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pickupchik [31]
3 years ago
6

What happens as a result of ion flow at a presynaptic terminal?

Biology
1 answer:
Anarel [89]3 years ago
7 0

The correct answer is: Release of neurotrasmitters from the synaptic vesicles  

Action potential travels through the membrane of the presynaptic cell causing the channels permeable to calcium ions to open. Ca2+ flow through the presynaptic membrane and increase the Ca concentration in the cell which will activate proteins attached to vesicles that contain a neurotransmitter (e.g. acetylcholine), Vesicles fuse with the membrane of the presynaptic cell, thereby release their contents into the synaptic cleft-space between the membranes of the pre- and postsynaptic cells.

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If the blood specimen from a dermal puncture is clotted before being mixed with the anticoagulant in the microcollection contain
kakasveta [241]

If the blood specimen from a dermal puncture is clotted before being mixed with the anticoagulant in the micro collection container, it will not be suitable for testing.

<h3>Why clotted blood cannot be used for testing?</h3>

In order to stop the loss of blood from damaged blood arteries, tissues, or organs, blood coagulation is a process where circulating components in the blood system are transformed into a gel with insoluble properties. The body creates a blood clot out of fibrin and platelets (thrombocytes) when a blood vessel (a vein or an artery) is wounded in order to stop further blood loss. Blood clots can still develop in the body even when no blood vessels are damaged. An embolus is a clot or a portion of a clot that separates and starts to move around the body.

Clotting has a negative impact on our automated hematology analyzer and unpredictably invalidates cell counts resulting in errors while testing.

To learn more about blood clotting visit:

brainly.com/question/11230651

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4 0
2 years ago
Which type of carbohydrate polymer is used for structural support in the cell wall within plants ?​
anygoal [31]

Answer:

Cellulose is a type of carbohydrate polymer is used for structural support in the cell wall within plants

Explanation:

Cellulose, for example, is a major component of plant cell walls, which are rigid structures that enclose the cells (and help make lettuce and other veggies crunchy). Wood and paper are mostly made of cellulose, and cellulose itself is made up of unbranched chains of glucose monomers linked by 1 4 glycosidic bonds

hope it will help you

3 0
2 years ago
For plants and other organisms to develop differences among their respective species the alleles of their genes must contain var
olasank [31]

A) <u>Mutation</u> is the original source of variations for plants and other organisms  which develops differences among their respective species

Explanation:

Genetic variation leads to the natural differences between each individual and among individuals of a species. The main cause for this variation is due to alleles that cause variations in the composition of genes or the DNA sequences.  

A mutation is a genetic variation which leads to the creation of a new allele in a species population. Each variation in the DNA sequence leads to an allele formation and each allele leads to a difference in character or trait between individuals since they are the alternate version of the original genes.  

Although genetic variations could be brought about by crossing over, random fertilization, or independent assortment; mutation is the original source because it provides the basic raw material for all the evolutionary changes.

8 0
3 years ago
An ice cube, a glass of cold water, and a swimming pool are each exposed to the samme amount of sunlight on a hot day. after fiv
Nikolay [14]
B, I think, because by saying that the ice cube has a lower heat capacity means that it cannot stead heat enough to last longer then the water and pool.
7 0
3 years ago
Hi i need help thank you
PSYCHO15rus [73]
Organisms that use the same resources because there may not be enough for all, so it then becomes a competition of who gets it and who doesn't.
5 0
3 years ago
Read 2 more answers
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