<h2>Answer:</h2>
The goal of transcription is to produce a RNA from a DNA segment.
<h3>Explanation:</h3>
- Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA).
- DNA safely stores genetic material in the nuclei of cells as a blue print or template.
- The purpose of translation is to synthesize proteins, which are used for millions of cellular functions.
I think its A) A antigens
Gram staining identifies
different bacteria types and it separates bacteria into two groups (gram negative
and gram positive) based on their cell wall constituents through the use of different
special dyes. Simple staining involves the use of a single stain solution and
is unable to identify the exact organism.
Answer:
Venous return (VR) is the flow of blood back to the heart.
Venous return to the right atrium is the most important factor determining cardiac output, provided both ventricles and the pulmonary circulation are normal.
Explanation:
Venous return refers to the flow of blood from the periphery back to the right atrium, and except for periods of a few seconds, it is equal to cardiac output.
Venous return is facilitated by a number of factors, including inspiration, increased total blood volume, increased venomotor tone, the cardiac suction effect, the presence of venous valves and the skeletal muscle pump.
Contraction of the skeletal muscles surrounding veins increases the pressure within the veins, pushing open the proximal valve and forcing blood toward the heart. For example, when calf muscles contract during exercise, blood is forced toward the heart, thus increasing venous return.
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