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Which one holds corona radiata?...

Which one holds corona radiata?

A

Muscopolysaccharide

B

Oligosaccharide

C

Lipolysaccharide

D

Lipoprotein.

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Corona Radiata**: The corona radiata is a layer of cells that surrounds the egg (oocyte) in the ovarian follicle. It is crucial for the egg's protection and nourishment. 2. **Location of Corona Radiata**: The corona radiata is located adjacent to the zona pellucida, which is the glycoprotein layer surrounding the egg. 3. **Function of Corona Radiata**: The primary function of the corona radiata is to provide vital proteins necessary for the fertilization of the egg. These proteins support the egg's development and interaction with sperm. 4. **Origin of Corona Radiata**: The cells of the corona radiata are derived from squamous granulosa cells that are present during the primordial stage of follicular development. As the follicle matures, these cells transition to a cuboidal shape and are referred to as granulosa cells. 5. **Chemical Composition**: The zona pellucida secretes mucopolysaccharides, which are essential for holding the corona radiata in place. These mucopolysaccharides provide structural support and facilitate the interaction between the egg and sperm. 6. **Identifying the Correct Answer**: Among the given options (mucopolysaccharide, oligosaccharide, lipopolysaccharide, lipoprotein), the correct answer is **mucopolysaccharide** as it is the substance that holds the corona radiata. **Final Answer**: Mucopolysaccharide holds the corona radiata. ---
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Hyaluronic acid which binds corona radiata cells is a :-

Each of the following questions/statements has four suggested answers. Choose the correct answer: Layers of an ovum from outside inside are:- i. Corona radiata, zona pellucida and vitelline membrane ii. Zona pellucida, corona radiata and vitelline membrane iii. Vitelline membrane, zona pellucida and corona radiata iv. Zona pellucida, vetelline membrane and corona radiata

Knowledge Check

  • Consider the following four statements and select the correct option stating which ones are true (T) and which ones are false (F). (i) The scrotum acts as a thermoregulator, maintaining the testes at a temperature 2^(@) lower than that of the body (ii) Corona radiate layer of the ovum prevents polyspermy. (iii) Middle part of ear is derived from the endoderms layer. (iv) The hormone, human chorionic gonadotropin facilitates parturition by softening the connective tissue of the public symphysis.

    A
    `{:("(i)","(ii)","(iii)","(iv)"),(T,T,F,F):}`
    B
    `{:("(i)","(ii)","(iii)","(iv)"),(F,T,F,T):}`
    C
    `{:("(i)","(ii)","(iii)","(iv)"),(T,F,T,F):}`
    D
    `{:("(i)","(ii)","(iii)","(iv)"),(F,F,T,T):}`

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    which of the following statements regarding fertilization and implantation are incorrect ? I. During fertilization , a sperm first comes in contact with the corona radiata cells produced by the ovum. II. Fertilization occurs only if sperm and ovum are simultaneously transported to the ampullary region. III. Implantation occurs about 7 days after fertilization . IV. The continuous division of morula leads to the formation of zygote.

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    Cells of corona radiata disperse just

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