Problem 22 - Arihant Objective Approach to Organic Chemistry for IIT JEE and NEET all Medical Entrances Part 4

Question

The hormone that helps in the conversion of glucose to glycogen is : [CBSE 2004] (a) cortisone (b) bile acids (c) adrenalin (d) insulin

Step-by-Step Solution

Answer

Insulin (d)

Step 1: Identify the Role of Each Hormone

To solve the problem, first identify the role of each hormone and its relation to glucose and glycogen conversion. - Cortisone is related to glucose metabolism and helps in the response to stress, but not directly in glucose to glycogen conversion. - Bile acids are involved in fat digestion and absorption, not in carbohydrate metabolism. - Adrenalin increases blood glucose levels during the fight-or-flight response by breaking down glycogen, not forming it. - Insulin is the hormone that lowers blood glucose levels by facilitating its conversion into glycogen for storage in the liver and muscles.

Step 2: Choose the Correct Option

Now that we've identified insulin as the hormone that helps convert glucose to glycogen, we choose the correct option from the given choices: (d) insulin.

Key Concepts

Glucose to Glycogen Conversion

The process of converting glucose into glycogen is a remarkable metabolic pathway that plays a crucial role in maintaining energy balance in our bodies. After consuming carbohydrates, our digestive system breaks them down into glucose, the simplest form of sugar. This glucose enters the bloodstream, available for immediate energy needs or storage for future use. When the body has an excess of glucose, insulin stimulates its conversion into glycogen.
The liver and muscles are the main sites for glycogen storage, where it can be readily mobilized during periods of low blood sugar or high energy demand. This conversion is essential to prevent high blood sugar levels, which can have harmful effects on the body's cells and tissues.

Insulin Role

Insulin is a vital hormone produced by the pancreas, primarily involved in regulating blood glucose levels. It acts as a key to open cells, allowing glucose to enter and be used for energy. Insulin's most notable function is facilitating the conversion of excess glucose into glycogen, a process known as glycogenesis.
This hormone ensures blood sugar levels remain stable after meals by:

• Enhancing glucose uptake by muscle and fat cells.
• Promoting glycogen synthesis in the liver and muscles.
• Inhibiting the breakdown of fat and glycogen.

Without adequate insulin, or if the cells respond poorly to it, glucose levels can rise to dangerous levels, leading to conditions such as diabetes. Therefore, insulin is not only crucial for glucose metabolism but also for sustaining overall metabolic health.

Carbohydrate Metabolism

Carbohydrates are one of the primary sources of energy for the body. Upon digesting carbohydrates, they are transformed into glucose, which can either be immediately used for energy or stored as glycogen.
Carbohydrate metabolism encompasses several processes, such as:

• Glycolysis: The breakdown of glucose to extract energy in the form of ATP.
• Glycogenesis: The conversion of glucose to glycogen for storage.
• Glycogenolysis: The conversion of stored glycogen back into glucose when energy is required.
• Gluconeogenesis: The production of glucose from non-carbohydrate sources during prolonged fasting or strenuous exercise.

Understanding carbohydrate metabolism is key to comprehending how the body balances energy needs with nutrient availability, thus maintaining optimal health and vitality.