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Flashcards in Physiology- Cellular Deck (27)
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1

Which organelle regulates and initiates all cellular activity?

nucleus

2

Which organelle is the site of synthesis of ribosomal RNA

nucleus

3

Which organelle is the site of energy production?

Mitochonria

4

Which organelle is the storage area for calcium?

Mitochondria

5

Which ER has ribosomes?

Rough ER

6

In which organelle does protein synthesis take place?

Rough ER

7

In which organelle does CHO, steroid and fat synthesis take place?

smooth ER

8

Protein containing vesicles leave the rough ER destined for which organelle?

Golgi apparatus

9

Which organelle modifies proteins by adding CHO to make glycoproteins?

Golgi apparatus

10

What is it called when a secretory protein granule moves to and fuses with the cell membrane?

exocytosis

11

What is the machinery of intracellular digestion of cellular debris called?

lysosomes

12

What are the names of particles that contain the machinery for translation of genetic code into protein?

Ribosomes

13

Where do peroxisomes originate?

from the smooth ER

14

What structures help distribute cell organelles, transport macromolecules within the cell and help shape the the cell during differentiation?

Microtubules

15

What is the name for microfilaments in muscle?

myofilaments

16

What organelle has a high concentration of oxidative enzymes?

Peroxisomes

17

What structure gives membrane its integrity?

Phopholipids

18

What substance regulates membrane fluidity?

Cholesterol

19

What does an increase in cholesterol do to the membrane fluidity?

decreases the fluidity of the membrane, making it hard and less permeable

20

Active transport requires what?

ATP

21

Facilitated transport requires what?

specific membrane transport proteins

22

How does a substance move in passive transport?

simple diffusion down its gradient

23

How does water move in osmosis?

from an area of low solute concentration to an area of high solute concentration

24

How do RBCs react to an isotonic solution?

no change in size

25

How do RBCs react to a hypertonic solution?

They shrink

26

How do RBCs react to a hypotonic solution?

They swell/burst

27

Large particles moving into a cell by invagination of the cell membrane is a process called:

Endocytosis/ Pinocytosis