2- Dynamic Cells: Molecules On The Move ✅ Flashcards Preview

Biology BC 3&4 > 2- Dynamic Cells: Molecules On The Move ✅ > Flashcards

Flashcards in 2- Dynamic Cells: Molecules On The Move ✅ Deck (65)
Loading flashcards...
1

Active transport

The passage of a substance across a cell membrane against the concentration gradient

2

Apoptosis

The process of cell regulated cell death, mainly done by lack of signalling to a cell.
Related to cancer in that when apoptosis fails and cells rapidly divide

3

Carrier proteins

Proteins that transport so lutes across the phospholipid bilayer of the plasma membrane by a change in shape of the protein.

4

Channel proteins

Proteins embedded in the phospholipid bilayer of the plasma membrane that, when open allow the movement of solutes into and out of the cell

5

Chromatin

The substance containing DNA, proteins, and some RNA, of which chromosomes are made

6

Chromosome

A structure containing proteins and a single DNA molecule that carries genetic information

7

Concentration gradient

The change in concentration of a substance over distance or across a membrane

8

Cytoskeleton

The network of microtubules and microfilaments found in eukaryotic cells

9

Differentially/semi/partially permeable

A quality of membranes to allow only certain kinds of particle through

10

Diffusion

The process of net passive movement of substances from a region of higher concentration to one of lower concentration

11

Endocytosis

The process where by particles enter an animal cell intact without passing through the structure of the plasma membrane

12

Endoplasmic reticulum

The system of membrane lined cavities in the cytoplasm of eukaryotic cells that is the site of protein synthesis

13

Eukaryotes

An organism that consists of cells containing distinct organelles including a nucleus, and other membrane bound organelles

14

Exocytosis

A process by which substances are removed from the cell

15

Extra cellular matrix

The material between the cells of multicellular organisms

16

Facilitated diffusion

The process whereby a substance is transported across the plasma membrane of a cell, using transport proteins that are specific to each solute transported but without the expenditure of energy

17

Fluid mosaic model

..

18

Golgi body/apparatus/complex

A membrane bound organelle of a cell comprising of stacks of four to ten disk shaped cisternae.

19

Hypotonic

A solution that is lower in solute compared to another

20

Hypertonic

A solution that is higher in solute compared to another

21

Intermediate filament

A group of protein filaments that make up one component of the cytoskeleton of eukaryotic cells, they form rope like bundles that provide tensile strength for the cell.

22

Isotonic

A solution with solute concentration equal to another solute

23

Lysosomes

A membrane bound vesicle of an animal cell that contains digestive & decomposing enzymes

24

Microfilament

A thread like structure made of protein that is involved in various from of cellular movements

25

Microtubules

Small tubules made up of protein tubulin; they are a major component in the cytoskeleton, that is maintaining cell shape

26

Non-self

Describes agents(cells organisms, substances) that are not recognised by the immune system as being part of the organism

27

Nuclear envelope

The membrane of phospholipids around the nucleus of the cell

28

Nucleolus

A dark staining sub-organelle found within the nucleus of the cells

29

Nucleus

An organelle bound by a double membrane found within eukaryotic cells

30

Organelle

Describes the structures within a cell that carry out specific functions