8.3 Cell Transport - East Tennessee State University
Lesson Overview 8.3 Cell Transport
Lesson Overview Cell Transport Passive Transport The movement of materials across the cell membrane without using cellular energy is called passive transport.
Lesson Overview Cell Transport Diffusion The process by which particles move from an area of high concentration to an area of lower concentration is known as diffusion. - form of passive transport - particles move down the concentration gradient
Lesson Overview Cell Transport Diffusion High Conc. Low Conc.
Lesson Overview Diffusion Cell Transport
Lesson Overview Diffusion Cell Transport
Lesson Overview Cell Transport Facilitated Diffusion Some molecules that cannot directly diffuse across the membrane pass through special protein channels in a process known as facilitated diffusion. - protein channels are molecule specific - form of passive transport - particles move down concentration gradient
Lesson Overview Cell Transport Osmosis: An Example of Facilitated Diffusion Osmosis is the diffusion of water through a selectively permeable membrane. - water moves down concentration gradient - passive
Lesson Overview Cell Transport Osmosis: An Example of Facilitated Diffusion Hypertonic - higher concentration of solute; low concentration of solvent (water) Hypotonic - lower concentration of solute; high concentration of solvent (water) Isotonic - equal concentrations of solute
Lesson Overview Cell Transport How Osmosis Works Hypotonic Hypertonic
Lesson Overview Cell Transport How Osmosis Works
Lesson Overview Cell Transport Osmotic Pressure The net movement of water in or out of a cell exerts a force known as osmotic pressure.
Lesson Overview Cell Transport Osmotic Pressure Because the cell is filled with salts, sugars, proteins, and other molecules, it is almost always hypertonic to fresh water. So if a cell is in fresh water, water tends to move quickly into the cell, causing it to swell or even burst.
Lesson Overview Cell Transport Osmotic Pressure In plants, the movement of water into the cell causes the central vacuole to swell, pushing cell contents out against the cell wall.
Lesson Overview Cell Transport Osmotic Pressure Cells in an isotonic solution experience no net gain or loss of water.
Lesson Overview Cell Transport Osmotic Pressure In a hypertonic solution, water rushes out of the cell, causing animal cells to shrink and plant cell vacuoles to collapse.
Lesson Overview Cell Transport Active Transport The movement of materials against or up a concentration difference is known as active transport. - requires energy (ATP).
Lesson Overview Cell Transport Active Transport active transport of small molecules or ions happens via transport proteins, or protein “pumps,” in the membrane. calcium, potassium, and sodium ions use this transport. - example: sodium potassium pump protein shape changes are important in the process.
Lesson Overview Cell Transport Active Transport: Bulk Transport Bulk Transport moves larger molecules and clumps of material across cell membranes. - requires energy (ATP) - forms: 1. endocytosis a. pinocytosis b. phagocytosis 2. exocytosis
Lesson Overview Cell Transport Endocytosis process of taking material into the cell by vesicles or vacuoles
Lesson Overview Cell Transport Endocytosis Types of endocytosis: 1. phagocytosis - cytoplasm extensions surround a particle and package it within a food vacuole. The cell then engulfs it. Amoebas eat this way. means “cell eating” 2. pinocytosis - cells form tiny pockets along the cell membrane. The pockets fill with liquid and pinch off to form vacuoles within the cell. means “cell drinking”
Lesson Overview Cell Transport Exocytosis membrane of a vacuole fuses with the cell membrane, forcing the vacuole contents out of the cell.
Diffusion Osmosis is the diffusion of water through a selectively permeable membrane. - water moves down concentration gradient - passive . Lesson Overview Cell Transport Osmosis: An Example of Facilitated Diffusion Hypertonic - higher concentration of solute; low concentration of solvent
Types of Transport There are 3 types of transport in cells: 1. Passive Transport: does not use the cell’s energy in bringing materials in & out of the cell 2. Active Transport: does use the cell’s energy in bringing materials in & out of the cell 3. Bulk Transport: involves the cell making me
of the cell and eventually divides into two daughter cells is termed cell cycle. Cell cycle includes three processes cell division, DNA replication and cell growth in coordinated way. Duration of cell cycle can vary from organism to organism and also from cell type to cell type. (e.g., in Yeast cell cycle is of 90 minutes, in human 24 hrs.)
UNIT-V:CELL STRUCTURE AND FUNCTION: 9. Cell- The Unit of Life: Cell- Cell theory and cell as the basic unit of life- overview of the cell. Prokaryotic and Eukoryotic cells, Ultra Structure of Plant cell (structure in detail and functions in brief), Cell membrane, Cell wall, Cell organelles: Endoplasmic reticulum, Mitochondria, Plastids,
Cell Transport : 19. word that means "cell" Name:_ Cell Transport Packet For questions 1-10, use Figure 1. Match the structure/process to the letter: 1. Phospholipid bilayer _ : 6. type of transport that does not require energy 8. solution the cell is placed in) .
Transport Management System of Nepal Nepalese transport management is affected by existing topographical condition of the country. Due to this only means of transport used in the country are road transport and air transport. In this paper only road transport is discussed. During the Tenth Plan period, the vehicle transport management
Jan 21, 2020 · pertaining to the cell theory, structure and functions, cell types and modifications, cell cycle and transport mechanisms. This module has seven (7) lessons: Lesson 1- Cell Theory Lesson 2- Cell Structure and Functions Lesson 3- Prokaryotic vs Eukaryotic Cells Lesson 4- Cell Types and Cell
Lesson Overview Cell Transport Passive Transport. . Active Transport. The movement of materials . against or up . a concentration difference is known as . active transport. . Bulk Transport moves larger mo
The Cell Cycle The cell cycle is the series of events in the growth and division of a cell. In the prokaryotic cell cycle, the cell grows, duplicates its DNA, and divides by pinching in the cell membrane. The eukaryotic cell cycle has four stages (the first three of which are referred to as interphase): In the G 1 phase, the cell grows.
