Column-I | Column-II | ||
---|---|---|---|
1 | Pancreas | p | Pepsin |
2 | Gastric glands | q | Enterokinase |
3 | Small intestine | r | Ptyalin |
4 | Salivary glands | s | Trypsin |
1. Pancreas: Produces Trypsin (s) (secreted as trypsinogen and activated by enterokinase)
2. Gastric glands: Secrete Pepsin (p) (secreted as pepsinogen and activated by HCl)
3. Small intestine: Produces Enterokinase (q) (which activates trypsinogen)
4. Salivary glands: Secrete Ptyalin (r) (salivary amylase that breaks down starch)
The correct matching is therefore: (1)-(s), (2)-(p), (3)-(q), (4)-(r)
Thus, the correct option is (B) (1) - (s), (2) - (p), (3) - (q), (4) - (r).
Pancreas: The pancreas is a vital organ located behind the stomach that plays a crucial role in digestion and blood sugar regulation. It produces digestive enzymes like amylase, lipase, and proteases, which help break down food in the small intestine. The pancreas also releases hormones such as insulin, glucagon, and somatostatin to regulate blood sugar levels, ensuring proper energy balance. Dysfunction in the pancreas can lead to conditions like diabetes or pancreatitis, affecting overall health.
Gastric glands: are specialized cells located in the lining of the stomach that secrete digestive enzymes and acids to aid in food digestion. These glands produce hydrochloric acid (HCl), which helps break down food and provides an acidic environment for pepsinogen to convert into pepsin, an enzyme that digests proteins. Additionally, gastric glands secrete mucus to protect the stomach lining from being damaged by the acidic environment. The glands consist of different cell types, including parietal cells (which secrete HCl), chief cells (which secrete pepsinogen), and mucous cells (which secrete mucus).
Small intestine: The small intestine is a long, coiled tube located between the stomach and the large intestine. It is responsible for the majority of digestion and nutrient absorption. The small intestine consists of three parts: the duodenum, jejunum, and ileum. In the duodenum, bile from the liver and digestive enzymes from the pancreas help break down food. The jejunum and ileum are primarily involved in absorbing nutrients such as carbohydrates, proteins, fats, vitamins, and minerals into the bloodstream. The inner lining of the small intestine has tiny finger-like projections called villi, which increase the surface area for absorption.
Salivary glands: are exocrine glands located in and around the mouth that produce saliva, a fluid that aids in digestion and mouth lubrication. Saliva contains amylase, an enzyme that begins the breakdown of starches into sugars, and mucus, which lubricates food for easier swallowing. Saliva also helps maintain oral health by washing away food particles and bacteria.
1. Pancreas: Produces Trypsin (s) (secreted as trypsinogen and activated by enterokinase)
2. Gastric glands: Secrete Pepsin (p) (secreted as pepsinogen and activated by HCl)
3. Small intestine: Produces Enterokinase (q) (which activates trypsinogen)
4. Salivary glands: Secrete Ptyalin (r) (salivary amylase that breaks down starch)
The correct matching is therefore: (1)-(s), (2)-(p), (3)-(q), (4)-(r)
Thus, the correct option is (B) (1) - (s), (2) - (p), (3) - (q), (4) - (r).