University:
California State University, Northridge
Course:
BIOL 100 | Introductory Biology
Academic year:

2023
Views:

20

Pages:

2
Author:

Mahmoud M.

Anatomy notes CELLS The human body is made up of cells and each cell maintains a homeostasis At the cellular level Each cell maintains its homeostasis Homeostasis - the ability and preference of some machinery to control relative changes . The internal state does not change in external conditions Cells are made up of molecules Cells are the smallest unit of life in the human body Cells can combine to form tissues They can unite in the form of body, body and body. Systems clusters combined forms organisms Have small cells called organelles Organelles keep the cell alive Not all cells have the same organelle Cells have three main components Plasma grip4 Barrier4 plasma grip4 barrier. Inside the cell is called the cytoplasm Cytoplasm - separates the fluid inside the cell from the fluid outside the cell Contains most of the organelles Nucleus - controls the activity of the cell Plasma membrane Yes very important 444 Organelles plasma membrane determines the size of the cell Contains the intracellular fluid (cytoplasm) separates it from the extracellular fluid The liquid interior of the plasma membrane containing water is called the cytoplasm The cytoplasmic fluid is the internal organ. The fluid (extra fluid) outside the brain is different from the cytoplasm. There are two types of proteins in the plasma membrane o Integral proteins cover the entire width of the plasma membrane, ie They call intracellular and extracellular fluids and bind to some Integral proteins are peripheral proteins Peripheral. Proteins are attached to the outer plasma membrane, exposed to the extracellular fluid or to the plasma membrane, to the cytoplasm Mechanisms of membrane transport Simple diffusion Active molecules across the plasma membrane. Consider mountains, but instead of altitude gradients, high-low, concentration gradients Molecules move from areas of high concentration to areas of low concentration by simple diffusion across the plasma membrane Simple diffusion is called a simple mechanism because it is not necessary. Each type of energy feedback that energy difference is created The bigger the difference, the faster the difference between molecules. .