Which ion is essential for the blood clotting process? MCQ with Answer and Explanation

Explanation:
Mutualism is a symbiotic interaction where both species benefit (+/+). Examples: Rhizobium-legume association, lichens, mycorrhizae, and oxpecker-rhino. Parasitism benefits one at the expense of the other (+/-), commensalism benefits one without affecting the other (+/0), amensalism harms one without benefit to the other (-/0). Mutualism is crucial for ecosystem functioning.

Explanation:
Lymph is interstitial fluid that has entered lymphatic capillaries. When lymph vessels are blocked (e.g., filariasis), lymph accumulates, causing swelling (lymphedema). Plasma is blood fluid, synovial in joints, serum is plasma without clotting factors.

Explanation:
Gastric Inhibitory Peptide (GIP), now more commonly called Glucose-dependent Insulinotropic Peptide, is an incretin hormone secreted by the K cells of the small intestine in response to the ingestion of food, particularly glucose and fats. Its name reflects its two main actions: 1) It inhibits gastric acid secretion and slows gastric emptying (the 'gastric inhibitory' effect). 2) In the presence of elevated blood glucose, it potently stimulates the beta cells of the pancreas to secrete insulin (the 'insulinotropic' effect), preparing the body to handle the incoming nutrients.