Cell Structure and Function Concepts

The video explores the history of cell discovery, starting with Robert Hook's observations in 1665. It explains the development of cell theory, highlighting contributions from scientists like Schleiden, Schwann, and Virchow. The diversity of cells is discussed, emphasizing how their shapes relate to their functions. The video compares prokaryotic and eukaryotic cells, explaining the theory of endosymbiosis. Finally, it addresses why cells are small, focusing on surface area to volume ratios and efficiency.

Who was the first person to observe cells under a microscope?

• Theodore Schwann

• Robert Hooke

• Matthias Schleiden

• Isaac Newton

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

• Cells come from pre-existing cells

• All organisms are made of cells

• Cells are the basic unit of life

• Cells can arise spontaneously

What is the primary function of the elongated branches of a nerve cell?

• To send electrical signals

• To store nutrients

• To protect the cell

• To absorb light

How does the shape of red blood cells aid their function?

• Their round shape helps them roll through veins

• Their flat shape helps them cover more area

• Their elongated shape helps them send signals

• Their square shape helps them store energy

What is the main advantage of the flat and broad shape of skin cells?

• To absorb nutrients

• To cover and protect the body

• To send signals

• To store energy

Which type of cell lacks a nucleus and other membrane-bound organelles?

• Eukaryotic cells

• Prokaryotic cells

• Plant cells

• Animal cells

What theory explains the evolution of eukaryotic cells from prokaryotic cells?

• Natural Selection

• Spontaneous Generation

• Endosymbiosis

• Cell Theory

Which of the following is a characteristic of eukaryotic cells?

• Presence of membrane-bound organelles

• Lack of a nucleus

• Lack of mitochondria

• Smaller size compared to prokaryotes

Why are smaller cells more efficient at moving molecules in and out?

• They have more organelles

• They have a higher energy output

• They have a thicker cell wall

• They have a larger surface area to volume ratio

What is the surface area to volume ratio of a small cell with a surface area of 24 micrometers squared and a volume of 8 micrometers cubed?

• 4

• 3

• 2

• 1