George is running a 5-km race and his cells need more oxygen. Which change will help his body meet the increased demand for oxygen? A. His heart beating more quickly. B. His pancreas releasing more insulin. C. His breathing becoming more shallow. D. His sweat glands becoming more active.

Answers

Answer 1

Answer:

Answer: A. His heart beating more quickly.

Explanation:

The physical activity like running increase the rate of heart beat and blood circulation in the body due to muscular activity. During running the body experiences the depletion of oxygen. Oxygen becomes the main requirement for cellular respiration during running. To meet the requirement of oxygen the heart pumps the blood faster so that the requirement in each cell get fulfilled through rapid blood circulation.

On the basis of the above explanation, A. His heart beating more quickly. is the correct option.

Answer 2

Answer: A. because the heart will pump more blood filled with oxygen to the muscles that need it most

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Answers

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Answers

Answer:

A mixture is a combination of two or more substances which are bound chemically. Identities of each substance is retained in the mixture.

Solid-solid mixture is sub-type of mixture which are formed by mixing two or more solids.

For example, soil (mixture of sand, silt, clay etc), gun powder (mixture of carbon, potassium nitrate, sulphur), etc.

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Concrete is a mixture of cement, lime, sand, rocks, and water.
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By 1863, control of most of the Mississippi River was in Union hands. To gain control of the last major port city serving as an open shipping door to the South, Grant weakened the enemy with a military campaign that lasted several months. First he isolated the port city by gaining control of the railroad, and then he began a seven-week artillery siege to force surrender.What is the port city described above?

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B. New Orleans
C. Vicksburg
D. Appomattox

Answers

The port city that is described in the excerpt is Vicksburg, Mississippi. The goal was to starve out the south by having control of the seaports and the river. The correct answer is C.

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Answers

The stimulant that is also referred to as crystal or crank and leaves the user feeling confused, shaky, and paranoid when it wears off is known as methamphetamine, or meth, for short. You may know about crystal meth if you ever watched the show Breaking Bad - the effects of using that drug can be seen there. Amphetamine is used for treating ADHD, narcolepsy, and obesity. Cocaine, or coke, is a recreational drug.

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Answers

the pancreas is considered a heterocrine gland because it has both endocrine and exocrine functions.

the pancreas functions as an endocrine gland by secreting glucagon and insulin

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