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3 years ago

The administration method that takes the longest time for the drug to reach the brain is __________.

1 answer:

4 0

Oral ingestion or swallowing is the administration method that takes the longest time for the drug to reach the brain. When using this method, the drug is swallowed through the mouth, moves to the stomach and then into the bloodstream before it can be transported to the brain. This means that it takes longer for a swallowed drug to start functioning than it does with other methods of administration such as injecting.

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Hatchetfish live in very deep parts of the ocean. What challenges must they overcome to survive in this environment?

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Which of the following lymph nodes can be palpated when they're normal size?

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what is a highly contagious viral infection of the brainstem and spinal cord that sometimes leads to paralysis

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2 years ago

In the short-term response to hemorrhage, ________ occurs.

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3 years ago

In some breeds of mice, yellow coat color is

Elis [28]

In the exposed lethal genes cause the individual's death during embryionic development before being born. H0m0zyg0us dominant individuals do not get born. Yellow: 2/3. Grey: 1/3. Phenotypic ratio: 2:1

<h3>What is complete dominance?</h3>

When the dominant allele completely masks the expression recessive allele, we talk about complete dominance.

This is the case of individuals that are heter0zyg0us for a particular gene and express the dominant trait.

The dominant allele is hiding the expression of the recessive allele.

<h3>What are the lethal genes?</h3>

Refer to genes that impede the normal development of the individual.

They can cause death during embryo development before the individual gets born,

They can cause the individual's death after being born and before reaching sèxual maturity.

Let us assume that mice color is coded by a single diallelic gene that expresses complete dominance.

Available data:

Yellow color is dominant over grey color.

Yellow is coded by the dominant allele Y
Grey is coded by the recessive allele y

Genotype YY → Yellow and lethal

Genotype Yy → Yellow

Genotype yy → Grey

The cross would be as follows,

Cross: Yy x Yy

Gametes) Y y Y y

Punnett square) Y y

Y YY Yy

y Yy yy

F1) Considering ONLY the successfully born individuals

Genotype

2/3 = 50% of the progeny is expected to be heter0zyg0us, Yy.

1/3 = 25% of the progeny is expected to be h0m0zyg0us recessive, yy.

Phenotype

2/3 = 50% of the progeny is expected to be yellow, Yy.

1/3 = 25% of the progeny is expected to be grey, yy.

The phenotypic ratio is 2:1

You will learn more about lethal genes at

brainly.com/question/13654244

brainly.com/question/14932405

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2 years ago