Which layer of the Basement Membrane of epithelial tissues is produced and secreted by cells of the underlying connective tissue? (a) Reticular Lamina (b) Lamellar Lamina (c) Papillary Lamina (d) Basal Lamina

Answers

Answer 1

Answer:

(a) Reticular Lamina

The layer of the basement membrane of epithelial tissues that is produced and secreted by cells of the underlying connective tissue is (a) Reticular Lamina.

The basement membrane is composed of two layers: the basal lamina, which is produced by the epithelial cells themselves, and the reticular lamina, which is produced and secreted by cells of the underlying connective tissue. These two layers together provide structural support and help anchor the epithelial tissue to the underlying connective tissue.

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What properties are those that describe what happens when a substance reacts with another substance? catalyst properties chemical properties physical properties mineral properties?

Answers

Answer:

Chemical properties,

Explanation:

Let us understand all the given terms

a) catalyst properties: this is the property of a substance by virtue of which it helps to modulate the rate of reaction, and itself remains unconsumed during the reaction (does not react). Example : enzymes

b) chemical properties: this is the property of a substance by virtue of which it reacts with another substance to give a new product of different structure, bonding, chemical and physical properties.

Example : hydrogen reacts with oxygen to give water.

So here the hydrogen is undergoing reaction with oxygen and this is chemical property of hydrogen.

c) Physical properties: This is the property which is related to the nature of a substance to exit in nature. for example hydrogen is a gas is its physical property not chemical.

d) mineral properties: It is again a kind of physical property.

............ chemical properties.........

Why does salt dissolve in water?

Answers

The water dissolves the salt because the water molecules are able to interact with the salt-forming particles, called ions. When the water Interacts with the trainers of the salt ions, the solid salt crystal structure Suffers breakdown, until the trainers of the salt ions are completely surrounded by water molecules. At this time the salt is fully dissolved by water.

hope this helps!

Write a balanced complete ionic equation for the following reaction: AgNO3(aq) + LiBr(aq) → AgBr(s) + LiNO3(aq)

Answers

Answer:

That is balanced.

Explanation:

Choose the pieces of evidence that supported the existence of Pangaea and continental drift theory.o Fossilized plants and animals of the same species found on separate continents.
o Geological features, such as mountain ranges, that align on matching coasts of different continents.
o Island arc ranges are still connected under the Atlantic Ocean.
o Antarctica's glacial features are similar to the Arctic's.

Answers

Pangaea is scientifically known as the original whole mass of land that eventually was divided into separate mass entities called continents as a result to natural phenomena like earthquakes. This is more explained inthe continental drift theory. After rigorous collection of evidences, scientists noticed that fossilized plants and animals of the same species, also with the coastlines match on different continents. The answers are the first and second choices (A and B).

Fossilized plants and animals of the same species found on separate continents.

Geological features, such as mountain ranges, that align on matching coasts of different continents.

Why does gold have a high melting point

Answers

Gold is a pure soft metal which has the atoms packed very loosely.

a mixture of oxygen, hydrogen, and nitrogen gases exerts a total pressure of 282 kpa. if the partial pressures of oxygen and hydrogen are 110 kpa and 106 kpa respectively, what is the partial pressure exerted by nitrogen?

Answers

Answer : The partial pressure of $N_2$ is, 66 Kpa

Solution :

According to the Dalton's law, the total pressure of the gas is equal to the sum of the partial pressure of the mixture of gasses.

$P_T=p_(N_2)+p_(O_2)+p_(H_2)$

where,

$P_T$ = total partial pressure = 282 Kpa

$P_(N_2)$ = partial pressure of nitrogen = ?

$P_(O_2)$ = partial pressure of oxygen = 110 Kpa

$P_(H_2)$ = partial pressure of hydrogen = 106 Kpa

Now put all the given values is expression, we get the partial pressure of the nitrogen gas.

$282Kpa=p_(N_2)+110Kpa+106Kpa$

$p_(N_2)=66Kpa$

Therefore, the partial pressure of $N_2$ is, 66 Kpa

pressures oxygen and hydrogen + pressure nitrogen

110 Kpa + 106 Kpa = 216 Kpa

Partial pressure:

total pressure - exerted by nitrogen:

282 Kpa - 216 Kpa

= 66 Kpa

hope this helps!

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What two-step process separated the cans into aluminum, steel, and tin?

When magnesium is added to hydrochloric acid, a gas is formed. Explain what happens in the reaction, how the gas is collected and how it could be tested to prove what it is.

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