mitosis
during which phase do the chromosomes line up along the middle of the cell?
metaphase
why is the main purpose of meiosis?
to produce gametes
what is the main function of the digestive system?
to break down food and absorb nutrients
what is the main function of the respiratory system?
gas exchange
what is the main purpose of the circulatory system?
transport oxygen, nutrients and hormones to cells
which structure pulls the sister chromatids apart?
spindle fibres
how many daughter cells are produced from one parent cell?
4
where does chemical digestion begin?
in the mouth
list the order of the air flow
nasal cavity - trachea - bronchi - bronchioles - alveoli
what are the 3 main types of blood vessels?
arteries, vessels and capillaries
how many chromosomes will each daughter cell have after cytokinesis?
46
during which phase of MEIOSIS 1 does crossing over occur?
Prophase 1
which organ produces bile and which organ stores the bile?(2)
produced in the liver and stored in the gallbladder
what happens to the diaphragm when you breath in?
the muscle contracts
what are the chambers of the heart?
the right atrium and right ventricle, the left atrium and left ventricle
name the mitosis phases in order
prophase, metaphase, anaphase, telophase
what is the term for the random alignment of homologous pairs at the metaphase plate?
independant assortment
what enzyme in the pancreas breaks down proteins?
trypsin and chymotrypsin
where does gas exchange occur?
alveoli
what component of blood is responsible for clotting?
platelets
which phase does the nuclear membrane break down and the chromatin condenses into visible chromosomes?
prophase
what is non disjunction?
when chromosomes fail to separate properly during cell division
what is peristalsis?
muscle contractions to help the food move
what is the flap that covers the trachea called?
epiglottis
what is the liquid part of the blood called?
plasma