Cell Structure and Function Concepts

The video discusses the variety in cell shapes and sizes, explaining how the shape of a cell is related to its function. Examples include skin cells, neurons, red blood cells, and muscle cells. Some cells, like amoeba and white blood cells, can change shape. The video also covers cell sizes, from bacteria to the ostrich egg, emphasizing that cell size is related to function, not organism size.

What determines the shape of a cell?

• The color of the cell

• The function it performs

• The age of the organism

• The organism's size

Why are skin cells flat and rectangular?

• To absorb nutrients

• To produce energy

• To act as a protective covering

• To store fat

What is the primary function of the elongated shape of nerve cells?

• To transmit messages quickly

• To digest food

• To store water

• To produce hormones

How do muscle cells contribute to movement?

• By storing energy

• By contracting and relaxing

• By absorbing oxygen

• By producing sound

What is the role of guard cells in plants?

• To absorb sunlight

• To produce flowers

• To open and close pores for gas exchange

• To store nutrients

How does an amoeba move and feed?

• By swimming with fins

• By changing its shape and using projections

• By flying

• By rolling

What is the size range of a bacterial cell?

• 100 to 500 micrometers

• 10 to 50 centimeters

• 1 to 5 millimeters

• 0.1 to 0.5 micrometers

Which is the largest cell among living organisms?

• Red blood cell

• Human nerve cell

• Ostrich egg

• Bacterial cell

What is the relationship between cell size and body size?

• Depends on the species

• No relationship

• Directly proportional

• Inversely proportional

Why are nerve cells in both rats and elephants similar in shape?

• Because they are in the same environment

• Because they perform the same function

• Because they have the same color

• Because they are the same size