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4 years ago

Describe the birth process. Gross...

Biology

2 answers:

Shtirlitz [24]4 years ago

6 0

1. First Stage: Dilation and Effacement of the Cervix

a. early phase

b. active phase

c. transition phase

2. Second Stage: Pushing and Birth

3. Third Stage: Delivery of the Placenta

Pachacha [2.7K]4 years ago

6 0

The process of labor and birth is divided into three stages:

The first stage begins when you start having contractions that cause progressive changes in your cervix and ends when your cervix is fully dilated. This stage is divided into two phases:

Early labor: Your cervix gradually effaces (thins out) and dilates (opens).Active labor: Your cervix begins to dilate more rapidly, and contractions are longer, stronger, and closer together. People often refer to the last part of active labor as transition.

The second stage of labor begins when you're fully dilated and ends with the birth of your baby. This is sometimes referred to as the "pushing" stage.

The third stage begins right after the birth of your baby and ends with the delivery of the placenta.

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4) We add NaOH to the sample. If we see precipitate, it can be because of the the ions Fe³⁺, Ni²⁺, Co²⁺ or Mn²⁺.

5) We observe the color of this precipitate. If it is brown is Fe(OH)₃, if it is green is Ni(OH)₂, if it is pink is Co(OH)₂, and if it is white is Mn(OH)₂.

Se toma la muestra problema o alícuota y se añade HCl 2N. Con este reactivo precipitan los cationes del Grupo I ( Plata (I), Plomo (II) y Mercurio (I)): AgCl, PbCl2 y Hg2Cl2. Sobre el mismo embudo se añade agua de ebullición, quedando en el papel de filtro el AgCl y el Hg2Cl2; el Pb2+ puede identificar añadiendo KI, que origina un precipitado de PbI2 que se disuelve en caliente, que sirve para identificarlo mediante la llamada lluvia de oro.1

Sobre el mismo papel de filtro se añade NH3 2N. En el papel de filtro si existe Hg22+ y se forma una mancha blanca, gris o negro, que es una mezcla de HgClNH2 y Hg0. En la disolución se forman Ag(NH3)2+, que se puede identificar con KI dando un precipitado de AgI amarillo claro.

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