The answer to this question is "fluid mosaic model". We are being asked the question above and the complete sentence is below:
The contemporary description of the membrane structure of a cell is commonly known as the FLUID MOSAIC MODEL.
B. Brain and spinal cord
The nervous system is an organ system in charge of sending messages to and from the brain<span> and </span>spinal cord<span> to and from all parts of the body. </span>
Relevant: It measures an important part of an objective or output;
<span>Objective: </span>If two people measure the same indicator using the same tool, they should get the same result. The indicator should be based on fact, rather than feelings or impressions (another way to say this is to say that it should be Measurable);
Available: Indicators should be based on data that is readily available, or on data that can be collected with reasonable extra effort as part of the implementation of the (sub-) project.
Realistic: It should not be too difficult or too expensive to collect the information (related to the next one in the list);
Specific: The measured changes should be attributable to the project, and they should be expressed in precise terms
Molten Lava, and not solid like the crust.
