and contrast diffusion, passive transport (diffusion & facilitated), primary active transport and secondary activ

zheka24 [161]

Answer:

Passive transport: It does not need any energy to occur. Happens in favor of an electrochemical gradient. Simple diffusion and facilitated diffusion are kinds of passive transport.

Simple diffusion: molecules freely moves through the membrane.

Facilitated diffusion: molecules are carried through the membrane by channel proteins or carrier proteins.

Active transport needs energy, which can be taken from the ATP molecule (Primary active transport) or from a membrane electrical potential (Secondary active transport).

Explanation:

Diffusion: This is a pathway for some small polar hydrophilic molecules that can freely move through the membrane. Membrane´s permeability depends on the size of the molecule, the bigger the molecule is, the less capacity to cross the membrane it has. Diffusion is a very slow process and to be efficient requires short distances and pronounced concentration gradients. An example of diffusion is osmosis where water is the transported molecule.

Facilitated diffusion: Refers to the transport of hydrophilic molecules that are not able to freely cross the membrane. Channel protein and many carrier proteins are in charge of this passive transport. If uncharged molecules need to be carried this process depends on concentration gradients and molecules are transported from a higher concentration side to a lower concentration side. If ions need to be transported this process depends on an electrochemical gradient. The glucose is an example of a hydrophilic protein that gets into the cell by facilitated diffusion.

Simple diffusion and facilitated diffusion are passive transport processes because the cell does not need any energy to make it happen.

Active transport occurs against the electrochemical gradient, so it does need energy to happen. Molecules go from a high concentration side to a lower concentration side. This process is always in charge of carrier proteins. In primary active transport the energy needed comes from the ATP molecule. An example of primary active transport is the Na-K bomb. In secondary active transport, the energy comes from the membrane electric potential. Examples of secondary active transport are the carriage of Na, K, Mg metallic ions.

7 0

3 years ago

Which is an advantage of using embryonic stem cells instead of adult stem cells to help a patient?

AURORKA [14]

Answer:

quicker recovery period for limitless injuries and surgeries

Explanation:

its correct

5 0

3 years ago

Which is false about osmosis and electrolyte balance in the body? when potassium enters cells, then water follows it. water trav

Mariana [72]

Answer: water travels from high to low concentration of the solute

Electrolytes are known to be major components pf body fluid and these electrolytes enter the body through foods. Thus, major regulation of body fluid and electrolyte balance in the body is through the process of osmosis. However, osmosis can be defined as the movement of water through the semipermeable membrane from lower concentration of solute to higher concentration of solute.

6 0

3 years ago

Natural slection is also known as what

alexgriva [62]

Answer: Natural selection is a process by which species of animals and plants that are best adapted to their environment survive and reproduce, while those that are less well adapted die out.

Explanation:

7 0

3 years ago

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During an epileptic seizure, the triggering of convulsions would not directly involve the uncontrolled activity of neurons locat

Olin [163]

The answer is: " thalamus " .
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"During an epileptic seizure, the triggering of convulsions would not directly involve the uncontrolled activity of neurons located in the  thalamus  ."
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8 0

3 years ago