Biological Source of Senna Senna refers to several plant species belonging to the genus Senna within the legume family Fabaceae. The most commonly used species for medicinal purposes include Senna alexandrina (Alexandrian senna) and Senna angustifolia (Indian or Tinnevelly senna). These plants are native to North Africa, the Middle East, and South Asia. Chemical Constituents … Read more
Biological Source of Ispaghula Derived from the seeds of the Plantago ovata plant, Ispaghula, also known as psyllium, comes from an annual herb belonging to the Plantaginaceae family called Plantago ovata. It is native to the Mediterranean region and is cultivated in various parts of the world, including India, Pakistan, and parts of Europe, for … Read more
Laxatives are substances or medications that are used to promote bowel movements and alleviate constipation. They work by increasing the frequency or ease of stool passage, often by softening the stool or stimulating the intestines to move. Laxatives are commonly employed to relieve temporary constipation or to prepare the bowel for certain medical procedures. There … Read more
Neurotransmitters are chemical messengers that play a crucial role in transmitting signals across synapses in the nervous system. These signaling molecules transmit information from one neuron to another or from neurons to target cells (e.g., muscles or glands). Neurotransmitters can be classified based on various criteria, and each type has specific properties. Here’s a classification … Read more
A synapse is a specialized junction that allows communication between neurons or between a neuron and its target cell, such as a muscle or gland. Synapses play a critical role in transmitting signals within the nervous system. They can be classified based on various criteria, and each type has distinct properties. Here’s a classification and … Read more
Receptors can be classified based on various criteria, including their location, mechanism of action, and the types of signals to which they respond. Here’s a broad classification and an overview of the properties of receptors: Based on Location 1. Cell Surface Receptors: Integral Membrane Proteins: These receptors are embedded within and typically span the plasma … Read more
An action potential is a rapid and transient change in the membrane potential of a cell, particularly in excitable cells like neurons and muscle cells. This phenomenon is a key mechanism for transmitting signals within the nervous system and initiating muscle contractions. The process of an action potential involves a series of electrical events that … Read more
Electrophysiology is a specialized branch of physiology that focuses on the study of electrical properties in biological cells, tissues, and organs. This field examines how electrical signals are generated, transmitted, and regulated within living organisms. By analyzing electrical currents and voltage fluctuations, electrophysiology provides vital insights into the functioning of the nervous system, cardiac tissues, … Read more
Nerve fibers Nerve fibers, also known as axons, are the long, thread-like projections of nerve cells (neurons) that transmit electrical impulses and information throughout the nervous system. These fibers can be classified based on various criteria, and their properties vary accordingly. Here’s a classification and overview of nerve fibers based on different characteristics: Classification of … Read more
Neuroglia, or glial cells or simply glia, are a group of non-neuronal cells that provide essential support and protection for neurons within the nervous system. The term “neuroglia” comes from Greek, with “neuron” meaning nerve and “glia” meaning glue, reflecting the historical perception of these cells as a kind of glue holding the nervous tissue … Read more
