Answer: B) It controls the autonomic nervous system and regulates hunger and thirst sensations.
1. Hypotonic solution; a solution that has lower salt concentration than the solvent concentration inside the cells.A hypotonic solution has more solvent than the solute, therefore, when a cell is placed in a hypotonic solution it gains water through osmosis and increases in size. However, for an animal cell, it will increase in size and then bursts because it lacks cell wall.
2. Isotonic solution is the solution with the same slat concentration as the solvent concentration. In a isotonic solution, the solute concentration and the solvent concentration are at equilibrium, hence if a cell is placed in a such a solution there will be not net change or effect on the cell.
3. Osmosis is the diffusion of water across a semipermeable membrane. Osmosis involves the movement of water molecules from a region of high concentration to a region of lower concentration through a semipermeable membrane. An example of osmosis is the intake of water molecules in the plants through the roots.
4. Phagocytosis is the process where cells eat other cells or large substances. Phagocytosis involves the mechanism by which cells or phagocytes binds to a cell or an item it wants to engulf on the cell surface. For example; when a macrophage ingests a pathogen, the pathogen becomes trapped in a phagosome which then fuses with a lysososme and destroys the pathogen by digesting.
5. A phospholipid is a molecules with a polar and a non polar ends, that along with protein makes up the plasma membrane. Phospholipid is a class of lipids that consists of two hydrophobic fatty acid tails and a hydrophilic head consisting of a phosphate group. It is the main component of the cell membrane, and makes the membrane to have a selective permeability.
6. Pinocytosis is the process where cells eat small or dissolved substances. Pinocytosis is also known as fluid endocytosis; it is a type of endocytosis where small particles that are suspended in an extracellular fluid are brought into the cell by the means of invagination of the cell membrane, which cause the particles to be suspended in a vesicle.
7. A polar molecule is a molecule that has a partial positive and negative charges at each end. Polar molecules results from the polar bonds which comes from the difference in electronegativity between the atoms involved. Water is a good example of polar molecule because it has a partial positive charge on one side (hydrogen) and a partial negative charge on the other (oxygen).
8. A protein is a large complex organic molecules consisting of a large number of amino acids linked together by peptide bonds. They are usually long chains of amino acids or polypeptides, that are essentially molecules used in metabolic processes. They have a range of functions, which includes, repair and maintenance, source of energy, structural components, chemical messengers, among others.
Succession is important because it leads to mature and stable communities. The purpose of succession is for an ecosystem to reach balance state right after it is formed or after it is disturbed by man or some disasters. It will increase biodiversity and help to prevent the desertification.
<span>The circulatory system would fail, and the entire organism would suffer. Resulting in death most likely</span>
Answer:the following processes directly require ATP includes:
B (Release of cross-bridge (interaction) between actin and myosin.)
C (Movement of calcium ions back into the sarcoplasmic reticulum after contraction.)
Explanation:
Muscle contraction occurs in various parts of the body to ensure proper body functioning. This process requires the release of calcium ion and the use of ATP ( Adenosine Triphosphate) as source of energy at various levels for the process to take place. The distinct role of ATP in muscle contraction includes:
-ATP is directly required as it causes detachment from actin after power stroke when it binds at one of the reactive sites of myosin. This explains option B (Release of cross-bridge (interaction) between actin and myosin.)
-it powers the pump that transports calcium ions back into the sarcoplasmic reticulum after contraction. This explains option C (Movement of calcium ions back into the sarcoplasmic reticulum after contraction)
- it activates the myosin head so it can bind to actin and rotate by the action of ATpase enzyme.
