8.0 extra exam flashcards

Question 1

unilocular adipocytes store

Answer 1

triglycerides (or lipid) for chemical energy

Question 2

difference between basement membrane and basal lamina

Answer 2

basement membrane = LM term

basal lamina = EM term

Question 3

what is the embryonic origin of the neural tube?

Answer 3

neural ectoderm

Question 4

embryonic origin of dorsal root ganglia

Answer 4

neural crest cells

Question 5

A 32 year old female who is having difficulty getting pregnant realizes that she is
several days late for her menstrual cycle. She decides to buy an over the counter
pregnancy test before contacting her physician. The substance excreted in her urine
that is likely to confirm the pregnancy is…

Answer 5

HCG human chorionic gonadotrophin

produced by syncytiotrophoblast

Question 6

hormone produced by syncytiotrophoblast of embryoblast

Answer 6

HCG

human chorionic gonadotrophin

Question 7

this is the hormone detected in urine pregnancy tests

Answer 7

HCG
human chorionic gonadotrophin
(produced by syncytiotrophoblast)

Question 8

Which of the following is typically associated with either (or both) of the striated
muscle types, and never with smooth muscle?
-myofibrils
-desmin
-caveoli

Answer 8

myofibrils
= repeating longitudinal length of sarcomeres
(smooth muscle has no sarcomeres)
-desmin is an intermediate filament present in all
-all muscles regulate Ca++ levels with caveoli

Question 9

You inject mesenchymal stem cells and examine the bone tissue that arises from
these cells. Which of the following cells would NOT be labeled?
a. osteoprogenitor cells
b. bone lining cells
c. osteoblasts
d. osteoclasts
e. osteocytes

Answer 9

osteoclasts
derived from monocyte precursors
-NOT mesenchyme like other bone cells

Question 10

The vast majority of air spaces in the lung are lined by a ____ epithelium

Answer 10

simple squamous

-thin to facilitate gas exchange

Question 11

primitive streak appears in week __ of development

Answer 11

week 3

Question 12

Week two of development is significant for the formation of _____ and _____ .

• two-layered disc……..full implantation of the embryo
• the bilaminar disc……… development of the primitive streak

Answer 12

two-layered disc……..full implantation of the embryo

(primitive streak develops in week 3

Question 13

full implantation of the embryo is completed in week __ of development

Answer 13

week 2

Question 14

You dream you are a fibroblast living in loose connective tissue. You are trying to
help nutrients diffuse to the overlying epithelium. What do you secrete to best fulfill
this requirement?
-proteoglycans
-type IV collagen
-multiadhesive glycoproteins

Answer 14

proteoglycans

-to increase hydration of matrix for diffusion

Question 15

3 types of neutrophil granules and their funcitons

Answer 15

primary - lysosomal
secondary - antibacterial
tertiary - cathepsins for migrating thorugh ct

Question 16

function of white fat

Answer 16

store triglycerides
shock absorption
heat insulation

Question 17

what junction confers strength to epithelium?

Answer 17

zonula adherens (wraps all the way around and binds actin)
-[desmosomes / macula adherens is only a spot weld]

Question 18

how do trapped osteocytes communicate?

Answer 18

through gap junctions on processes extended into canaliculi

Question 19

one of the only places woven bone found in mature adult

Answer 19

mandible

Question 20

do all cells in transitional epithelium touch basement membrane?

Answer 20

not known in scientific literature

just identify by umbrella cells

Question 21

which is more specific, type III collagen or endoneurium?

Answer 21

endoneurium