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amm1812
3 years ago
9

A cerebral hemorrhage may be caused by a localized weakness in a blood vessel wall that dilates and bursts. this weak section of

blood vessel is called a(n) _________
Biology
1 answer:
Artemon [7]3 years ago
8 0
This weak section of blood vessel is called an ANEURYSM. Aneurysm is defined as an excessive localized enlargement of an artery which is caused by the weakness of the artery wall. This weakness allows the artery to increase in size abnormally. 
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Proteins are polymers formed of structural units called.
Setler79 [48]
Proteins are made of hundreds and thousands of polymers called Amino Acid which are attached with each other in long chains. There are 20 different types of amino acids that make up a protein
4 0
3 years ago
How is diversity in a population created?​
Lemur [1.5K]

Answer:

I don't know what type of diversity, but I know genetic diversity

Explanation:

genetic diversity is controlled by 4 processes. mutation, drift, migration and selection. each of them have a analogue at the level of species. speciation creates new species much as mutation creates new alleles

4 0
4 years ago
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The production of protein molecules through transcription and translation
Tpy6a [65]
Transcription occurs in the nucleus of the cell. RNA polymerase breaks the hydrogen bonds and unzips a portion of DNA. RNA nucleotides match the DNA strand forming mRNA. In mRNA thymine is replaced by uracil. Once mRNA is formed it leaves the nucleus through a nuclear pore into the cytoplasm. The purpose of mRNA is to remove the protein code out of the nucleus without pulling the DNA out. mRNA then needs to find ribosomes in the cytoplasm which can be found on the rough ER. mRNA has read three bases at the same time and these are called codons. Ribosomes read the mRNA code and add the correct amino acid using tRNA. tRNA has an anti-codon on one end which will match a specific codon, and a specific amino acid on the other end. This will make translation happen. 

Translation- mRNA attaches to a ribosome and a start codon must be read. tRNA brings the first amino acid which matches the codon on mRNA. The next tRNA molecule moves in and matches with the codon on mRNA while amino acids form a peptide bond. First tRNA detaches itself and mRNA shifts for the next tRNA molecule to come in. Protein grows until a stop codon is reached and then it's ready to finish folding to become functional.
4 0
4 years ago
Skin nerve impulses initiated in mechanoreceptors are transmitted along which type of fiber?
Anettt [7]

Skin nerve impulses initiated in mechanoreceptors are transmitted along type B fiber

<h3>What are mechanoreceptors ?</h3>

These detect mechanical deformation e.g. touch or pressure within the skin; stretch receptors in muscles. * mechanoreceptor cells answer a change in the external stimulus (pressure, temperature, etc) by producing voltage pulses across neurons (i.e. generator potentials)

<h3>Where are mechanoreceptors found?</h3>

Mechanoreceptors are sensory neurons or peripheral afferents located within joint capsular tissues, ligaments, tendons, muscle, and skin. Four primary sorts of afferent mechanoreceptors are commonly present in noncontractile capsular and ligamentous structures in human joints: types I, II, III, and IV

<h2>What sends impulses from the skin?</h2>

First-order neurons receive impulses from skin and proprioceptors and send them to the medulla spinalis . They then synapse with second-order neurons. Second-order neurons sleep in the dorsal horn and send impulses to the thalamus and cerebellum

Learn more about skin nerve :

brainly.com/question/13869017

#SPJ4

6 0
2 years ago
Which sentence describes an example of sublimation
Drupady [299]
The common example of sublimation is shrinking of ice cubes that are not used in the freezer and conversion of dry ice rapidly into wispy clouds which vanish very soon
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3 years ago
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