Question

which statement best describes phagocytosis?
o a cells use this process to export products such as insulin
o b a cell engulfs a particle by wrapping pseudopodia around it and packaging it within a vacuole.
o c small droplets of extracellular fluid and all the dissolved solutes enter the cell by this process.
o d after entry, the endocytotic vesicle migrates to and fuses with the golgi apparatus.
question 4 (1 point)
endocytosis and exocytosis are examples of active transport
o true
o false

Explanation:

• For the first question:
• Phagocytosis is a form of endocytosis where a cell engulfs a particle. Pseudopodia (false - feet like extensions) are used to wrap around the particle and then it is packaged within a vacuole.
• Option a is about exocytosis (exporting products). Option c is about pinocytosis (small droplets of extracellular fluid entering). Option d is incorrect as endocytotic vesicles usually fuse with lysosomes (not Golgi apparatus).
• For the second question:
• Endocytosis (including phagocytosis and pinocytosis) and exocytosis require energy (ATP) as they move substances against concentration gradients or in bulk. So, they are examples of active transport.

Answer:

• First question: B. A cell engulfs a particle by wrapping pseudopodia around it and packaging it within a vacuole.
• Second question: True.