Where does the oxygen and carbon dioxide get exchanged in the respiratory system?Question 7 options:






Answer 1




During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs. This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.

Answer 2
Answer: alveoli ; the exchange where oxygen and carbon dioxide takes place

Related Questions

a 50 kg box is pusher across the floor.if the acceleration of the box is 2.5m/s², what is the net force ecerted on the box​
Amir observes Wave 1 and Wave 2 crashing into each other at two different intervals. His experiments produce Wave 3 and Wave 4. Amir records his data in a table. What is the best statement about the data collected in Amir’s table?
NEED HELP QUICK!!!1). The Miconia plant is not a native plant to Hawaii. Since its introduction into Hawaii 40 years ago, it has become a popular decorative plant. However, this shallow-rooted plant has replaced many of the native deep-rooted plant species and increased the likelihood of landslides on the island. Which is one of the BEST methods of dealing with this invasive plant?A) The plant should be shared with the smaller islands.B) The plant should be fed to the native livestock on the island.C) The plant should be uprooted from all regions in the island.D) The plant should be cross-bred with deeper-rooted plants.2). In the Everglades, a system of canals and levees diverts water to urban areas and the Everglades National Park. This water management system has caused changes in the natural flow of the water during the wet and dry season. Wading birds are especially sensitive to wet and dry seasonal changes. How have water cycle disruptions MOST likely affected wading birds?A) The reduced salinity results in more eggs being laid.B) The water quality for feeding has been improved by runoff.C) The release of water dilutes food sources for their young.D) The higher water levels allow longer-legged birds to survive and reproduce.3). In Florida, humans have caused more than 2,000 manatee deaths since 1974. Collisions with boats and boat propellers cause roughly twenty-five percent of all manatee deaths. Another significant cause of the declining population is the disappearance of manatee habitats, resulting primarily from coastal development, water quality problems, and the change in water levels caused by Florida’s flood control systems. A constitutional amendment has been proposed that would protect natural systems and biological diversity. Which would be the MOST likely requirement of a constitutional amendment to protect the manatee population?A) moving manatees to locations outside of the EvergladesB) restricting manatee hunting in the Everglades to certain times of yearC) raising more manatees in captivityD) placing a limit on speedboat use in manatee habitats
What would happen to the pH of the blood if excessive amounts of acetoacetic acid built up, as in a case of untreated diabetes.
Why are certain amino acids defined as essential for human beings?

What is the time limit for the development of a residual condition?


The answer is there is no specific time limit.

Residual condition refers to the condition, which remains after the end of the acute phase of an injury or illness. It can also be described as a later effect occurrence. The residual conditions may take place at any time after an illness or an acute injury.

The late effect or residual conditions may include burn, abscess, crushing injury, tuberculosis, poliomyelitis, and fracture.

PLZ HELP ME1. The positively charged particle in an atom is the

a. neutron. c. proton.

b. ion. d. electron.

2. Two or more different atoms are combined in

definite proportions in any

a. symbol. c. element.

b. isotope. d. compound.

3. A covalent bond is formed by the

a. transfer of electrons. c. gaining of electrons.

b. sharing of electrons. d. losing of electrons.

4. When you shake sugar and sand together in a test

tube, you cause them to form a

a. compound. c. solution.

b. mixture. d. suspension.

5. A compound that produces hydrogen ions in

solution is a(an)

a. salt. c. base.

b. acid. d. polymer.

6. In polymerization, complex molecules are formed

by the joining together of

a. macromolecules. c. polymers.

b. carbohydrates. d. monomers.

8. Proteins are polymers formed from

a. lipids.

b. carbohydrates.

c. amino acids.

d. nucleic acids.

9. An enzyme speeds up a reaction by

a. lowering the activation energy.

b. raising the activation energy.

c. releasing energy.

d. absorbing energy.

10. In a chemical reaction, a reactant binds to an

enzyme at a region known as the

a. catalyst.

b. product.

c. substrate.

d. active site.



I wont be able to answer all of them but: 1. C

2. Compound


A positive charge is called a proton, no charge is a neutron and a negative charge is  a electron

When atoms are combined they are called a compound.

Hopes this helps you a bit.

A woman has a rare eyelid abnormality called ptosis, which makes it impossible for her to open her eyes all the way. The condition is caused by a dominant allele. The woman's father had ptosis but her mother was normal. Her father's mother also had normal eyelids.a. What are the genotypes of the woman, her father, and her mother? b. What proportion of the woman's children will have ptosis if she marries a man with normal eyelids?


If you keep in mind that a child gets one gene from the father, andanother from the mother, all should be fine.

a) starting with the father: since he is infected, he then has atleast one P. Knowing his mother wasn't, then her genotype was pp.Since he must have gotten one of her genes, then the father'sgenotype is Pp.
Since her mother had normal eyes, she must have had pp, because ifshe had even one P, she would have ptosis -since the allele isdominant-.
Since the woman is infected, and her mother is pp, then for thesame reasoning as her father, her genotype is Pp.

b) so this is a cross between Pp X pp. Draw your punnets square.There's a 50% chance that her children will have pp genotype thusno ptosis. 50% of her children will have ptosis with genotype Pp.

Final answer:

The woman with ptosis and her father have the genotype Pp, while her mother has pp. If she marries a man with normal eyelids (pp), there is a 50% chance that their children will inherit the dominant P allele and have ptosis.


The subject here is centered around genetics, specifically, a dominant genetic disorder called ptosis. The woman with ptosis would have a genotype of Pp, because she inherited one ptosis allele (P, for dominant) from her father and one normal allele (p, for recessive) from her mother. Hence, her father's genotype was also Pp, and her mother's was pp.

If the woman marries a man with normal eyelids (genotype pp), each child would have a 0.5 (or 50%) probability of inheriting the dominant P allele from the mother and thus, having ptosis. This is because each child will get a p allele from the father (since he can provide only that), and either a P or p allele from the mother with the probabilities being 50% for each. Hence, for these offspring, their potential genotypes can be Pp (ptosis) or pp (normal).

Learn more about Dominant Genetic Disorders here:



What are the 2 ways that you can do to enhance the
resolvingpower on the microscope?




The resolving power of the microscope is dependent upon the objective lens. It can be measured by the ability of the lens to differentiate between the two lines or points on the specimen under observation. The more the resolving power the smaller will be the distance between the two lines or points that can be distinguished.

The following are the two ways that can be used to enhance the resolving power on the microscope:

Using a lens that has a higher aperture.

Decreasing the amount of light being entered into the microscope that means using light of less wavelength.

DNA and RNA are both composed of nucleotides. However, RNA has three key differences. Please select thethree items that are unique to RNA.

1.Double stranded
2.Single stranded
3.Contains the nitrogen base Uracil in place of Thymine
4.Backbone contains the sugar ribose
5.Backbone contains the sugar deoxyribose
6.Contains the nitrogen base Thymine in place of Uracil



Three items that are unique to RNA are as follows:

2. Single-stranded.

3. Contains the nitrogen base Uracil in place of Thymine.

4. Backbone contains the sugar ribose.


Is a fox is a herbivore, carnivore,omnivore?


The answer is omnivores.
A fox is an omnivore meaning they eat both meat and vegetation. 

Hope this helps you! (: