Question

Activity No. 1: Types of Transport Direction: Identify the transport mechanism which best explains the situation. ار 1. A white blood cell engulfs a bacterium as you fight off an infection. 2. Carbon dioxide (a small uncharged gas molecule) enters the lungs (where it is less con- centrated) from the blood (where it is more concentrated). 3. Cells of the stomach wall transport hydrogen ions through a ATP-dependent membrane protein to the inside of the stomach, producing a pH of 1.5. The pH of the cytosol (fluid inside the cells) of stomach wall cells is approximately 7. (Recall that a low pH means high hydrogen ion concentrations). 4. The lung cells of a victim who drowned in fresh water are swollen due to water entering the cells. 5. Salivary gland cells produce the enzyme salivary amylase and secrete it into the salivary ducts to be delivered to the mouth. 6. A Paramecium (a single celled organism) swims into an area of salty water. The Paramecium shrivels up as it loses water through its cell membrane. 7. Some bacteria use the energy of ATP to pump H+ out of their cells. They use the H- concentration gradient to drive the transport of sugars into the cell against their concentration gradients. What mechanism of transport best describes how the sugars are entering bacterial cells? 8. Some cells engulf droplets of extracellular fluid. What mechanism of transport would this be? Answer: 5. 1. 6. 2. 7. 8. 3. 7 4.​

Answer 1

Different organism and different cells use different sort of mechanism for transportation, here are some.

Explanation:

1. Phagocytosis is the process by which WBC also known as phagocytes ingest or engulf other cells or particles.
2. Diffusion is the process by which carbon dioxide enters the lungs from the blood.
3. Secondary active transport is the process used here by stomach cells to transport the H+ ions using ATP-dependent membrane protein.
4. Osmosis is the process that take place inside the lungs of the person who drowned in the fresh water due to pressure gradient.
5. Ion transport mechanism is used to transport the salivary amylase to mouth from the gland.
6. Osmosis happened between the paramecium and the salty water because of gradient difference.
7. Active transportation/facilitated transportation is taking place here because the transport of sugar is due to gradient pressure and no ATP is required.
8. Pinocytosis is the process by which droplets of extracellular fluid are ingested by some cells.