Import Question JSON

Current Question (ID: 14175)

Question:

What regulates the opening of oesophagus into the stomach?

Options:

1. A membranous valve
2. A muscular sphincter
3. A mesodermal septum
4. A cartilaginous flap

Solution:

The opening of the esophagus into the stomach is regulated by a muscular sphincter called the lower esophageal sphincter (LES), also known as the cardiac sphincter. The LES is located at the junction of the esophagus and the stomach and controls the flow of food and liquids into the stomach. The LES remains closed most of the time to prevent the contents of the stomach, including stomach acid, from flowing back up into the esophagus, which can cause heartburn and other digestive problems. When food or liquids are swallowed, the LES relaxes to allow them to pass into the stomach, and then it closes again to prevent reflux.

Import JSON File

Upload a JSON file containing LaTeX/MathJax formatted question, options, and solution.

Expected JSON Format:

{
  "question": "The mass of carbon present in 0.5 mole of $\\mathrm{K}_4[\\mathrm{Fe(CN)}_6]$ is:",
  "options": [
    {
      "id": 1,
      "text": "1.8 g"
    },
    {
      "id": 2,
      "text": "18 g"
    },
    {
      "id": 3,
      "text": "3.6 g"
    },
    {
      "id": 4,
      "text": "36 g"
    }
  ],
  "solution": "\\begin{align}\n&\\text{Hint: Mole concept}\\\\\n&1 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\text{ moles of carbon atom}\\\\\n&0.5 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\times 0.5 \\text{ mol} = 3 \\text{ mol}\\\\\n&1 \\text{ mol of carbon} = 12 \\text{ g}\\\\\n&3 \\text{ mol carbon} = 12 \\times 3 = 36 \\text{ g}\\\\\n&\\text{Hence, 36 g mass of carbon present in 0.5 mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6].\n\\end{align}",
  "correct_answer": 4
}