Answer:
The sodium-potassium pump is an active transporter because it needs to move sodium and potassium ions against the concentration gradient.
Explanation:
You have to think of it as outside vs inside the cell.
Outside the cell, you have 5mM K and 150mM Na. Inside the cell, you have 100mM K and 10mM sodium. Without the transporter then the ions would go from greater concentration to lower concentration. Energy keeps the ions going from the way they would naturally happen.
Answer:
B
Explanation:
The fatty acid tails of phospholipids are hydrophobic – meaning they are ‘water-hating’. This is why they are in the middle of the bi-lipid layer of the cell membrane 'hiding' from the 'watery' environment of a cell. This poses a challenge in the diffusion of large and charged molecules across the membrane -such as sodium ions. Such molecules need transmembrane protein channels to help them cross the membrane. These are called integral proteins because they are part and parcel of the cell membrane. The cell membrane, in addition, also has glycolipids and glycoproteins on its surface that are significant in the identification of the cell by other cells.
Answer:
germicide removal of microbes from a limited area
Explanation:
Antisepsis refers to the practice of using an antiseptic substance to remove or destroy disease-causing pathogens.
Virucides are chemical agents that aid in the deactivation or destruction of viruses.
Germicides are chemical agents that are capable of destroying germs with germs being harmful microscopic organisms.
Disinfection refers to the action of using chemicals to clean off or destroy bacteria from an area.
Considering the definition of each term above, the mismatched pair of all the terms is germicide -<em> germicide removal of microbes from a limited area.</em>
Germicide is a substance and not an action.
Answer:
Carbon dioxide (CO2) and water (H2O)
