Unit 4 MT Studyguide

Which of the following best describes the process of active transport in cells?

• Movement of molecules from high to low concentration without energy

• Movement of molecules from low to high concentration using energy

• Movement of water across a semipermeable membrane

• Movement of molecules from high to low concentration using energy

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AL.HS.B.5.

A student is investigating the effect of temperature on enzyme activity. Which of the following steps should the student take to ensure the investigation is valid?

• Use different enzymes for each temperature

• Keep the pH constant while varying the temperature

• Change the substrate concentration for each trial

• Use a different enzyme concentration for each temperature

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AL.HS.B.5.

What happens to a cell placed in a hypertonic solution?

• The cell will swell and burst

• The cell will shrink

• The cell will remain the same size

• The cell will become isotonic

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AL.HS.B.5.

Explain how sweating helps maintain homeostasis in the human body.

• By increasing body temperature

• By decreasing body temperature through evaporation

• By absorbing heat from the environment

• By preventing water loss

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AL.HS.B.5.

Which of the following is an example of passive transport?

• Endocytosis

• Exocytosis

• Osmosis

• Sodium-potassium pump

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AL.HS.B.5.

A cell is placed in an isotonic solution. What will happen to the cell?

• It will swell

• It will shrink

• It will remain the same size

• It will burst

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AL.HS.B.5.

Design an experiment to test the effect of different concentrations of salt on the rate of osmosis in potato cells.

• Use the same concentration of salt for all trials

• Measure the mass of potato slices before and after placing them in different salt solutions

• Use different types of potatoes for each trial

• Change the temperature for each trial

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AL.HS.B.5.

Which feedback mechanism is responsible for regulating blood sugar levels in the human body?

• Positive feedback

• Negative feedback

• Neutral feedback

• Cyclic feedback

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AL.HS.B.5.

How does shivering help maintain homeostasis in the human body?

• By increasing body temperature through muscle activity

• By decreasing body temperature

• By absorbing heat from the environment

• By preventing water loss

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AL.HS.B.5.

What is the primary function of the sodium-potassium pump in cells?

• To transport water across the cell membrane

• To maintain a high concentration of sodium inside the cell

• To maintain a high concentration of potassium inside the cell

• To facilitate the diffusion of glucose

Tags

AL.HS.B.5.