Question

click and drag on elements in order
place the steps of iron metabolism in order. start with absorption from the intestine at the top, and end with its distribution to the body at the bot
instructions
remaining transferrin goes to other organs where fe²⁺ is used.
some transferrin releases fe²⁺ for storage in the liver.
fe²⁺ binds apoferritin to be stored as ferritin.
absorbed fe²⁺ binds to transferrin in plasma.

Explanation:

Step1: Identify the first step

The process starts with absorption of $\text{Fe}^{2+}$ from the intestine, so the first step is "Absorbed $\text{Fe}^{2+}$ binds to transferrin in plasma."

Step2: Identify the second step

After binding to transferrin, some transferrin releases $\text{Fe}^{2+}$ for storage in the liver, so the second step is "Some transferrin releases $\text{Fe}^{2+}$ for storage in the liver."

Step3: Identify the third step

When $\text{Fe}^{2+}$ is released for storage, it binds to apoferritin to be stored as ferritin, so the third step is "$\text{Fe}^{2+}$ binds apoferritin to be stored as ferritin."

Step4: Identify the last step

The remaining transferrin (with $\text{Fe}^{2+}$) goes to other organs where $\text{Fe}^{2+}$ is used, so the last step is "Remaining transferrin goes to other organs where $\text{Fe}^{2+}$ is used."

Answer:

1. Absorbed $\text{Fe}^{2+}$ binds to transferrin in plasma.
2. Some transferrin releases $\text{Fe}^{2+}$ for storage in the liver.
3. $\text{Fe}^{2+}$ binds apoferritin to be stored as ferritin.
4. Remaining transferrin goes to other organs where $\text{Fe}^{2+}$ is used.