Table of Contents
How can substances be transported?
Substances are transported passively down concentration gradients. Often, substances have to be moved from a low to a high concentration – against a concentration gradient. Active transport is a process that is required to move molecules against a concentration gradient. The process requires energy.
Which substances can pass through?
Some substances, such as gases and water, can pass across the membrane easily by diffusion. However, other substances, such as glucose, need to be transported across the cell membrane. This is why the membrane is partially permeable – it controls which substances can travel across it easily.
How does a substance travel in diffusion?
Diffusion occurs when particles spread. They move from a region where they are in high concentration to a region where they are in low concentration. Particles diffuse down a concentration gradient, from an area of high concentration to an area of low concentration.
How do you transport hazardous substances?
If possible, place hazardous materials within the vehicle’s trunk or cargo bed. Materials transported in a cargo bed should be made secure and be protected from the weather. If transporting more than one type of chemical, make sure incompatible chemicals are placed away from each other.
Which substances pass through the cell membrane?
Some small molecules such as water, oxygen and carbon dioxide can pass directly through the phospholipids in the cell membrane. Larger molecules such as glucose require a specific transport protein to facilitate their movement across the cell membrane.
What should be carried out by the transporter during transportation of hazardous substance?
Each vehicle shall carry first-aid kit, spill control equipment and fire extinguisher. HW transport vehicle shall run only at a speed specified under Motor Vehicles Act in order to avoid any eventuality during the transportation of HW.
What do you need to transport chemicals?
Chemical Transport On-Site Best Practices
- Always use secondary containment by placing bottle, jars, or other chemical containers in a tray or other carrier when moving chemicals on-site.
- Don’t carry trays containing hazardous chemicals by hand—use appropriate equipment, such as laboratory carts.