rq - last minute for p3

Question 1

how would you calibrate the eyepiece graticule?

Answer 1

place stage micrometer on stage, line up with graticule and count the number of divisions on eye piece graticule that fit into micrometer

Question 2

describe what happens during the three stages of interphase

Answer 2

G1 = cell growth
S = DNA replication
G2 = further growth and prep for mitosis

Question 3

word equation for mitotic index

Answer 3

(no. of mitosis / total no. of cells) x 100

Question 4

give an example of antigen variability

Answer 4

influenza virus mutates very frequently, new flu vaccine created each year.

Question 5

What protein do Tc cells release?

Answer 5

perforin

Question 6

B cells have _____ on there cell surface membrane. When bound they can _____ pathogens.

Answer 6

antibodies. engulf

Question 7

three methods of gas movement in the tracheal system

Answer 7

• respiration
• contraction of abdominal muscles
• lactate lowers water pot of tracheoles, water into cells by osmosis, air form atmosphere into trachea

Question 8

fick’s law

Answer 8

(SA x gradient) x length = rate of diffusion

Question 9

exopeptidase…

Answer 9

hydrolyses peptide bonds between amino acids at TERMINAL end of polypeptide

Question 10

what enzyme hydrolyses ester bonds?

Answer 10

lipase, triglycerides into monoglycerides and fatty acids

Question 11

explain the action of bile salts during lipid digestion

Answer 11

emulsify lipids to form micelles, increasing surface area

Question 12

dilution series calculations

Answer 12

C1 x V2 = C2 x V2
V2 = V1 + distilled