The time it usually takes from infection until major opportunistic diseases occur is more than:

1 answer:

3 0

With reference to the transition from HIV to AIDS, modern research indicates that without treatment, it takes approximately 10 years from first infection of the HIV virus to full-blown AIDS, with major opportunistic diseases then occurring in this period as the individuals will have severely weakened immune systems making them more easily susceptible to major opportunistic diseases like pneumonia, tuberculosis and Salmonella infections.

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How does ATP enable transport proteins to move ions across a cell membrane?

Alekssandra [29.7K]

The ATP enables the movement of transport proteins to move the ions across a cell membrane by its getting fueled by its hydrolysis

<u>Explanation:</u>

The plasma membrane is a semi permeable membrane that is the movement of molecules across the membrane is constricted. There are 2 types of moment across the plasma membrane one is the active transport and the other is the passive transport. The active transport involves the help of ATP whereas the passive transport does not involve ATP to transport the materials.

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3 years ago

What is a change in a DNA sequence called

Shkiper50 [21]

Mutation. this happens when a cell copies its DNA to divide. its more common than you may think, a "typo" occurs every 100, 000 or so nucleotides, thats about 120, 000 "typos" every time a cell divides.

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2 years ago

By pairing the ringing of a bell with the presentation of meat, Pavlov trained dogs to salivate to the sound of a bell even when

Mama L [17]

Answer:

Unconditioned stimulus.

Explanation:

Classical conditioning may be defined as a type of learning procedure in which the biological procedure is used to pair up with the previous nerve stimulus. This stimulus result in the response of an individual.

The Pavlov experiment with the dog explains the process of classical conditioning. The ringing of bell (conditioned stimulus) is paired with unconditioned stimulus (meat presentation).

Thus, the meat presentation is unconditioned stimulus.

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3 years ago

What does transformation mean in biology?

saul85 [17]

Transformation is the genetic alteration of a cell resulting from the direct uptake of incorporation of exogenous genetic material from its surrounding through the cell membrane.

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3 years ago

Ao estudar para o vestibular, um candidato percebeu que ainda tinha dúvidas em relação aos processos de difusão simples, transpo

jasenka [17]

Answer:

O sal tem uma grande capacidade de absorver água do ambiente.

Explanation:

A passagem de oxigênio pelas guelras de um peixe é um exemplo de difusão porque a difusão ocorre quando a concentração de uma substância é maior em uma região e menor em outra região, de modo que as partículas se movem da região superior para a região inferior. A glicose entra na célula por meio do processo de transporte passivo facilitado porque passa por uma membrana semipermeável por uma proteína específica. O transporte iônico nas células nervosas é o exemplo do transporte ativo porque se move pelo uso da energia contra o gradiente.

O sal tem uma forte capacidade de absorver água do seu entorno, então quando a alface temperada com sal, o sal absorve a água presente no interior da alface, portanto a retirada da água é a retirada da água é a causa do murchamento.

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3 years ago