8. (F) Facilitated diffusion: For water to travel across the cell membrane at a substantial rate, the water molecules travel through protein channels known as aquaporins.
9. (S) Simple diffusion: While water molecules are polar, they are also very small. One fact not mentioned in the video is that some water molecules are able to squeeze directly through the phospholipid bilayer due to their small size.
10. (S) Simple diffusion: Charged ions are traveling through a cell membrane with the concentration gradient.
11. (A) Active transport: Cells lining the gut need to take in glucose, but at a certain time, the concentration of extracellular glucose is lower than the concentration already stored in the cells.
12.(F) Facilitated diffusion: At a certain time, glucose is in a high concentration outside of a cell and needs to travel through the membrane into the cell.
The above choices are made based on the basic definitions of active transport, facilitated diffusion and simple diffusion.
Active transport: The movement of the ions or molecules to a region having higher concentration across the membrane requiring the help of energy or enzymes is active transport.
Facilitated diffusion: This type of transport involves passive movement of the molecules or is a type of passive transport where the movement of the molecules takes place from higher to lower concentration region occurs with the aid of a carrier molecule such as a transport or carrier protein.
Simple diffusion: This process involves movement of ions or molecules from high concentration region to low concentration region through a semipermeable membrane.
<span>A symbiotic relationship in which one organism lives inside the other and both organisms benefit is the correct answer </span>
Answer: A factor that could adversely affect its success is the ice floes melting causing the polar bears to have to stay in the water longer and have to take the chance of the seals spotting them first or the chance of getting tired easily
Explanation:
<span>SNRI- Selective neurotransmitter reuptake inhibitor.
Drugs that have use this mechanism of operation can increase the presence of the targeted neurotransmitter in a subject as more of the neurotransmitter remains freely available. This class of drugs is commonly used in the treatment of depression and other maladies where neurotransmitter levels can affect subject outcomes.</span>
