Cell Membrane Transport Flashcards Preview

SCT1 Physiology Module 1 > Cell Membrane Transport > Flashcards

Flashcards in Cell Membrane Transport Deck (21)
Loading flashcards...
1
Q

Membrane transport is either ________ or ________, depending on whether it requires energy.

A

ACTIVE
or
PASSIVE

2
Q

When no energy is needed to move a substance, it is called?

ie. diffusion, osmosis

A

PASSIVE PROCESSES

3
Q

When energy is needed to move a substance, it is called?

ie. active transport, transport in vesicles

A

ACTIVE PROCESSES

4
Q

What is a difference in the concentration of a chemical from one place to another referred to as?

A

CONCENTRATION GRADIENT

5
Q

The passive process of diffusion is described as the movement of molecules across the plasma membrane _______ their concentration gradient.

A

DOWN

6
Q

What is it called when both the solvent and the solutes move down their concentration gradients?

A

DIFFUSION

7
Q

Across the plasma membrane, molecules can either move straight through, in a process called ________ _________ or go through membrane proteins.

A

SIMPLE DIFFUSION

8
Q

What is it called when diffusion has a net movement of a solvent through a selectively permeable membrane?

A

OSMOSIS

9
Q

What is the passive movement of water across a selectively permeable plasma membrane from an area of high water concentration to an areas of low water concentration?

A

OSMOSIS

10
Q

Osmosis only occurs when a membrane is permeable to _______ and not to certain solutes.

A

WATER

11
Q

What is the movement of a substance across a membrane against its concentration gradient called?

A

ACTIVE TRANSPORT

12
Q

During active transport __________ is used/needed to ‘pump’ substance in or out of the cell.

A

ENERGY

13
Q

Name the active process which occurs in a small spherical sac?

A

TRANSPORT IN VESICLES

14
Q

During which active process is extracellular material brought into a cell in a vesicle formed by the plasma membrane?

A

ENDOCYTOSIS

15
Q

Name the form of endocytosis in which the cell engulfs large solid particles like bacteria, viruses, and worn-out cells?

A

PHAGOCYTOSIS

16
Q

During which active process are vesicles formed in a cell, fused to the plasma membrane, in order to release materials out of the cell?

A

EXOCYTOSIS

17
Q

Name the 3 types of cell junctions?

A
  1. TIGHT junctions
  2. ANCHORING junctions
  3. GAP junctions
18
Q

Which type of cell junction prevents the passage of substances between cells?

A

TIGHT JUNCTIONS

19
Q

Which type of cell junction anchors cells to one another?

A

ANCHORING JUNCTIONS

20
Q

Which type of cell junction provides channels to allow substances to pass between cells?

A

GAP JUNCTIONS

21
Q

Internal cell membranes (one-to-another) of the body are ____________.

A

ADJACENT