Unit 3: Homeostasis Review

What is Homeostasis?

• Homeostasis is the process of photosynthesis in plants

• Homeostasis is the ability of an organism or system to regulate its internal environment to maintain a stable condition.

• Homeostasis is only relevant in extreme environmental conditions

• Homeostasis is the ability of an organism to change its internal environment constantly

Answer explanation

Homeostasis is the ability of an organism or system to regulate its internal environment to maintain a stable condition.

What is Cellular Respiration?

• Cellular respiration is the process by which cells break down water molecules to produce energy.

• Cellular respiration is the process by which cells break down glucose and other organic molecules to produce energy in the form of ATP.

• Cellular respiration is the process by which cells break down carbon dioxide to produce energy.

• Cellular respiration is the process by which cells break down sunlight to produce energy.

Answer explanation

Cellular respiration is the process by which cells break down glucose and other organic molecules to produce energy in the form of ATP.

what is Osmosis?

• The movement of water molecules from a solution with a large concentration of water molecules to a solution that has a small concentration of water molecules through a semipermeable membrane

• The movement of water molecules from a solution with a small concentration of water molecules to a solution that has a large concentration of water molecules through a semipermeable membrane

• The movement of non-water molecules through a semipermeable membrane

Answer explanation

Osmosis is the movement of water molecules from a solution with a large concentration of water molecules to a solution that has a small concentration of water molecules through a semipermeable membrane.

Which of the following is not part of the body's way of exchanges gasses in the body?

• Lungs

• Kidneys

• Red Blood Cells

• Skin

Answer explanation

The correct choice is Skin because the skin is not part of the body's way of exchanging gases, unlike the Lungs, Kidneys, and Red Blood Cells which are involved in the process of gas exchange.

What is a feedback system?

• A feedback system is a system that ignores the output of a process.

• A feedback system is a system that amplifies the output of a process.

• A feedback system is a system that takes the output of a process and uses it to make adjustments to the process itself.

• A feedback system is a system that provides input to a process.

Answer explanation

A feedback system is a system that takes the output of a process and uses it to make adjustments to the process itself.

What is positive feedback?

• A process that has no impact on the output of a system by feeding part of the output back into the system as an input

• A process that maintains the output of a system by feeding part of the output back into the system as an input

• A process that increases the output of a system by feeding part of the output back into the system as an input, leading to amplification or growth.

• A process that decreases the output of a system by feeding part of the output back into the system as an input

Answer explanation

Positive feedback is a process that increases the output of a system by feeding part of the output back into the system as an input, leading to amplification or growth.

What is negative feedback?

• A process that amplifies fluctuations or deviations from a desired outcome.

• A process that has no impact on fluctuations or deviations from a desired outcome.

• A process that only occurs in mechanical systems.

• A process that reduces fluctuations or deviations from a desired outcome.

Answer explanation

Negative feedback is a process that reduces fluctuations or deviations from a desired outcome, helping to maintain stability.

What is thermoregulation?

• Thermoregulation is the process of converting light into energy.

• Thermoregulation is the process of maintaining water balance in organisms.

• Thermoregulation is the process of cell division in organisms.

• Thermoregulation is the process by which organisms maintain a stable internal temperature.

Answer explanation

Thermoregulation is the process by which organisms maintain a stable internal temperature.

What does a hypotonic solution do to a cell?

• Causes water to move out of the cell, leading to dehydration

• Has no effect on the cell

• Causes water to move into the cell through osmosis, potentially leading to cell swelling and bursting.

• Causes the cell to shrink due to water loss

Answer explanation

A hypotonic solution causes water to move into the cell through osmosis, potentially leading to cell swelling and bursting.

What does a hypertonic solution do to a cell?

• It causes water to move out of the cell through osmosis, leading to cell shrinkage.

• It causes water to move into the cell, leading to cell swelling.

• It has no effect on the cell.

• It causes the cell to divide rapidly.

Answer explanation

A hypertonic solution causes water to move out of the cell through osmosis, leading to cell shrinkage.