Answer:
The correct answer is: a. True.
Explanation:
There are several membrane transport systems responsible for the passage of ions like Na+ and K+.
Cell membranes are semipermeable, which means they can regulate which molecules may and cannot flow through them. Some molecules may simply drift in and out of a cell (this is called simple diffusion), while others require specific structures to enter and exit (this type of diffusion is called facilitated diffusion), and still, others require an energy boost to pass the cell membrane (this is known as active transport).
Both simple diffusion and facilitated diffusion are types of passive transport: they happen without the energy boost that ATP gives, unlike active transport.
In passive transport, molecules follow their chemical gradients and travel through the most concentrated compartment to the less concentrated one to equal the concentrations. In active transport, on the other hand, the cell makes an effort to enter or exit ions against their chemical gradients and this is done particularly to maintain said gradients (they are required for the correct functioning of the cell).
Sodium and Potassium are two of the most important ions when it comes to maintaining these gradients: sodium is very concentrated in the outside of the cells (the extracellular compartment), while potassium is highly concentrated in the intracellular compartment. These differences in concentrations are maintained thanks to the Na+/K+ pump, a form of active transport. Apart from the Na+/K+ pump, these ions go through the membrane through passive transport as well, without requiring energy.
2 daughter cells, 12 chromosomes each
mitosis maintains diploid number, only meiosis becomes haploid (half number of chromosomes)
Answer:
Fermentation
Explanation:
Fermentation is a catabolic, anaerobic process, which is not usually accompanied by electronic transport and whose final product is an organic compound. Yeasts are unicellular bodies (generally spherical in shape) with a size of around 2 to 4 μm and that are naturally present in some products such as fruits, cereals and vegetables. They are what are called: facultative anaerobic organisms, that is, they can develop their biological functions without oxygen. Yeasts carry out alcoholic fermentation. Its biological purpose is to provide anaerobic energy to unicellular microorganisms (yeasts) in the absence of oxygen, to dissociate glucose molecules and obtain the energy necessary to survive, producing alcohol and CO2 as fermentation waste.
The strongest pulse location was the Radial Pulse. The weakest pulse was the Dorsalis pedis
Dr. marshall demonstrated that gastric ulcers are caused by a bacterium by using Koch’s postulates.
Koch’s postulates are four standards created to confirm a causative relationship between a microorganism and a disease. Koch’s postulates were formulated in 1884 by Robert Koch and Friedrich Loeffler. Koch’s postulates include;
- the microorganism must be found in every cases of the disease.
- the microorganism must be isolated from the diseased host and grown in pure culture
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- the cultured microorganism must cause the disease when introduced into a healthy laboratory animal
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- the microorganism must be re-isolated from the new host and identified to be the same as the original causative agent
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