Zoe Bisco Science p. 106 Flashcards

Questions and Answers

Explain the difference between passive transport and active transport.

Passive transport doesn't require cell energy and active transport does.

What provides the energy that drives the sodium potassium pump?

ATP

What functions do carrier proteins perform in active transport?

They are involved in facilitated diffusion.

Explain the difference between pinocytosis and phagocytosis.

Pinocytosis involves the transport of solutes or fluids, while phagocytosis is the movement of large particles or whole cells. Signup and view all the answers

Describe the steps involved in exocytosis.

A vesicle moves to the cell membrane, fuses with it, and then releases its contents to the outside of the cell. Signup and view all the answers

How do endocytosis and exocytosis differ?

Endocytosis is the transport into the cell and exocytosis is the transport out of the cell. Signup and view all the answers

Study Notes

Passive vs. Active Transport

Passive Transport: Movement of substances across a membrane without the use of cellular energy.
Active Transport: Movement of substances against a concentration gradient, requiring energy in the form of ATP.

Sodium-Potassium Pump

Energy Source: Utilizes ATP to pump sodium (Na⁺) out of the cell and potassium (K⁺) into the cell.

Carrier Proteins in Active Transport

Facilitate the transport of substances across cell membranes.
Engage in processes like facilitated diffusion to move molecules that cannot directly cross the lipid bilayer.

Pinocytosis vs. Phagocytosis

Pinocytosis: A form of endocytosis that involves the uptake of fluids or small solutes.
Phagocytosis: A type of endocytosis for ingesting large particles or entire cells.

Steps of Exocytosis

Process: A vesicle containing substances moves toward the cell membrane.
Fusion and Release: The vesicle fuses with the membrane and releases its contents outside the cell.

Endocytosis vs. Exocytosis

Endocytosis: Involves the transport of substances into the cell, forming a vesicle around the ingested material.
Exocytosis: Refers to the process of expelling materials from the cell, where substances are packed into vesicles that fuse with the cell membrane.

Description

This quiz covers key concepts from Zoe Bisco's Science chapter on cell transport mechanisms. You will explore the differences between passive and active transport, the role of ATP, and the functions of carrier proteins in facilitated diffusion. Test your understanding of these essential scientific principles!