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zvonat [6]
3 years ago
7

Describe the events by which depolarization of a smooth muscle cell results in contraction and explain why smooth muscle contrac

tions are slow and sustained.
Biology
1 answer:
antoniya [11.8K]3 years ago
5 0

Answer:

The depolarization of the smooth muscle cell membranes triggers the potential for contraction action, since the endoplasmic reticulum releases calcium in the intraplasmic zone, causing myosin and actin to unite, generating a sweeping movement and bringing the z lines of the sarcomero.

Smooth muscle contractions are more sustained over time by the distribution and type of muscle fiber, as they are more tapered.

Explanation:

The smooth muscle is that muscle that controls non-voluntary contractions, that is, controlled by the somatic nervous system, and is not related to locomotion but rather to involuntary movements such as intestinal motility, vascular contraction, etc.

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What would happen to our moon if gravity ceased to exist?
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Answer: A

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Without gravitational force Moon would move in

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The essence of meiosis is that a. specialized cell division reduces the chromosome number by half b. gametes are formed that are
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e. a and d are correct

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In beetles, the gene for color and the gene for pattern are located on the same chromosome and exhibit recombination. The lined
Pie

Explanation:

The genes that determine color and pattern are linked.

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  • Blue color allele (B) is dominant over aqua color (b)

<h3><u>Initial cross</u></h3>

Homozygous lined aqua beetle has the genotype <em>lb/lb</em>

It can produce only 1 type of gamete: <em>lb</em>

X

Homozygous solid blue beetle has the genotype<em> </em><em>LB/LB</em>

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The F1 is formed by the union of the parents' gametes, so it will have the genotype  <em>lb/LB</em>

<h3><u>F1 test cross</u></h3>

Test crosses involve a homozygous recessive individual.

<u>The homozygous recessive individual</u><u><em> lb/lb</em></u><u> can only produce 1 type of gamete:</u>

  • <em>lb</em>

<u>The F1 individual </u><em><u>lb/LB</u></em><u>  can produce 4 types of gametes:</u>

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What type of volcano forms over a weak spot in the Earth's plate, but not
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hot spot volcano

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