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hram777 [196]
3 years ago
11

Help asap this is my last hope i need to turn this in tomorrow in the morning

Biology
1 answer:
Georgia [21]3 years ago
4 0
1.) Two changes are in the shape and function of the blood cells. Healthy RBCs (red blood cells) are biconcave and can stack, making them able to travel through narrow or curved passageways. However, individuals with sickle cell anemia have RBCs that are more rigid, making them difficult to travel through a lot of passages. Also, they die out more quickly and are more likely to cause blockages and rupture.
2.) As stated above, issues include organ damage due to lack of blood flow and filtration of toxic substances. Another issue, the worst result, is death. This can be caused by a lot of side effects. One can be the blood doesn’t get efficiently to or filter out of the kidneys.
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Following repolarization, the neuron may become slightly hyperpolarized before it re-establishes its resting membrane potential.
RoseWind [281]
<h2>Membrane potential </h2>

Explanation:

  • Membrane potential represents charge difference across the membrane, all biological cells are negative inside (cytoplasm) and positive outside (due to difference in ionic distribution)  
  • In a typical neuron cell membrane potential of cytoplasm is negative at rest (when no stimulus is applied) hence called resting membrane potential
  • Resting membrane potential of excitable cells is established by Na+ and K+pump
  • Repolarization starts with the efflux of K+ by the opening of voltage gated K+ channels
  • Voltage gated K+ channels starts to open when voltage gated Na+ channels becomes inactive
  • Hyperpolarization occurs due to excessive efflux of K+ by voltage gated K+ channels
  • Additional efflux of K+ occurs due to slow inactivation of voltage gated K+ channels
3 0
3 years ago
Why doesn't water become saltier when it comes down from the clouds
Julli [10]
The salt evaporates in the air thus when it hits the ground
7 0
3 years ago
PLEASE HELP?!! WILL MARK BRAINLY
saw5 [17]

Answer:

You just posted his one? Credit to: Vermont Legislative Research Shop

Explanation:

If you need extra resources: Lawn and garden chemicals, such as fertilizers enter the groundwater in two ways. In the first method, the chemicals can enter the groundwater by rainwater into a stream as runoff. This is especially problematic in urban environments where hard-surfaced roads allow rainwater to move over them without benefit of soil acting as a filter (Rosen and White, 1999). The water in streams replenishes groundwater, so the chemicals are absorbed into the groundwater as well. The second method of contamination is through leaching, which is the downward movement of a substance through the soil. The fertilizer may also dissolve into the surface water, which recharges the groundwater (Virginia Cooperative Extension, 1996).  Nitrate is highly soluble and readily leaches into groundwater. Water with over 10 parts per million nitrate-nitrogen can cause methemoglobinemia, an inability to use oxygen in infants. The nutrient phosphorus harms clear, free water by creating algal blooms. This process, known as eutrophication, turns the water green, clouds the water, causes odor problems, and depletes the oxygen for fish and other species, effectively suffocating them (Lake Champlain Basin, 1998).  To ensure that the groundwater does not get so contaminated as to be unhealthy, in 1986 the Department of Food and Markets implemented the Pesticide Monitoring Program. The goal of this program is to test wells in agricultural areas to help farmers learn about practices that prevent pesticides from leaching into the groundwater, and to conserve the nutrients in fertilizers and manure in the soil. This program is funded by fees taken from companies that sell pesticides and fertilizers in Vermont (Vermont Department of Agriculture, Food and Markets, 1998).

7 0
3 years ago
Where is RNA oxygenated?
Llana [10]

The correct answer to the question which is stated above is:<span>

</span>RNA has the oxygenated form of ribose sugar, while DNA has deoxygenated form of ribose sugar. 

<span>>The pentose, which is ribose, is </span>oxygenated<span> <span>in </span></span>RNA<span> <span>while in DNA it is deoxygenated</span></span>

4 0
3 years ago
What specific spinal nerve branch controls the movement of rectus abdominis
CaHeK987 [17]

Answer:

The correct answer will be-ventral ramus

Explanation:

Rectus abdominis is a skeletal muscle found in the front part of the body which begins from the sternum and ends at the pubic zone.

Rectus abdominis is also known as "Abs" which viewed externally appears to be six, eight or ten in number.

These muscles are innervated by the thoracoabdominal nerves which carry and transmit signals to CNS and to the muscles back. The main spinal nerve which controls the movement of Abs is known as the "ventral ramus".

Thus, ventral ramus is the correct answer.

7 0
3 years ago
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