CH 8 Cell Structure & Function REVIEW 4 TEST

Who was one of the first people to identify and see cork cells?

• Theodor Schwann
• Robert Hooke
• Matthias Schleiden
• Rudolf Virchow

For normal nerve transmission in mammals, nerve cells maintain specific concentrations of potassium(K+) and sodium(Na+) ions. Concentrations of Na+ ions are normally higher outside the cell and lower inside the cell, while K+ ions are normally lower outside the cell and higher inside the cell. However, cell membranes are impermeable to Na+ and K+ ions. The diagram shows the relative concentrations of ions in solution inside and outside the cell. Which process describes how a nerve cell maintains homeostasis in regards to the Na+ and K+ ion concentrations?

• by converting the sodium ions present inside the cell into potassium ions
• by blocking both types of ions from moving into or out of the cell membrane
• by transporting both types of ions through protein pumps with the cell membrane
• by producing more potassium ions inside the cell and eliminating sodium ions as waste

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NGSS.HS-LS1-3

Which of the following is NOT a principle of the cell theory?

• Cells are the basic units of life.
• All living things are made of cells.
• Very few cells reproduce.
• All cells are produced by existing cells.

The cell theory applies to

• bacteria.
• plants and animals.
• multicellular organisms.
• all of the above

Which structure makes proteins using coded instructions that come from the nucleus?

• Golgi apparatus
• mitochondrion
• vacuole
• ribosome

Tags

NGSS.HS-LS1-1

Which organelle converts the chemical energy stored in food into compounds that are more convenient for the cell to use?

• chloroplast
• Golgi apparatus
• endoplasmic reticulum
• mitochondrion

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NGSS.HS-LS1-7

Which sequence below correctly traces part of the path of a protein in a cell being made?

• rough endoplasmic reticulum, Golgi apparatus, released from the cell
• ribosome, smooth endoplasmic reticulum, chloroplast
• smooth endoplasmic reticulum, lysosome, Golgi apparatus
• mitochondria, rough endoplasmic reticulum, cell membrane

Which organelle would you expect to find in PLANT cells but NOT in animal cells?

• mitochondrion
• ribosome
• chloroplast
• smooth endoplasmic reticulum

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NGSS.MS-LS1-6

NGSS.MS-LS4-2

Which of the following structures serves as the cell’s boundary from its environment?

• mitochondrion
• cell membrane
• chloroplast
• channel proteins

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NGSS.MS-LS1-2

The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of?

• carbohydrates
• lipids
• bilipids
• proteins