Living Environment Homeostasis

A small lizard spends the morning hours lying in the sunlight until its body temperature rises. Later on in the day, the lizard rests in a shady area until its body temperature cools. This type of behavior is important to

• maintain homeostasis

• detect variations

• attract mates

• obtain nutrients

Anhidrosis is the inability to sweat normally. If the human body cannot sweat properly, it cannot cool itself, which is potentially harmful. Anhidrosis most directly interferes with

• a feedback mechanism that maintains homeostasis

• an immune system response to harmless antigens

• the synthesis of hormones in the circulatory system

• the enzymatic breakdown of water in cells

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NGSS.HS-LS1-3

As blood glucose levels increase, hormones are released to return glucose levels to normal. This is an example of

• a nervous system disorder

• the synthesis of antibodies

• a stimulus and a response

• an antigen and antibody reaction

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NGSS.HS-LS1-3

Which statement describes a failure of homeostasis in humans?

• When activity in an individual increases, the body temperature rises and the individual sweats.

• As the concentration of carbon dioxide increases in the human body, the lungs begin to expel more carbon dioxide.

• A viral infection leads to a decrease in the number of white blood cells being produced in the body.

• After an individual gets a cut, certain chemical changes begin the healing process.

The diagram below represents changes that take place within the human body. The diagram represents

• cellular differentiation

• dynamic equilibrium

• gene interaction

• biological evolution

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The diagram below shows specialized plant cells that control openings called stomates. The proper function of these cells is vital to the survival of the plant because they regulate the

• rate of glucose use by root cells

• absorption of sunlight by leaf cells

• products of photosynthesis in the stem

• exchange of gases in leaves

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NGSS.MS-LS2-3

The diagram to the right represents a sequence of events that occurs in the human body throughout the day,

These events can best be described as an example of...

• an energy cycle

• recycling of inorganic materials

• a feedback mechanism

• a learned behavior

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NGSS.HS-LS1-3

Sailors in the past may have heard the greeting from a passing ship, “Avast ye scurvy dogs.” This greeting would be a reference to a disease known as scurvy, which is due to inadequate intake of vitamin C. Which row in the chart below correctly identifies the cause of this disease and a possible treatment for it?

• Row 1

• Row 2

• Row 3

• Row 4

Which life process is indicated by the arrows in the diagram of an amoeba shown to the right?

• digestion

• excretion

• fermentation

• transport

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NGSS.MS-LS1-2

NGSS.MS-LS1-7

Homeostasis

• allows for a wildly fluctuating internal environment

• is impossible in vertebrates

• is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation

• is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation

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