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Sholpan [36]
2 years ago
10

Serous fluid in the pericardial cavity __________. serous fluid in the pericardial cavity __________. is a remnant of embryonic

development increases friction between the beating heart and the outer wall of the pericardial sac is a slippery fluid secreted by the fibrous pericardium is secreted by the heart itself is secreted by the epithelial cells of both layers of the serous pericardium
Biology
2 answers:
Bas_tet [7]2 years ago
4 0

Answer:

surgical puncture into the pelvic cavity to remove fluid from the space between the rectum and uterus, called the rectouterine pouch (Douglas's cul-de-sac).

vekshin12 years ago
4 0

Answer:

The correct answer will be option-is secreted by the epithelial cells of both layers of the serous pericardium

Explanation:

Serous fluid is a fluid which resembles the serum of the blood in its color which is pale yellow to transparent.

The serous fluid is present in the cavities of the body organs like in heart, the fluid is present in the pericardial cavity.

The serous fluid lubricates the wall of the heart and is produced by the serous pericardial membranes. The secreted fluid gets collected between the pericardial cavity which helps slide the smooth movement of the serous layer against each other.

Thus, secreted by the epithelial cells of both layers of the serous pericardium is the correct answer.

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What are the common promoter elements found in eukaryotic genes, and how are they different from enhancer elements?
V125BC [204]

Answer:

In eukaryotic cells you find core and proximal promoters.

Promotors are specific DNA sequences where transcription factors (proteins) and RNA polymerase binds to initiate transcription. Promotors are located upstream the coding sequence

Core promoters are where RNA polymersae binds and proximal promoters are where transcription factors bind.

Enhancer elements are DNA sequences where transcription factors (proteins) bind to increase the rate of expresion of an specific gene. Enhancers can be located either upstream,  downstream or thousands of nucleotids away  from the of the coding region.

Explanation:

Promoters and enhancer are key elements for controling gene regulation. Transcription begins when chromatin rearranges from a condensed state to a accesible state, this allow to transcrition factors and RNA polymerase to  bind specif DNA sequences (promotors).  Proteins bind to enhancers , this complex develops a DNA loop, so that the protein that is bound to the enhancer interacts with the RNA polymersase. When this interaction is made, the activity of the RNA polymerase is increased.

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3 years ago
Which of the following is a way humans use Which of the following is a way humans use trees? a. paper b. food c. wood d. all of
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