Explain in a mechanistic manner how a disruption in cell membrane can affect life.

1 answer:

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Eukaryotic cells have been confronted throughout their evolution with potentially lethal plasma membrane injuries, including those caused by osmotic stress, by infection from bacterial toxins and parasites, and by mechanical and ischemic stress. The wounded cell can survive if a rapid repair response is mounted that restores boundary integrity. Calcium has been identified as the key trigger to activate an effective membrane repair response that utilizes exocytosis and endocytosis to repair a membrane tear, or remove a membrane pore. We here review what is known about the cellular and molecular mechanisms of membrane repair, with particular emphasis on the relevance of repair as it relates to disease pathologies. Collective evidence reveals membrane repair employs primitive yet robust molecular machinery, such as vesicle fusion and contractile rings, processes evolutionarily honed for simplicity and success. Yet to be fully understood is whether core membrane repair machinery exists in all cells, or whether evolutionary adaptation has resulted in multiple compensatory repair pathways that specialize in different tissues and cells within our body.

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1. What is the limiting factor for most animal life in the open ocean?

Minchanka [31]

Answer:

Biotic: Food availability

Abiotic: Temperature

Explanation:

There are two types of limiting factors for biodiversity: biotic and abiotic. Biotic refers to living things, for example, organisms that are an important food source. Most animal life forms in the ocean highly depend on the availability of a food source. If food is limited or scarce, the populations of a given species could face significant declines.

On the other hand, there are abiotic factors, which refer to factors that are not alive, such as physical factors. For instance, temperature and light. For marine organisms, temperature is a critical factor. Even an increase of 'only' 1 ºC could make a huge difference in the survival of a species as it could disrupt their ability to forage, hunt, or perform physiological processes, e.g. metabolism.

Therefore, if we refer to a biotic factor, food availability is a limiting factor for most animal life in the open ocean, whereas, if the refer to an abiotic factor, temperature (and light) are limiting factors for pelagic life.

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Large multicellular organisms are made of a wide variety of cell types. Do

Murrr4er [49]

Answer:

Yes, All of the cells divide at approximately the same rate, although they may divide at different times

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Serratia marcescens cells produce a red pigment at room temperature. The red color of the colonies is an example of which of the

Oliga [24]

Answer:

The red color of the colonies is an example of a phenotype .

Explanation:

Serratia marcescens -

They are the species ,that are , gram - negative bacteria , rod - shaped ,

they are from the family of Enterobacteriaceae .

Serratia marcescens are mostly found in the urinary and respiratory tracts of the hospitalized adults and in children , in the gastrointestinal systems .

S. Mercescens are most commonly found in the environment , growing the bathroom and dirt .

It is gram-negative, produces a reddish - orange tripyrrole pigment called the prodigiosin , is an example of phenotype .

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peoples choices can have a positive or negative effect on their health. describe one positive chocie and one negative health cho

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A positive choice to make to impact one's health is to simply wake up in the morning and get ready, and take time on yourself. That will ensure that you appreciate yourself and will give you a positive mentality throughout the day.

A negative choice to make to impact one's health is to constantly over-think situations, causing stress and an unhealthy state of mind.

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Where will RNA travel to after it leaves the nucleus? What important function happens at this new site?

andriy [413]

RNA travels to ribosomes, after leaving the nucleus, to perform translation and form amino acid with the help of tRNA

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