Answer: Option B
Explanation:
The glucose is the basic unit of energy. It is absorbed by the cells of the body. The glucose that is taken inside the body by the means of food is utilized to gain energy.
The glucose that is absorbed from the food moves to interstitial spaces before going inside the cell.
100% of the glucose is transferred from the interstitial spaces of the cell to the inside of the cell.
This is because more amount of the glucose is still outside the cell as it is absorbed completely.
The Red Blood Corpuscles in the blood take up the oxygen to supply it to different cells in the body. They do not have a nucleus to carry much oxygen and to go through the thinnest capillaries and narrow spaces. They do not have mitochondria so that they do not use up the oxygen or energy for themselves.
Answer: In the nuclei of atoms
Explanation:
There are 2 types of transport mechanisms that involve the movement of materials across the cellular membrane:
1. Passive Transport Mechanisms which is the movement of materials that does not require energy. Instead the movement relies on the permeability of the cell. Under this are three kinds of passive transport mechanisms:
a. Simple Diffusion:
- the movement of materials from a region of higher concentration to lower concentration. No external energy is necessary for the movement. The materials supply the energy themselves.
b. Facilitated Diffusion:
- This differs from simple diffusion because the movement is facilitated by proteins that make up the structure of the membrane. The proteins include channel proteins that allow ions and smaller molecules to cross the membrane. The other protein are the carrier proteins, which bind to materials like sugar molecules and move it across the membrane.
c. Osmosis:
- This is the diffusion of water across the membrane. Osmosis moves water from regions where there are more water molecules of water per volume to regions where there are less water molecules per volume.
2. Active transport on the other hand is a movement mechanism that requires energy. It uses the energy to send materials against the direction it is coming from through simple diffusion. This mechanism is used in a way to keep unwanted ions or other materials out of the cell.
