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borishaifa [10]
2 years ago
11

The walls of the alveoli are composed of two types of cells

Biology
1 answer:
yuradex [85]2 years ago
6 0
Alveoli walls are composed of Type 1 and Type 2 alveolar cells
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Bioflix activity: membrane transport -- vocabulary review can you match the processes involved in membrane transport to their de
Natalka [10]

Explanation:

<u></u>

<u>From the diagram with corresponding labels:</u>

  1. Exocytosis
  2. Facilitated diffusion
  3. Endocytosis
  4. Diffusion
  5. Active transport

<u>Further explanation:</u>

Via diffusion, small water molecules can move across the phospholipid bilayer acts as a semi-permeable membrane into the extracellular fluid or the cytoplasm which are both hydrophilic and contain large concentrations of polar water molecules or other water-soluble compounds.

Via osmosis, the water passes through the membrane due to the difference in osmotic pressure on either side of the phospholipid by layer this means that the water moves from regions of high osmotic pressure/concentration to regions of low pressure/ concentration to a steady state.

Active transport is a mediated process that requires the use of specialized membrane proteins these proteins require energy in the form of avenues and triphosphate or ATP in order to facilitate necessary conformational changes to the large protein molecules.

Carrier proteins and channel proteins are the two major classes of membrane transport proteins; these allow large molecules called solutes (including essential biomolecules) to cross the membrane. Channel proteins which are pores filled with water versus enabling charged molecules to diffuse across the membrane,  from regions of high concentration to regions of lower concentration. This is a passive part of facilitated diffusion

<em>...some very large molecules require specialized type of active transport in order to move across the membrane this includes endocytosis and exocytosis</em>

<em> </em>

During endocytosis large molecules cells and cell fragments moved across the plasma membrane through a process of invagination; piece of the external cell membrane falls into itself and forms a small pocket that surrounds the target molecule this breaks off from the membrane to form an intracellular vesicle; different methods of endocytosis such as Phagocytosis, Pinocytosis and receptor-mediated endocytosis, take in cells,  water and targeted substances respectively.

Similarly, in exocytosis, the particles (Protein, Waste material etc.) surrounded by a phospholipid membrane. However, this membrane is formed in the cytoplasm, and attaches to the plasma membrane’s interior in a process opposite to endocytosis;  material is removed from the cell and exported into the cell’s exterior called the extracellular space.

Learn more about membrane components at brainly.com/question/1971706

Learn more about plasma membrane transport at brainly.com/question/11410881

#LearnWithBrainly

3 0
3 years ago
A scientist who wants to study the affects of fertilizer on plants sets up an experiment. Plant A gets no fertilizer, Plant B ge
jeyben [28]

Answer:

Option C, Plant A

Explanation:

Control group within an experiment is the substance/organism or subject which shall enact as a base for comparison of impact of experiment created on the dependent variables.  

Here, the impact of fertilizer is to be studied on plant. Thus, plant set up is dependent variable and amount of fertilizer is an independent variable. Out of all plants one plants is getting 0 amount of fertilizer hence this plant can be used for comparison with other plants which receives the fertilizers.  

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How are drugs for HIV patients administered?
miskamm [114]
D. In a regimen of two to four drugs
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Which organelle is responsible for the modification and packaging of proteins so that they can be distributed to other parts of
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Answer:

Vacuoles

Explanation:

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How long ago did oceans begin to form?<br> 12.5 MYA<br> 137 MYA<br> 285 MYA<br> 3800 MYA
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They begin to form about 3.8 billion years ago

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