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Vaselesa [24]
3 years ago
14

According to Selye (1956, 1974), which stage of reaction to stress stimulates the body to send messages from the hypothalamus to

the glands and organs to prepare for potential defense needs?
Biology
1 answer:
Brums [2.3K]3 years ago
7 0

Answer:

The alarm reaction stage

Explanation:

According to Selye, there are three stages of reaction to stress conditions. These are namely the alarm reaction stage, the resistance stage, and the exhaustion stage.

The alarm reaction stage is the first stage of stress reactions which includes perception of stress conditions. The hypothalamus sends signals to the associated glands and organs to prepare for the defensive responses.

The adrenal gland receives a signal to secrete the stress hormones while organs such as the liver are signaled to increase the glucose formation which in turn would serve as fuel during stress conditions.

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The action of this rudimentary biological level of organization governs all physical and chemical processes in life. ___________
Sladkaya [172]

Answer:

Cell

Explanation:

Cell the essential membrane- bound unit that contains the key particles of life and of which every living thing are formed.

These cells collaborate with other specific cells and become the structure squares of huge multi cell living beings, for example, people and different creatures.

The levels of organization range from a single organelle all the way up to a highly structured hierarchy.cell governs all physical and chemical process in life.

8 0
3 years ago
Fill in the missing words. naturalselection foundereffect geographicallyisolated species evolution
grandymaker [24]

Hi!


The ancestral finch founded a new population on one of the Hawaiian Islands. Due to the founder effect , allele frequencies of the first small population on one of the islands could have differed from their continental goldfinch-like ancestors. The process of natural selection resulted in adaptation and evolution of the island population into a new species over time. Some of the birds crossed to some of the other islands where they were geographically isolated and evolved into more species occupying different niches.


In terms of population genetics, founder effect is when there is a loss of genetic diversity as a result of the establishment of a new population by a relatively few individuals. Following such an establishment, natural selection is the process  which results in the genes of the fittest individuals of the population being selected over generations. This process ultimately results in evolution, and over time may give rise to new species. Geographical isolation is the physical separation of a population from another owing to geographical changes in the terrain or area. If two populations of the same species are geographically isolated, there is a great chance over time they may evolve into two different species.


Hope this helps!

8 0
3 years ago
Which trait is most likely linked to having a bent wing in the fruit fly in the figure above?
sergij07 [2.7K]
It would be A. Vestigial Wing because of the vestigial genes that are carried by a fly, both have to be changed (a defect) to produce the bent wing shape.
5 0
3 years ago
Read 2 more answers
Why was it important to drop the ball from the same height three times? Why were the numbers
Savatey [412]

Answer:

It is important to do this to test your theory multiple times, so that you can see what effect the drop has on it when doing this multiple times. The numbers were slightly different because the recordings will not always be the same.

Explanation:

7 0
2 years ago
Tongue rolling is a dominant trait, following simple dominance. Mom can't roll her tongue but dad can. By looking at this pedigr
Shkiper50 [21]

Answer:

The correct genotype would be-

mom: homozygous recessive, father: heterozygous or homozygous dominant, and son : 50%(if father heterozygous dominant) to 100%( if father is homozygous dominant) chances of being hetrozygous dominant.

Explanation:

Listing the genes in the way that they indicates the real combination of alleles is the genotype of individual.

Ability to roll your tongue is a dominant character which has a dominant and a recessive gene. Assume that the dominant allele ‘R’ is for the ability to rolling tongue and the recessive allele ‘r’ for unable to rolling our tongue. As we know mother can not roll her toungue she must have homozygous recessive alleles that means she has two copy of recessive allele. The father could posess any combination of these alleles: RR (homozygous dominant), or Rr(heterozygous dominant).

Thus, the correct genotype would be

mom: homozygous recessive, father: heterozygous or homozygous dominant, and son : 50%(if father heterozygous dominant) to 100%( if father is homozygous dominant) chances of being hetrozygous dominant.

8 0
2 years ago
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