Test One Flashcards
(33 cards)
How many sperm does a man produce per second?
over 1,00 sperm
How do the sperm find the egg?
in the fallopian tube, sense of smell, sniff their way to the egg
When does conception occur?
sperm nucleus and egg’s nuclues combine,, unique combination
Who determines the child’s sex?
the father, either X (girl), Y ( boy)
How many cells does a blastocyst have about day 5?
around 100 cells and separate into two sets, baby and placenta
What happens to the egg at day 1?
egg divides for the `1st time, makes entire copy fo genetic code
What are the inner cells fo the blastocyst called?
the embryo, stem cells
How are these cells unique?
they can turn into any type of cell and be any part of the body
At 3 weeks the top of the folded tube becomes what?
the head
What is the first organ?
the heart
What this organ forms what size is the embryo?
about the side of kidney bean
When does the baby’s body catch up to its head size?
won’t catch up until adolescence
What purpose does the yolk sac serve?
used briefly, generates nutrients and blood cells for growing embryo
What is an ultrasound?
peer into the womb, allows people and doctors to see growing baby
How many types of cells does the 3 month old fetus have?
over 200 types of cells, all organs have formed
What percent fo the fertilized egg survive?
only 50%
When does the fetus develop its own unique fingerprints?
at 5 months
What may change after the birth of the baby?
the baby will be able, eye color,
What can the baby hear while in the uterus?
yes, noises from moving, mother’s voice, music, loud noises, voices, hears mother voice differently
Can the baby see?
yes, but it is dark in the womb so they cant see much
Describe the baby at birth.
easier on mother if she is standing or squatting or sitting, 1) contractions start and water breaks, 2) baby born by pushing and contractions, 3) placenta is birthed
What are the five steps of the scientific method?
- Begin with curiosity
- develop hypothesis
- test the hypothesis
- draw conclusions
- report the results
Why is replication important?
shows validity and consistency in results
What basic question is at the heart of the nature versus nurture controversy?
How much of any characteristic, behavior, or emotion is the result of genes and how much is the result of experience?
