Answer:
The correct answer is: C. Active Transport.
Explanation:
Because Na+ and K+ are ions, which makes them <em>charged molecules</em>, they can only diffuse through the cell membrane when using specialized protein channels. This is called <u>facilitated diffusion</u> and is a form of passive transport because sodium and potassium move <em>following their gradients</em>, which are made of the difference in concentration between the inside of the cell and the outside of the cell. For example, potassium is highly concentrated inside the cell and poorly concentrated outside the cell, so potassium diffuses from the inside to the outside to even the concentrations.
But the question asks in which process Na+ and K+ move in and out of the cell SIMULTANEOUSLY, so the answer is actually <u>active transport</u>. Active transport is the opposite of passive transport. While passive transport occurs naturally and doesn't need ATP (energy) to happen, active transport needs ATP because it moves molecules AGAINST their gradient. One of the most famous and important structures involved in active transport is the Na+/K+ pump, which consists of a <em>specialized protein using energy to enter 2 potassium ions and take out 3 sodium ions at the same time</em>. This Na+/K+ is fundamental to maintain the gradients, which are important for the correct functioning of many cells.
B. Oases are sourced by springs and are regions where groundwater intersects the land surface.
Explanation:
The only true statement is that oases are sourced by springs and regions where ground water intersects the land surface.
- Oases are water bodies found in desert and arid areas.
- They are usually surrounded by fertile patches of soil.
- Oases forms when the land surface intersects the water table.
- They can also be fed by temporary surface water from nearby rivers.
Fossil remains have suggested that the region of the Sahara desert was once a lush green tropical region.
In present day, it is a desert with huge underground water reserves in aquifers.
Learn more:
Deserts brainly.com/question/6685795
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Answer:
Solar energy, geothermal energy, wind energy, hydropower, nuclear and fossil fuels
Explanation:
Various sources of energy are solar energy, geothermal energy, wind energy, hydropower, nuclear and fossil fuels. The various sources of energy consumption for the generation of electricity was 41% produce from coal, 22% natural gas, 11% nuclear, 16% hydro, 6% from other sources such as solar, wind, geothermal, biomass, etc and 4% from oil.
The lowest begins with the atom and the highest ends with the biosphere.
Answer:
The leukocytes are the main defenses of our body.
Explanation:
From the mother cell it will be a differentiation, from the mother cell to be a mother cell hematopoietic, this will turn into a lymphatic mother cell until it will be 3 different kinds of lymphocytes, the B, T and NK.
Lymphocyte B is the responsible for the inmune system based in antibodies and antigens, due to specific proteins.
Lymphocytes T, are the ones that come from the mother cell of the bone marrow. They are the responsible for the immunity against some illness like cancer.
Lymphocytes NK (natural killer) are the responsible for killing bad cells (like cancer cells) because they "eat" them in a phagocytosis process.
