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4 years ago

What is neurilemma...explain citing its difference with Myelin Sheath

1 answer:

6 0

Neurilemma (also known as neurolemma, sheath of Schwann, or Schwann's sheath) is the outermost nucleated cytoplasmic layer of Schwann cells (also called neurilemmocytes) that surrounds the axon of the neuron. ... In the central nervous system, axons are myelinated by oligodendrocytes, thus lack neurilemma.

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How many grams of an 8% w/w progesterone gel must be mixed with 1.45 g of a 4% w/w progesterone gel to prepare a 5.5% w/w gel?

Nimfa-mama [501]

Answer: 0.87 g of an 8% w/w progesterone gel must be mixed with 1.45 g of a 4% w/w progesterone gel to prepare a 5.5% w/w gel.

Explanation:

According to the dilution law,

$C_1w_1+C_2w_2=C_3w_3$

where,

$C_1$ = concentration of ist progesterone gel = 8%w/w

$w_1$ = weight of ist progesterone gel = x g

$C_2$ = concentration of another progesterone gel = 4% w/w

$w_2$ = weight of another progesterone gel = 1.45 g

$C_3$ = concentration of resulting progesterone gel = 5.5%w/w

$w_3$ = weight of resulting progesterone gel = (x+1.45) g

$8\times x+4\times 1.45=5.5\times (x+1.45)$

$x=0.87$

Thus 0.87 g of an 8% w/w progesterone gel must be mixed with 1.45 g of a 4% w/w progesterone gel to prepare a 5.5% w/w gel.

4 0

4 years ago

1. The chemical formula for sodium bromide iş NaB. * True False

zheka24 [161]

The answer is False for sodium bromide it would be NaBr

3 0

3 years ago

A quantity of 0.0250 mol of a gas initially at 0.050 L and 19.0°C undergoes a constant-temperature expansion against a constant

KiRa [710]

Answer:

$V_2=2.995L\\\\W=248.5J$

Explanation:

Hello,

In this case, for us to compute the final volume we apply the Boyle's law that analyzes the pressure-volume temperature as an inversely proportional relationship:

$P_1V_1=P_2V_2$

So we solve for $V_2$ by firstly computing the initial pressure:

$P_1=\frac{nRT}{V_1}=\frac{0.025mol*0.082\frac{atm*L}{mol*K}*(19+273.15)K}{0.050L} =11.98atm$

$V_2=\frac{P_1V_1}{P_2}=\frac{11.98atm*0.050L}{0.200atm}\\ \\V_2=2.995L$

Finally, we can compute the work by using the following formula:

$W=nRTln(\frac{V_2}{V_1} )=0.025mol*8.314\frac{J}{mol*K}*(19.0+273.15)K*ln(\frac{2.995L}{0.050L}) \\\\W=248.5J$

Best regards.

4 0

4 years ago

I don't know how to transcribe the following DNA sequecne too rna

Llana [10]

Answer:

There is only one change when transcribing from a DNA sequence to a RNA sequence.

Explanation:

The change when transcribing is that instead of thymine (T) in a DNA sequence, you have Uracil (U) in a RNA sequence. The rest will stay the same. So, DNA has ATCG, whereas RNA has UACG. There should be NO thymine (T) in your RNA sequence–– it should only include the four of the following: UACG.

[FORMAT]: DNA is to RNA

A is to U (IMPORTANT, NO "T") –– Think as Apples Under the Tree

T is to A –– Think as Trees have Apples

C is to G –– Think as Car in the Garage

G is to C –– Think as Inside the Garage are Cars

3 0

3 years ago

Aqueous hydrochloric acid reacts with solid manganese(iv) oxide to form aqueous manganese(ii) chloride, liquid water and chlorin

maria [59]

4HCl + MnO₂ → MnCl₂ + 2H₂O + Cl₂

2Cl⁻ → Cl₂ + 2e⁻
MnO₂ + 4H⁺ + 2e⁻ → Mn²⁺ + 2H₂O

2Cl⁻ + MnO₂ + 4H⁺ → Cl₂ + Mn²⁺ + 2H₂O

7 0

4 years ago

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