Embryology

Question 1

what is morbidity?

Answer 1

non-fatal health loss can be quick or condition that leads to a long term change
(Glasper et al, 2006)

Question 2

what is mortality?

Answer 2

deaths
(Glasper et al, 2006)

Question 3

what are the seven stages of life?

Answer 3

birth, infancy, early years, childhood, adolescence, adults, old people
(Glasper et al, 2006)

Question 4

how many pairs of chromosomes are there?

Answer 4

22 normal chromosomes and 1 pair of sex chromosomes
(Glasper et al, 2006)

Question 5

what is the genotype?

Answer 5

complete genetic make up of someones
(Glasper et al, 2006)

Question 6

what is the phenotype?

Answer 6

the way genes are expressed (eye colour, hair colour)
(Glasper et al, 2006)

Question 7

what is a dominant gene?

Answer 7

it over rules the recessive gene
(Glasper et al, 2006)

Question 8

what is a recessive gene?

Answer 8

only show their effect if the individual inherits two copies of the allele
(Glasper et al, 2006)

Question 9

what is bigger: sperm or ovum?

Answer 9

ovum
(Glasper et al, 2006)

Question 10

what is meiosis?

Answer 10

cell division where number of chromosomes are halved
(Glasper et al, 2006)

Question 11

what happens once the sperm penetrates the ovum?

Answer 11

fertilises it and combines their genetic material, so restores the 23 complemented pair chromosomes as the sperm and ovum only have 23 single chromosomes each
(Glasper et al, 2006)

Question 12

where does the zygote go after fertilisation?

Answer 12

moves from fallopian tube to lining of uterus (endometrium)
(Glasper et al, 2006)

Question 13

what happens once the embryo has implanted?

Answer 13

draws nutrition and support from mother, metabolising and growing
(Glasper et al, 2006)

Question 14

what are the three cell layers?

Answer 14

ectoderm (posterior), mesoderm (middle), anterior (endoderm)
(Glasper et al, 2006)

Question 15

what does the ectoderm form?

Answer 15

skin and nervous system
(Glasper et al, 2006)

Question 16

what does mesoderm form?

Answer 16

muscles, bones, circulatory system, reproductive system
(Glasper et al, 2006)

Question 17

what does the endoderm form?

Answer 17

digestive and respiratory system
(Glasper et al, 2006)

Question 18

what should be established by around 4 and a half months in the fetus?

Answer 18

nervous system, cortical and subcortical structures, major fibre pathways, neurones now produced
(Glasper et al, 2006)

Question 19

what does the neonatal brain need to continue developing once born?
(Glasper et al, 2006)

Answer 19

inputs from the environment relayed by the sensory systems

Question 20

why does the brain need to continue developing once born?

Answer 20

shapes development and learning of nervous system, is evident in physical, intellectual, language, and social development
(Glasper et al, 2006)

Question 21

when does the cardiovascular system form ?

Answer 21

from third week
(Glasper et al, 2006)

Question 22

when does the gastrointestinal system form?

Answer 22

when the endodermal sheet folds over and forms primitive gut in week 3- 4
(Glasper et al, 2006)

Question 23

where do the lungs develop from?

Answer 23

mesoderm and endodermal layers
(Glasper et al, 2006)