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elena-s [515]
3 years ago
6

Caffeine aids in the movement of calcium ions across cell membranes by both making it easier for the Ca2+ channels to open and b

y holding the channels open longer. How would the administration of caffeine to a muscle fiber affect its contraction?
Biology
1 answer:
Llana [10]3 years ago
8 0

Caffeine cause dose dependent prominent increase in force of contraction and period of contraction of muscle

<u>Explanation:</u>

Caffeine is widely used in foods and drinks. Its long time use can effect central nervous system include lethargy memory, sleep disorder and anxiety.

Increase in concentration of calcium ion will result increase number of power stroke and force for contraction.  However latent period and relaxation period are unaffected by caffeine. Increase in concentration of calcium ion will result increase number of power stroke and force for contraction.

Because of calcium ion release in skeletal muscle, caffeine causes peripheral manifestation such as hyper-reflexia, muscle twitching etc.

High amount of caffeine leads to increase in release of Ca2+ from sarcoplasmic reticulum. It increases tension development in single tetanic contraction and re-initiate maximum tension in fatigue single myofibre by restoring Ca2+ release from sarcoplasmic reticulum to non-fatigued levels.

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Which type of specimen must be chilled if testing will not be performed immediately?
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Urine Specimen must be chilled if testing will not be performed immediately.

<h3>What is Urine?</h3>

Urine is a liquid byproduct of human and many other animal metabolism. Urine travels from the kidneys to the urinary bladder via the ureters. Urine is discharged from the body through the urethra as a result of urination.

Many by-products of cellular metabolism, such as urea, uric acid, and creatinine, are nitrogen-rich and must be removed from the bloodstream. These by-products are excreted from the body through urination, which is the major way for excreting water-soluble compounds. A urinalysis can identify nitrogenous wastes in mammals.

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5 0
1 year ago
The female gametophyte develops in the ovule from diploid (2n) tissue that undergoes meiosis and eventually forms the haploid (n
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Megasporangium  tissue gives rise to the female gametophyte.

<h3>What is the name of the diploid tissue that gives rise to the female gametophyte?</h3>
  • Three of the four haploid megaspores worsen into antipodal cells interior the female gametophyte.
  • The central cell of the female gametophyte contains two cores that when fertilized gotten to be the endosperm.
  • Megasporogenesis alludes to the advancement of megaspores from the megasporocyte, the cell that experiences meiosis.
  • Meiosis of the megasporocyte core comes about within the arrangement of four haploid megaspore cores.
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3 0
1 year ago
Why would it be important for epidemiologists, scientists who study the spread of disease, to determine patient zero?
amm1812
It's important so that they know exactly where the disease started. Knowing who patient zero is helps them to identify who that person interacted with. From there, they can determine where the disease spread to. This will aid them in stopping the disease before it spreads any further.
8 0
3 years ago
One similarity between a eukaryotic cell and a prokaryotic cell is the presence of
Vladimir79 [104]

Explanation:

Both prokaryotic and eukaryotic cells have:

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4 0
2 years ago
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andrew-mc [135]

Answer:

Transcription and RNA processing (splicing)

Explanation:

Although Howard is almost right, the DNA sequence does not precisely relate to the protein sequence. First of all, the DNA is transcribed to an primary mRNA molecule. Bur before the mRNA is ready to be translated into an amino acid sequence, it must be processed into a mature mRNA.

This includes adding a 3' poly A tail, and a 5' cap, and importantly for this question, splicing.

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