Histology Block 1

Question 1

What stain gives the cell nucleus blue?

Answer 1

Hematoxylin

Question 2

What maintains membrane fluidity?

Answer 2

Cholesterol

Question 3

What carries out most membrane functions?

Answer 3

proteins

Question 4

Glycocalyx

Answer 4

carbohydrates (glycoproteins or glycolypids) associated with the cel membrane

Question 5

Nucleolus

Answer 5

synthesis site of rRNA

Question 6

Chromatin

Answer 6

DNA associated proteins

Question 7

Heterochromatin

Answer 7

Highly condensed DNA

Question 8

Euchromatin

Answer 8

Less Condensed DNA because its being actively transcribed

Question 9

What do high levels of euchromatin indicate?

Answer 9

Interphase (times of DNA transcription)

Question 10

Where does DNA get transcribed to mRNA

Answer 10

nucleus

Question 11

Where do proteins synthesized from FREE ribosomes go?

Answer 11

cytosol, nucleus, mitochondria

Question 12

Rough ER

Answer 12

Major Site of Protein Synth

Question 13

Golgi Apparatus

Answer 13

Flattened sacs, takes prots from RER and puts in transport vesicles. Packages and transports Prots for other purposes too

Question 14

Smooth ER

Answer 14

Lipid and Steriod Metabolism, Stores Calcium

Question 15

Mitchondria

Answer 15

Site of Krebs, Oxidative Phosphorylation, ATP production, Have own DNA

Question 16

Microfilaments

actin filaments

Answer 16

Under plasma membrane, help cell-cell attachment, mechanical support, cell movment, muscle contraction (w/ myosin)

Question 17

Intermediate Filaments

Answer 17

Provide structural support. Variable composition (e.g. keratin)

Question 18

Microtubules

Answer 18

hollow tubes, made of tubulin dimers, mitotic spindle, molecular motor proteins

Question 19

Centrioles

Answer 19

Non-membranous
9 triplet microtubules
Form part of Centrosome
Can replicate to make basal bodies needed for cilia and flagella