The initiation of metabolic reactions in the egg is necessary for the fertilization process to occur. Among the options provided, the correct answer is: An influx of Ca2+ into the egg across the plasma membrane.

Here's why:

1. Fusion of the plasma membranes of the sperm and egg: This is an important step in fertilization, but it is not directly involved in initiating metabolic reactions in the egg.

2. An influx of Ca2+ into the egg across the plasma membrane: This is the correct answer. The influx of calcium ions (Ca2+) into the egg is a key trigger for the metabolic reactions that occur after fertilization. These reactions include the activation of enzymes that prevent other sperm from fertilizing the egg and the initiation of the process that leads to the first cell division.

3. A release of Na+ from internal stores: While sodium ions (Na+) do play roles in cell function, they are not directly involved in initiating the metabolic reactions in the egg after fertilization.

Question

The initiation of metabolic reactions in the egg is necessary for the fertilization process to occur. Among the options provided, the correct answer is: An influx of Ca2+ into the egg across the plasma membrane.

Here's why:

1. Fusion of the plasma membranes of the sperm and egg: This is an important step in fertilization, but it is not directly involved in initiating metabolic reactions in the egg.

2. An influx of Ca2+ into the egg across the plasma membrane: This is the correct answer. The influx of calcium ions (Ca2+) into the egg is a key trigger for the metabolic reactions that occur after fertilization. These reactions include the activation of enzymes that prevent other sperm from fertilizing the egg and the initiation of the process that leads to the first cell division.

3. A release of Na+ from internal stores: While sodium ions (Na+) do play roles in cell function, they are not directly involved in initiating the metabolic reactions in the egg after fertilization.

Knowee AI · Accepted Answer

The initiation of metabolic reactions in the egg is necessary for the fertilization process to occur. Among the options provided, the correct answer is: An influx of Ca2+ into the egg across the plasma membrane.

Here's why:

1. Fusion of the plasma membranes of the sperm and egg: This is an important step in fertilization, but it is not directly involved in initiating metabolic reactions in the egg.

2. An influx of Ca2+ into the egg across the plasma membrane: This is the correct answer. The influx of calcium ions (Ca2+) into the egg is a key trigger for the metabolic reactions that occur after fertilization. These reactions include the activation of enzymes that prevent other sperm from fertilizing the egg and the initiation of the process that leads to the first cell division.

3. A release of Na+ from internal stores: While sodium ions (Na+) do play roles in cell function, they are not directly involved in initiating the metabolic reactions in the egg after fertilization.

Which of the following is necessary for the initiation of metabolic reactions in the egg?Multiple choice question.Fusion of the plasma membranes of the sperm and eggAn influx of Ca2+ into the egg across the plasma membraneA release of Na+ from internal stores

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