5. What is the main force that causes a protostar to become a star?

1 answer:

7 0

Stars begin to form from clouds of gas in space. The cold temperatures and high densities (compared to elsewhere in space, but would be considered a vacuum on Earth) of these clouds allow gravity to overcome thermal pressure and start the gravitational collapse that will form a star.

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Chronic exposure to nicotine desensitizes _______ receptors in the midbrain.

Nikitich [7]

<h2>Nicotinic ACh</h2>

Explanation:

They serve differing and regularly basic capacities all through the focal and fringe sensory systems, and have developing jobs in non-neuronal systems, .
The synapse acetylcholine (ACh) can direct neuronal edginess by following up on the cys-circle cation-leading ligand-gated nicotinic ACh receptor channels (nAChRs).
These receptors are broadly disseminated all through the focal sensory system, being communicated on neurons and non-neuronal cells, where they take part in an assortment of physiological reactions, for example, uneasiness, the focal handling of torment, nourishment consumption, nicotine looking for conduct, and psychological capacities.
In the mammalian cerebrum, nine distinct subunits have been discovered up to this point, which amass into pentameric edifices with much subunit decent variety; anyway the α7 and α4β2 subtypes prevail in the CNS.

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2 years ago

Connective tissues are made of different combinations of ground substance and fibers. As you compare slides of connective tissue

ASHA 777 [7]

The connective tissue is a type of the animal tissue which is developed from the mesoderm. This tissue is present between the other tissues. The composition of the different ground tissues vary based on the amount of fibers and ground tissue present in it. The connective tissue which is high in collagen fibers will be the strongest and toughest.

Hence, the answer is 'connective tissue high in collagen fibers'.

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2 years ago

hypothesize why the thickness of seafloor sediments increases with increasing distance from the mid-ocean ridge

goldfiish [28.3K]

As the plate moves from the ridge, sediments from erosion settle on the plate as it nears land.

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2 years ago

Some areas of the Earth receive more solar radiation than others. Which of the following results from the Sun's uneven heating o

Setler [38]

The tilt of the earth's axis, which essentially "turns" certain parts of earth so that some parts receive more direct sunlight

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