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Daniel [21]
3 years ago
8

Which of the disorders below is characterized by destruction of the walls of the alveoli producing abnormally large air spaces t

hat remain filled with air during exhalation? A. emphysema B. pneumonia C. tuberculosis D. coryza
Biology
1 answer:
Nuetrik [128]3 years ago
3 0

Answer:

The correct answer is option A. emphysema.

Explanation:

Emphysema is a lung disease that causes shortness of breath. It is caused due to damage in alveoli is damage. These alveoli are the air sacs that help in gaseous exchange in the bloodstream and lungs.

Ruptured or weaken walls of the alveoli of the lungs produce air space that stays filled with air during exhalation, it is an abnormal condition that causes shortness of breath.

Thus, the correct answer is option A. emphysema.

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How is enthalpy used to predict whether a reaction is endothermic or exothermic?
Radda [10]

<u>Answer:</u>

<em>329.48 KJ/mol heat is released by the combustion of 2 molof methane</em>

<u>Explanation:</u>

The value of enthalpy determines whether the reaction is exothermic or endothermic. If the enthalpy change is positive, then the reaction is endothermic (heat or energy released) and if the enthalpy change is negative then the reaction is exothermic (heat or energy absorbed).

2CH_4(g)+4O_2(g) => 2CO_2(g)+4H_2O(g)

\Delta H \ reaction=[ 2(\Delta HfCO_2)+ 4(\Delta HfH_2O)]-[2(\Delta HfCH_4)+4(\Delta HfO_2)]

                            =2 ( -(393.5 KJ)/mol)-[2( -74.6 KJ/mol)+4(-241.82 KJ/mol)]

                            = -787 KJ/mol-[ -149.2 KJ/mol-967.28 KJ/mol]

                           = -787 KJ/mol+1116.48 KJ/mol

                                          =329.48 KJ/mol

<em>In this question, </em><em>the enthalpy of formation</em><em> has positive value and hence the </em><em>reaction is endothermic</em><em> in which the heat is released. </em>

3 0
3 years ago
The graphic shows the citric acid cycle. A diagram of the citric acid cycle is shown. Acetyl C o A enters the citric acid cycle
vagabundo [1.1K]

Answer:

It enters the citric acid cycle and associates with a 4-carbon molecule, forming citric acid, and then through redox reactions regenerates the 4-carbon molecule.

Explanation:

Acetyl-CoA(2C) associates with oxalacetate(4C) to form citric acid(6C). Then through redox reactions, CO2 molecules result from decarboxylation (COOH becomes R-(R1)CH-R2). And through dehydrogenation H2 molecules are incorporated in NADH+ in FADH2, resulting in the 4-carbon molecule at the beginning (oxalacetate). That's why it's called a cycle(Kreb's cycle or citric acid cycle)

3 0
3 years ago
Read 2 more answers
The marine biome _______. a. is a large ecosystem, but not larger than some terrestrial ecosystems b. is characterized by four d
Solnce55 [7]

Answer:

B) is characterized by four different zones

Explanation:

edge 2020

7 0
3 years ago
Read 2 more answers
Which is the purpose of transfer RNA?
ale4655 [162]
D is the right answer
7 0
3 years ago
Read 2 more answers
5) A white flower is crossed with a homozygous red flower (red is dominant).
kondaur [170]

Answer:

The Punnett square will look like this:

Rw Rw

Rw Rw

Explanation:

In order to have a white flower, both alleles must be recessive. A homozygous red flower must have two dominate alleles.

Well use (w) for white, and (R) for red.

The parent alleles are:

1 - ww

2 - RR

(see picture)

6 0
3 years ago
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