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sergey
1 month ago
15

During the relative refractory period of an action potential, a larger than normal stimulus is needed to cause another action po

tential. this is due to the fact that
Biology
1 answer:
inysia [2.3K]1 month ago
5 0
<span>The refractory period refers to the timeframe after an initial stimulus when a neuron does not respond to any further stimuli.</span><span>
During the relative refractory phase of an action potential, a stimulus greater than usual is required to trigger another action potential. This is because the voltage-gated potassium channels stay open long enough to cause hyperpolarization of the axon's membrane.</span>
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An SDS lysate of red blood cells was submitted to SDS polyacrylamide gel electrophoresis. The sample revealed a major band with
enyata [2506]

Respuesta:

A partir del peso molecular dado - 17,000, la proteína de los glóbulos rojos es Hemoglobina A (Hb A).

Explicación:

La técnica utilizada para la separación de moléculas de proteínas según su tamaño molecular en el estudio de biología molecular, junto con un marcador de proteína de referencia para identificar el tamaño exacto de proteína desconocida, se conoce como electroforesis en gel de poliacrilamida con SDS. Durante el proceso de separación de proteínas, ADN y ARN, entre otros, el dodecil sulfato de sodio se utiliza como un compuesto orgánico sintético empleado como tensioactivo en la solución de lisis.

Con base en el peso molecular dado - 17,000, la proteína en los glóbulos rojos es Hemoglobina A (Hb A). Su función consiste en transportar oxígeno desde los órganos respiratorios hacia el resto del cuerpo y tejidos. La Hb A se presenta en forma de tetámero, es decir, contiene cuatro subunidades que consisten en dos subunidades alfa y dos beta, cada una compuesta por 141 y 146 residuos de aminoácidos, respectivamente. Cada subunidad tiene un tamaño molecular de aproximadamente 16,000 daltones y son estructuralmente similares y del mismo tamaño.

5 0
1 month ago
William is developing the model shown below to illustrate the process of photosynthesis. He plans to use the model to explain ho
11111nata11111 [2571]
The appropriate response is that photosynthesis transports carbon from the atmosphere to the geosphere and into plants.
7 0
29 days ago
The figure below illustrates a eukaryotic cell. Which of the following best describes how the three structures indicated by the
s2008m [2378]

Response: B.) For the purpose of synthesizing and isolating proteins for secretion or internal cellular use.

Explanation:

4 0
1 month ago
Read 2 more answers
Five dialysis bags constructed of membrane, which is permeable to water and impermeable to sucrose, were filled with various con
-BARSIC- [2551]

Answer:

The options

A. A

B. B

C. C

D. E

The CORRECT ANSWER IS D.

E.

Explanation:

It is common practice to utilize dialysis bags or tubing to ensure efficient movement of molecules in liquid contexts. These bags are typically examined to confirm that the contents are sufficient to achieve the intended outcome.

Assuming five dialysis bags made from a semi-permeable material, which does not allow sucrose to pass through, are filled with varying sucrose concentrations and placed in separate beakers containing an initial sucrose concentration of 0.6 M.

Every ten minutes, the bags are weighed to track any changes in weight concerning concentration levels. Under these conditions, the bag with the lowest initial sucrose concentration will see its weight decrease over time, which corresponds to option E.

The graph provided confirms our analysis, showing that option E has the lowest starting sucrose concentration.

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1 month ago
Why is it that evolution genetics and biochemistry are considered as unifying themes in biology
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Without the concept of evolution, biology would be a collection of numerous isolated and interconnected facts.
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