(02.03 lc)cell membranes are often called a “fluid mosaic” of lipids and proteins. what is the role of the cell membrane structures?

The cell membrane controls the motions of the substances in and out of the body’s cells.  Its common and basic function is for the protection of the cell from its surroundings.  The cell membrane is usually consists with lipid bilayer with embedded proteins.

Selectively allow some materials into the cell

the answer is admiramos

the rule for verbs is whoever you are referring to (in this case 'nosotros'), you need to change the ending of the word.

nosotros - amos

yo - o

tu - as

el, ella, usted - a

ellos, ellas, ustedes - an

(examples: nosotros bailamos (instead of bailar) or yo hablo (instead of habla)

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.