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This formative assessment explores concepts of cell specialization, differentiation, and gene regulation. It's designed to test students' understanding of how genetic expression is influenced by internal and external factors.

Ɛhia

1

Which statement best explains why muscle and nerve cells in the same organism perform different functions?

They have different DNA.

They have different genes turned ON or OFF.

They copy DNA from other cells.

They gain new chromosomes during development.

Ɛhia

1

Select two statements that describe what occurs during cell specialization. (Choose 2.)

Certain genes are turned off while others turn on.

Every gene in DNA is used equally.

Cell structure changes to fit its function.

DNA sequences are permanently deleted.

Ɛhia

1

If oxygen levels decrease in the body, which event is most likely to occur first?

Bone marrow produces more red blood cells.

The kidneys release EPO.

The lungs slow down gas exchange.

The heart pumps less blood.

Ɛhia

1

Which two examples show external factors affecting gene expression? (Choose 2.)

Low oxygen at high altitude

High blood glucose levels in the body

UV light exposure from the sun increasing melanin

EPO signaling bone marrow stem cells

Ɛhia

1

A body cell exposed to high temperature begins producing heat-shock proteins that protect enzymes. What does this show about gene regulation?

Temperature can switch ON protective genes.

Heat removes unused DNA from the cell.

Temperature breaks down proteins permanently.

The cell stops all gene activity.

Ɛhia

1

Which statement describes how feedback maintains homeostasis?

Feedback increases changes until there is no balance within the body's systems.

Feedback detects change and triggers responses that restore balance.

Feedback increases mutation rates.

Feedback only works in one organ system.

Ɛhia

1

During exercise, which two groups of systems work together to maintain oxygen balance? (Choose 2.)

Circulatory and respiratory

Digestive and endocrine

Nervous and muscular

Circulatory and immune

Ɛhia

1

A genetic mutation causes kidney cells to NOT sense low oxygen. What will most likely happen?

EPO will still be released normally.

Bone marrow will make too many red blood cells.

Red blood cell production will decrease, decreasing oxygen delivery.

The feedback system will fix the mutation automatically.

Ɛhia

1

Which two outcomes occur when feedback regulation does NOT work? (Choose 2.)

Blood becomes too thick from too many red blood cells.

Oxygen levels stay balanced automatically.

Systems become unstable.

DNA stops making proteins permanently.

Ɛhia

1

A runner trains at high altitude for four weeks. When she returns to sea level, her body gradually reduces red blood cell count. Which statement best describes this process?

Positive feedback increases EPO levels indefinitely.

Negative feedback decreases EPO once oxygen levels rise.

Gene expression permanently changes in all cells.

The kidneys stop working once oxygen is restored.

Cell Specialization and Signals Test_25.26

Cell Specialization and Signals Test_25.26

Which statement best explains why muscle and nerve cells in the same organism perform different functions?

Select two statements that describe what occurs during cell specialization. (Choose 2.)

If oxygen levels decrease in the body, which event is most likely to occur first?

Which two examples show external factors affecting gene expression? (Choose 2.)

A body cell exposed to high temperature begins producing heat-shock proteins that protect enzymes. What does this show about gene regulation?

Which statement describes how feedback maintains homeostasis?

During exercise, which two groups of systems work together to maintain oxygen balance? (Choose 2.)

A genetic mutation causes kidney cells to NOT sense low oxygen. What will most likely happen?

Which two outcomes occur when feedback regulation does NOT work? (Choose 2.)

A runner trains at high altitude for four weeks. When she returns to sea level, her body gradually reduces red blood cell count. Which statement best describes this process?

Which statement best explains why muscle and nerve cells in the same organism perform different functions?

Select two statements that describe what occurs during cell specialization. (Choose 2.)

If oxygen levels decrease in the body, which event is most likely to occur first?

Which two examples show external factors affecting gene expression? (Choose 2.)

A body cell exposed to high temperature begins producing heat-shock proteins that protect enzymes. What does this show about gene regulation?

Which statement describes how feedback maintains homeostasis?

During exercise, which two groups of systems work together to maintain oxygen balance? (Choose 2.)

A genetic mutation causes kidney cells to NOT sense low oxygen. What will most likely happen?

Which two outcomes occur when feedback regulation does NOT work? (Choose 2.)

A runner trains at high altitude for four weeks. When she returns to sea level, her body gradually reduces red blood cell count. Which statement best describes this process?