BIOS 251 Week 3 Lab; Cell Membrane and Transport

Natasha Ngong Chamberlain University College of Nursing BIOS 251: Anatomy and Physiology Lab Professor Zille May 26, 2024 Week 3 Lab: Cell Membrane and Transport This experiment aimed to understand cellular activities aided by examining cell membranes and transport using fluorescence microscopy. It enables us to see the dynamics and structure of cell membranes and the procedures involved in moving molecules across them up close. Knowledge of this is crucial to understanding the basic mechanics behind cellular activity. 2 observations I made two observations in the simulation: Aquaporins are a means of transporting water molecules as long as those molecules are transported by aquaporin against an electrochemical gradient. I also observed that some cell membranes selectively allow certain molecules and ions to pass through while it blocks others from doing so. Diffusion is a passive transport mechanism in which molecules move from a higher to a lower concentration until they are evenly distributed. Osmosis is a form of passive transport in which water molecules travel through a selectively permeable membrane. The movement occurs from a lower solute to a higher solute concentration until a balance is established. Facilitated diffusion is a form of passive transport that allows substances to flow across cell membranes using transport proteins. Active transport is a biological mechanism in which molecules move across a cell membrane across a concentration gradient from a low to a high concentration. Labels and functions 933970115244 Cell Structure Functions A Nuclear envelope It divides the contents of the nucleus from the cytoplasm while also providing the nucleus' structural foundation. B Rough Endoplasmic reticulum oversees protein production, including post- translational modifications, folding, and sorting. C Nucleolus It is the chromatin region within the nucleus where ribosomal subunits are produced. D Cytoplasm It houses and provides an ideal environment for cellular organelles. E Nuclear Pores They regulate substance transport between the nucleus and the cytoplasm. F Cell Membrane It protects the cell and monitors the chemicals that enter and depart it. It maintains the appropriate pathways of molecular transport from one cell to another. G Mitochondria It functions as the cell's powerhouse, producing most of its ATP (energy). H Microfilam