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morpeh [17]
3 years ago
6

What hormonal change occurs after fertilization that causes the endometrial lining to remain intact so that the fertilized egg c

an successfully implant in it?
Biology
2 answers:
zavuch27 [327]3 years ago
8 0

Answer: Progesterone.

Explanation:

In a mature female if fertilization occurs, the egg gets attached to the endometrium layer of uterus.

The pituitary gland secretes luteinzing hormone and follicle stimulating hormone.that stimulates ovary to produce estrogen and progesterone.

Estrogen is responsible for thickening of the endometrial lining and progesterone keeps endometrium intact so that the fertilized egg can be successfully implanted.

Julli [10]3 years ago
3 0
Human chorionic Gonadotropin
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Explain how specific membrane-bound organelles of the keratinocytes are used to produce, transport, and modify aquaporin polypep
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Answer:

Epidermis.

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Stratum Basale.

It is a cuboid-shaped stem cell that is a precursor of the keratinocytes of the epidermis. Two other cell types found in this basal cell are Merkel cells which function as a receptor and are responsible for stimulating sensory nerves that the brain perceives as touch. The second is melanocyte that produces melanin pigment which gives the skin its color.

Stratum spinosum.

It is spiny in appearance due to the protruding cell processes that join the cells via a structure called desmosome. The desmosome cell interlock with each other to strengthen the bond between the cell. Keratinocytes in the stratum spinosum stats synthesizing keratin and release water-repelling glycolipid that helps to prevent water losses from the body.

Stratum granulosum.

They are grainy in appearance due to further change in keratinocytes as they are pushes from the stratum spinosum. The cells become flat as their membrane thickens to allow the production of protein keratin which accolades as lamellar granules within the cells.

Stratum Lucidum.

It is a smooth and translucent layer of the epidermis situated above the stratum granulosum. Keratinocytes containing these cells are dead and flat. Stratum lucidum cells are packs with eleiden derived from keratohyalin which give these cells their transparency and provide a barrier to water.

Stratum corneum.

This is the most superficial layer in the epidermis and it prevents penetration of microbes and dehydration of underlying tissues.

Dermis.-This is the inner layer of the skin and has the following functions.

Reticular layer

Just below the papillary layer, we have a much thicker layer called the reticular layer composing of dense connective tissue. It contains elastin fibers providing elasticity to the skin enabling movement.

Hypodermis

Explanation:

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3 years ago
Describe the voyage of a red blood cell through the circulatory system in 1-2 Paragraphs.
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Answer:

the beginning of the journey of the red blood cell starts in the bones (inside it) where there is formation of  blood cell. the the aid of the capillary(within it), the red blood cells travels round the body. the deoxygenated blood then goes to the heart in the vena cava. the red blood cell then journey into the right atrium even after the red blood cell has made its way into the heart, the right atrium contracts and then pushes the blood cell via the tricuspid and thereafter into the right ventricle where the right ventricle then contracts and pushes the blood cell out of the heart via the aid of the semi luna.

the red blood cell journey down to the lungs, picks up oxygen and goes back to the heart and enters the left atruim and its contracts and pushes the blood cell via the bicuspid into the left ventricle which pushes the red blood cell out of the heart into the aorta, journey down to the kidney's trunk and lower limb's. the the deoxygenated blood then travels up with the aid of the vena cava. it is a circulatory process. all the process goes round and start again from the beginning

Explanation:

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