Answer:
membrana celular
Explanation:
El transporte celular es el intercambio de sustancias a través de la membrana plasmática, que es una membrana semipermeable.1
El transporte es importante para la célula porque le permite expulsar de su interior los desechos del metabolismo, también el movimiento de sustancias que sintetiza como hormonas. Además, es la forma en que adquiere nutrientes mediante procesos de incorporación a la célula de nutrientes disueltos en el agua. Las vías de transporte a través de la membrana celular y los mecanismos básicos para las moléculas de pequeños tamaños son:
Índice
1 Transporte pasivo
1.1 Ósmosis
1.1.1 Ósmosis en una célula animal
1.1.2 Ósmosis en una célula vegetal
1.2 Difusión facilitada
2 Transporte activo
2.1 Transporte activo primario: Bomba de sodio y potasio o Bomba Na+/K+
2.2 Transporte activo secundario o cotransporte
3 Transporte en masa
3.1 Endocitosis
3.2 Exocitosis
4 Véase también
5 Referencias
6 Enlaces externos
Mg+alcl3-->mgcl2+al is the
Answer:
Explanation:
The chemical equation for the reaction is :
The standard enthalpy of formation of the above equation is as follows:
= -1274.4 kJ/mol
= -277.7 kJ/mol
= -393.5 kJ/mol
where ;
= stochiometric coefficients of products
stochiometric coefficients of reactants
= formation standard enthalpy of products
= formation standard enthalpy of reactants
For ;
The standard enthalpy of formation of of the reactant and the products are :
The is as follows:
(to kJ/K)
Given that;
at T = 25°C = ( 25 + 273) K = 298 K
As is negative; the reaction is spontaneous
= negative
= positive; Therefore , the reaction is spontaneous at all temperature , We can then say that the spontaneity of this reaction is dependent on temperature.
Answer:
c. estrogen > propanol > alanine > sodium
Explanation:
The phospholipid bilayer is formed by amphoteric lipids, the nonpolar region is inside the bilayer, so the diffusion of nonpolar molecules are easy (nonpolar reacts with nonpolar) and generally occurs passively (without loss of energy). With the increase of the polarity, the diffusion became difficult and slow. All the molecules are shown below.
Estrogen has two points of polarity in its hydroxides, but the carbon rings stabilize the molecule, and it has low polarity. Then, propanol has only one hydroxide and is the second-lowest polar molecular. Alanine has two points of polarity because oxygen and nitrogen have high electronegativities. Then, the ion sodium has a charge and has no stabilization such as the molecules, so it is the most difficult to diffuse.