Nab Flashcards
How do red blood cells structures relate to their functions?
Large surface area makes it easy to carry more oxygen
How do sperms cells structures relate to their functions?
Tail makes it easy to swim towards egg. Mitchocondra is to provide energy
What are stem cells
Stem cells are UNSPECIALISED ANIMAL cells that are involved in GROWTH and REPAIR
How can stem cells be used to benefit humans
They can develop into specialized cells to replace lost/damaged cells
One ethical concern with the use of embryonic stem cells
Embryo nice stem cells are found in early embryos which means they could have been a human instead of being used for cells
What’s a cerebrums function
Largest part of the brain and controls our higher order functions such as thought perception and personality
What is cerebellums functions
Controls balance and muscular coordination
What is the medullas function
Controls rate of breathing and heart rate
What are gaps between nerves called
Synapses
Where is a male gamete produced
Anthers
Where is a female gamete produced
Ovaries
What is zygote
Fertilized egg
Difference between diploid cells and gametes
Diploid cells have 2 sets of chromosomes !
gametes only have one set of chromosomes and So are called haploid
What’s fertilization
When a male and female gamete join to produce a zygote
What’s genotype
A set of genes that organism posses for a particular charectorisitic
What’s phenotype
The physical appearance of an organism for a particular charectorisitic
What’s a gamete
Sex cell
What’s an allele
Different forms of the same gene
Whys transpiration important to plant cells
So that plants can loose water through the stomata
What two things could increase transpiration
High winds and high temperatures
What vessel does water pass through
The xylem
What strengthens the xylem
Lignin
What’s opens and closes the stomata
Guard cells
How do guard cells open and close the stomata
When guard cells become turgid the stomata open to allow CO2 in and H2O out to allow more photosynthesis
What’s do veins do
Carry blood to the heat, low pressure meaning only need thin walls
What does capillary do
Forms a network between veins and arterys at organ and tissues, low pressure, thin walls
What do arterys do
Carries blood away from heart, high pressure so they need thick walls!
What do veins supply the heart with
Blood
What’s happens if the colanary artery is blocked
If blocked by cholesterol the could cause heart complications eg a heart attack
How do you reduce change of getting heart disease?
Healthy diet and excersise regularly
