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sasho [114]
3 years ago
7

Receipt of extracellular signals can change cell behavior quickly (e.g., in seconds or less) or much more slowly (e.g., in hours

).
A.What kind of molecular changes could cause quick changes in cell behaviour?
B.What kind of molecular changes could cause slow changes in cell behaviour?
C.Explain why the response you named in A results in a quick change,whereasthe response you named in B results in a slow cha"
Biology
1 answer:
balandron [24]3 years ago
6 0

Answer:

A. Molecular changes such as extracellular signals on extracellular ligands can result in quick changes in cell behaviour. One example is insulin. Upon insulin binding on the receptor on the cell membrane, the cell release GLUT4 transporters (for muscle cells) to increase uptake of glucose.

B. Slow changes in cell behaviour can be observed for other lipophilic hormones or intracellular receptors such as glucocoortoid or estrogen which reacts with receptors in the cells.

C. Insulin is required to maintain a constant blood glucose level and hence levels of insulin has to be mediated in correspondence to the blood glucose levels. Fast acting signalling is thus required for homeostasis of blood glucose levels. Where for such lipophilic hormones such as steriods, glucocortoid, these hormones tend to have a longer lasting effect and hence results in a slow change.

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Volgvan
In this question, there are no options given to choose from. So i would answer this question based on my knowledge. The most likely cause of the observed variation is adaptation and evolution. The birds of that island adapted to the food source and then they evolved as per the requirement of the place and food source.
5 0
3 years ago
Tropical rainforest, temperate deciduous forest, and boreal forest (also called the taiga)
lorasvet [3.4K]
<span>Characteristics that mentioned biomes have in common are:
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- They all have big carbon sinks.

Still, trees different in a number of ways in these three biomes:
- </span><span>Tropical rainforest: Trees are evergreen and have large green leaves. Canopy is multilayered and dense, so there is a little light in the forests.
- </span><span>Temperate deciduous forest: Trees are deciduous, leaves are lost annually. Canopy is moderately dense, so there is more light than in tropical rainforests.
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3 0
3 years ago
The breeding of two organisms that differ in a single trait
Mariana [72]
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3 0
3 years ago
Social cognitive theory proposes that changing a behavior is a function of individual characteristics. True or False
sertanlavr [38]

Answer:

The answer is: False.

Explanation:

Social cognitive theory stands that portions of an individual's knowledge acquisition can be related to <em>observing others within the context of social interactions. </em>

When people observe a model performing a behaviour and the consequences of that behaviour, they remember the sequence of events and <em>use this information to guide subsequent behaviors</em>.

The theory says that people do not leatn new behaviours solely by trrying them and either succeding or failing, but upon the replication of the action of others.

I hope it works!

8 0
3 years ago
Are there any species that you know of that are now extinct? How might the world be different if they still existed on Earth?
spayn [35]

Answer:

the pinta giant tortoise

the ecosystem would be healthier in the area they come from

Explanation:

giant tortoises perform many critical roles in shaping healthy ecosystems, such as dispersing seeds of native plants and creating open pathways where other animals and plants can thrive.

good luck :)

hopefully, this helps

have a great day !!

8 0
3 years ago
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