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A&P I - LAB # 2 & 3 > Organelles > Flashcards

Flashcards in Organelles Deck (35)
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1

Ribosomes

-small units that are not surrounded by a membrane and have two units
-SITES OF PROTEIN SYNTHESIS

2

Where are Ribosomes found?

-floating freely in cytosol
-bound to membrane of other organelles
-bound to nucleus

3

Peroxisomes

-contain enzymes chemicals produced by cellular reactions
-metabolize fatty acids
-synthesize phospholipids

4

Rough Endoplasmic Reticulum

-membrane enclosed sac that is studded with ribosomes.
-protein synthesis and modifies proteins made by ribosomes

5

Smooth ER

-lacks ribosomes
-lipid synthesis and detoxification reactions

6

Where does Golgi Apparatus receive proteins from?

Rough ER

7

Golgi Apparatus

Flattened sacs
-processes, modifies and sort products from vesicles sent by RER.

8

Lysosomes

-contain digestive enzymes that break down particles brought into the cells, old and worn out organelles or the cell itself

9

Centrioles

-composed of microtubules
-located in the centrosome

10

Nucleus

-directs the synthesis of proteins
-surrounded by the nuclear envelope which contains nuclear pores

11

Chromatin is and its contains?

-found within the nucleus
-a ball like mass of tightly coiled DNA and proteins, RNA and a nucleolus

12

Nuclear envelope

-double layer membrane that contains the nucleus

13

Nucleolus

-found within the chromatin which is in the nucleus
-contains Ribosomal RNA and site of ribosome synthesis

14

Phagocytes

immune cells

15

Diffusion

movement of a solute from an area of high concentration to low concentration
-passive process
-no energy required

16

Where does energy come from in difussion

concentration gradient

17

What increases rate of diffusion

-temperature
-particle size
-concentration gradient

18

Passive Transport

-Diffusion
-facilitated diffusion (carrier transport)

19

Active Transport

ATP Pumps

20

Osmosis

movement of solvent (water) from area of high solvent concentration to low solvent concentration

21

Hypotonic

Lower solute concentration than the cytosol

22

Cell Crenation

cell shrinks due to being placed in a hypertonic solution

23

Cell Lysis

cell swells and bursts when placed in hypotonic solution

24

Isotonic

same solute concentration on both sides of the membrane

25

4 Stages of Mitosis

1. Prophase
2. MetaPhase
3. Anaphase

26

Cell Cycle - 4 Phases

G1, S phase, G2 and M phase (mitosis)

27

G1

growth phase

28

G2

second growth phase

29

S phase

DNA replication

30

Interphase consists of

G1, S and G2 phases