, why do frogs need to keep their skin moist for proper respiration, and how does this affect their habitat preferences?(1 point)

Responses

To allow them to use their diaphragm muscles more effectively, leading them to dry areas.
To allow them to use their diaphragm muscles more effectively, leading them to dry areas.

To enhance their ability to yawn and take in more oxygen, making them prefer high altitudes.
To enhance their ability to yawn and take in more oxygen, making them prefer high altitudes.

To facilitate cutaneous respiration, which requires moist skin for oxygen and carbon dioxide exchange, making them prefer watery environments.
To facilitate cutaneous respiration, which requires moist skin for oxygen and carbon dioxide exchange, making them prefer watery environments.

To improve the function of their throat sacs, leading them to prefer forested areas.
To improve the function of their throat sacs, leading them to prefer forested areas.
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11 answers

The correct response is:

To facilitate cutaneous respiration, which requires moist skin for oxygen and carbon dioxide exchange, making them prefer watery environments.

Frogs primarily rely on cutaneous respiration, meaning they exchange gases (oxygen and carbon dioxide) through their skin. Moist skin aids in this process, so frogs tend to inhabit areas where they can keep their skin wet, such as near water sources.

how do special blood vessels in frog skin facilitate their unique respiratory process, and what might happen if their skin dries out?(1 point)
Responses

The blood vessels in frog skin allow them to yawn more effectively; if their skin dries out, they would yawn less.
The blood vessels in frog skin allow them to yawn more effectively; if their skin dries out, they would yawn less.

The blood vessels enable direct oxygen uptake and carbon dioxide release through the skin; if their skin dries out, cutaneous respiration would be impaired, affecting their oxygen intake.
The blood vessels enable direct oxygen uptake and carbon dioxide release through the skin; if their skin dries out, cutaneous respiration would be impaired, affecting their oxygen intake.

The blood vessels are essential for diaphragm muscle function; if their skin dries out, their diaphragm would fail.
The blood vessels are essential for diaphragm muscle function; if their skin dries out, their diaphragm would fail.

The blood vessels help frogs use their mouth muscles for breathing; if their skin dries out, they would only be able to breathe through their mouths.
The blood vessels help frogs use their mouth muscles for breathing; if their skin dries out, they would only be able to breathe through their mouths.
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The correct response is:

The blood vessels enable direct oxygen uptake and carbon dioxide release through the skin; if their skin dries out, cutaneous respiration would be impaired, affecting their oxygen intake.

Frogs have specialized blood vessels in their skin that facilitate the exchange of gases directly through the skin, a process critical for their respiration. If their skin dries out, this respiratory mechanism would be compromised, potentially leading to insufficient oxygen intake and an accumulation of carbon dioxide, which can be harmful or even fatal for the frogs.

Which of the following statements accurately describes a similarity between the circulatory systems of humans and frogs?(1 point)
Responses

Both humans and frogs have open circulatory systems.
Both humans and frogs have open circulatory systems.

Both humans and frogs have four-chambered hearts.
Both humans and frogs have four-chambered hearts.

Both humans and frogs have closed circulatory systems with pulmonary and systemic circulation
Both humans and frogs have closed circulatory systems with pulmonary and systemic circulation

Both humans and frogs mix deoxygenated and oxygenated blood in their hearts.

The correct response is:

Both humans and frogs have closed circulatory systems with pulmonary and systemic circulation.

Both species have a closed circulatory system, meaning that blood is contained within vessels, and they also have separate systems for circulating blood to the lungs (pulmonary circulation) and to the rest of the body (systemic circulation). However, it's worth noting that the heart structure differs: humans have a four-chambered heart, while frogs have a three-chambered heart, which leads to some mixing of oxygenated and deoxygenated blood.

how does the presence of only one ventricle in the frog’s heart affect its circulatory system?(1 point)
Responses

It allows for complete separation of oxygenated and deoxygenated blood.
It allows for complete separation of oxygenated and deoxygenated blood.

It causes mixing of oxygenated (blood with oxygen in it) and deoxygenated blood (blood without oxygen in it), making it harder for the body to get the oxygen it needs.
It causes mixing of oxygenated (blood with oxygen in it) and deoxygenated blood (blood without oxygen in it), making it harder for the body to get the oxygen it needs.

It prevents blood from being pumped to the lungs.
It prevents blood from being pumped to the lungs.

It enhances the efficiency of oxygenation compared to the human heart.

The correct response is:

It causes mixing of oxygenated (blood with oxygen in it) and deoxygenated blood (blood without oxygen in it), making it harder for the body to get the oxygen it needs.

In frogs, the presence of only one ventricle means that oxygenated and deoxygenated blood can mix within the heart, leading to less efficient oxygen delivery to the body compared to the complete separation found in the four-chambered hearts of mammals. This mixing can reduce the overall efficiency of oxygen transport in the frog's circulatory system.

Consider the differences in heart structure between frogs and humans. How might these differences influence the physical activity levels and endurance of each organism?(1 point)
Responses

The human heart's four chambers and double circulation probably support higher physical activity levels and greater endurance compared to the frog's three-chambered heart and incomplete double circulation.
The human heart's four chambers and double circulation probably support higher physical activity levels and greater endurance compared to the frog's three-chambered heart and incomplete double circulation.

The frog's heart structure allows for higher physical activity levels and greater endurance than the human heart.
The frog's heart structure allows for higher physical activity levels and greater endurance than the human heart.

Both heart structures support the same levels of physical activity and endurance.
Both heart structures support the same levels of physical activity and endurance.

The frog's heart structure supports higher endurance but lower physical activity levels compared to the human heart.
The frog's heart structure supports higher endurance but lower physical activity levels compared to the human heart.
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The correct response is:

The human heart's four chambers and double circulation probably support higher physical activity levels and greater endurance compared to the frog's three-chambered heart and incomplete double circulation.

The four-chambered heart of humans allows for complete separation of oxygenated and deoxygenated blood, providing more efficient oxygen delivery to tissues, which supports higher levels of physical activity and endurance. In contrast, the frog's three-chambered heart results in some mixing of blood, which is less efficient for sustaining high levels of activity and endurance.

How does the number of spinal nerves in humans compare to that in frogs?(1 point)
Responses

Humans have the same number of spinal nerves as frogs.
Humans have the same number of spinal nerves as frogs.

Frogs have more spinal nerves than humans.
Frogs have more spinal nerves than humans.

Both humans and frogs have 10 pairs of spinal nerves.
Both humans and frogs have 10 pairs of spinal nerves.

Humans have more spinal nerves than frogs.

The correct response is:

Humans have more spinal nerves than frogs.

Humans typically have 31 pairs of spinal nerves, while frogs have fewer pairs (usually around 10). This difference reflects the complexity and size of the nervous systems in the two species, with humans having a more complex structure suited for their advanced locomotion and functions.