exxammm Flashcards
detail the development of a pollen grain from a microscope mother cell?
the dioploid mother cell divides by meiosis , producing four haploid cells
the events that hqappen to a mature pollen grain following pollination up to double fertilisation
the pollen tube grows down the style , the generative nucleas then divides by mitosis into two haploid male gametes , both male gametes enter the embryo sac and one will fuse with the egg
give 2 adaptations of wind pollinated plants to increasek
stamen and stigma exposed to air
large amounts of pollen
give one difference between an endocrine and exocrine gland
exocrine glands have ducts but endocrine do not
location of the bowmans capsule?
cortex
location of loop of henle?
Medulla
main difference between plasma and filtrate? why is this so
plasma contains protein while filtrate does not. this is because protein is too big to pass thru the golmelular wall
hormone secreted by the pituitary gland
fsh , adh
define endocrine
dructless or secretes products into the bloodstream
name of tissue that procudes insulin in the pancreas
islet of langerhan tissue
what does parathormone stimulate?
the release of calcium into the bones
where is the thymus located?
located behind the breastbone
what change occurs in the endometrium
in 1-5 days the endometrium sheds and between day 6-28 it thickens
name 3 hormones produced by the pituitary gland?
Gh , L.H , F.S.H
