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DochEvi [55]
2 years ago
5

"botox injections smooth facial wrinkles because _____ is an acetylcholine antagonist that blocks the underlying facial muscles.

"
Biology
2 answers:
Lapatulllka [165]2 years ago
8 0

Answer:

Botulinum

Explanation:

Botox is used cosmetically to remove wrinkles and to treat certain muscular conditions. It is made from Botulinum neurotoxin obtained from the bacteria <em>Clostridium botulinum</em>. It is a very powerful neurotoxin but in Botox procedure it is used in extremely small concentration so it does not cause harmful effects. Botox process usually lasts for four to six months.

Botulinum acts as acetylcholine antagonist and inhibits the release of acetycholine neurotransmitter at the neuromuscular junction. This inhibits the signalling between motor neurons and facial muscles. As a result, the facial muscles are not able to contract and hence wrinkles are not formed on skin.

nevsk [136]2 years ago
5 0

Answer;

-Botulin

Explanation;

Botox injections smooth facial wrinkles because botulin is an ACh antagonist that blocks the underlying facial muscles.

-Botox injections are the best known of a group of medications that use various forms of botulinum toxin to temporarily paralyze muscle activity. This toxin is produced by the microbe that causes botulism, a type of food poisoning.

-These botox injections have the ability to reduce the appearance of some facial wrinkles. They are also used to treat such problems as repetitive neck spasms, excessive sweating, overactive bladder and lazy eye.

-Botulinum toxin acts by binding presynaptically to high-affinity recognition sites on the cholinergic nerve terminals and decreasing the release of acetylcholine, causing a neuromuscular blocking effect.

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1 dangerous mutations

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2 years ago
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A fly has two alleles for the color of its eyes. The green allele is recessive, and is represented by q. The blue allele is domi
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Answer:

p = 0.34

Explanation:

The green allele is recessive, meaning two copies of q (qq) are required to be green. Conversely, animals that are either pp or pq will be blue.

If 44 organisms are green, that means 44 are qq.

For genotype frequencies, the equation is:

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Which is denoted as

p² + 2pq + q² = 1

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To work out q, we can do \sqrt{0.44} = 0.66

For allele frequencies, the total must add up to 100%, so

p + q =1

We know that q= 0.66

So p = 0.34, because 0.66 + 0.34 = 1

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2 years ago
In 2000, Bob Harmon discovered the best-preserved Tyrannosaurus Rex skeleton ever found. The fossilized dinosaur was sticking ou
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An ecologist recorded 12 white-tailed deer, Odocoileus virginianus, per square mile in one woodlot and 20 per square mile in ano
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The population of white-tailed deer in the two habitats.

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Population is defined as the number of individuals per unit area. The unit area can be per hectare, acre, meter square, square mile, or any other acceptable unit for measuring the area of land.

<em>The ecologists identified two different woodlots and counted the population of white-tailed deer in the two. He must have been interested in comparing the population of the animals in the two habitats.</em>

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If, someday, an archaean cell is discovered whose rRNA sequence is more similar to that of humans than the sequence of mouse rRN
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Answer:

<h2>homoplasy</h2>

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