During exercise, an increase in heart rate is crucial for meeting the body's heightened demand for oxygen and nutrients. As muscles work harder, they require more blood flow to sustain energy production, and an elevated heart rate helps to pump oxygen-rich blood more efficiently throughout the body. This increase also aids in the removal of metabolic waste products like carbon dioxide and lactic acid. Ultimately, a higher heart rate during physical activity supports improved endurance and performance, contributing to overall cardiovascular health.
Why is it important for heart rate to increase during exercise? Answer in 3-5 sentences. (4 points)
9 answers
Photosynthesis occurs in a plant cell’s(1 point)
Responses
ribosomes.
ribosomes.
nucleus.
nucleus.
chloroplasts.
chloroplasts.
cell wall.
cell wall.
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Responses
ribosomes.
ribosomes.
nucleus.
nucleus.
chloroplasts.
chloroplasts.
cell wall.
cell wall.
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Photosynthesis occurs in a plant cell’s chloroplasts.
Which option is a light wavelength that chlorophyll does not absorb?(1 point)
Responses
yellow
yellow
violet
violet
green
green
red
red
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Responses
yellow
yellow
violet
violet
green
green
red
red
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Chlorophyll does not absorb green light.
During the process of Photosystem I, NADP+ is changed into NADPH. NADPH has a neutral charge. What reactants are necessary to form the product?(1 point)
Responses
an electron and a hydrogen ion
an electron and a hydrogen ion
an electron and two hydrogen ions
an electron and two hydrogen ions
two electrons and a hydrogen ion
two electrons and a hydrogen ion
two electrons and two hydrogen ions
Responses
an electron and a hydrogen ion
an electron and a hydrogen ion
an electron and two hydrogen ions
an electron and two hydrogen ions
two electrons and a hydrogen ion
two electrons and a hydrogen ion
two electrons and two hydrogen ions
The correct answer is an electron and a hydrogen ion.
Suppose you seal a house plant in a transparent glass container. What about the scenario would lead to the plant’s death?(1 point)
Responses
a lack of light
a lack of light
a lack of carbon dioxide
a lack of carbon dioxide
a lack of sugars
a lack of sugars
a lack of oxygen
a lack of oxygen
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Responses
a lack of light
a lack of light
a lack of carbon dioxide
a lack of carbon dioxide
a lack of sugars
a lack of sugars
a lack of oxygen
a lack of oxygen
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The correct answer is a lack of carbon dioxide. In a sealed environment, the plant would initially consume the available carbon dioxide during photosynthesis, but if it runs out, it would not be able to produce glucose and oxygen, which would eventually lead to its death.
1 answer