Cell Structure and Function Cells are the fundamental units of life, divided into two main types: prokaryotic and eukaryotic cells. Prokaryotic cells lack a tru...
Cells are the fundamental units of life, divided into two main types: prokaryotic and eukaryotic cells. Prokaryotic cells lack a true nucleus and membrane-bound organelles, while eukaryotic cells possess these structures.
Cells can become specialized for specific functions within organisms. Microscopes are essential tools for studying cells, with light microscopes and electron microscopes providing different levels of detail and magnification.
Problem: The field of view diameter is 2.4 mm, and the actual size of the specimen is 24 μm. Calculate the magnification.
Solution:
Cell division is a crucial process that allows for growth, repair, and reproduction in organisms. Mitosis is the division of a single cell into two genetically identical daughter cells, involving distinct phases of the cell cycle.
Stem cells have the remarkable ability to differentiate into various specialized cell types. Their potential applications in regenerative medicine make them an area of active research.
The movement of substances across cell membranes is essential for cellular function. Transport mechanisms include:
Organisms exhibit a hierarchical organization, from cells to tissues, organs, and organ systems. In humans, major systems include the digestive, respiratory, circulatory, and others, each with specialized functions.
Plants have specialized tissues like xylem (transports water and minerals) and phloem (transports organic nutrients). Transpiration and translocation are key processes in the transport of water, minerals, and food throughout the plant.