Key knowlage Flashcards
name the organelle that controls substances entering and leaving the cells
Cell membrane
name a condition that may be treated with stem cells
diabetes or paralysis
name an adaptation of a root hair cell
large surface area
name the organelle that is the site of respiration
Mitochondria
name the organelle that contains cell sap
vacuole
state 3 conditions that can affect the rate of diffusion
concentration, temperature, surface area
what is active transport
movement of particles from an area of low concentration to high concentration which requires energy from respiration
where in the cell do the most chemical reactions take place
cytoplasm
what type of cells are bacteria cells
prokaryotic
name the organelle that is the site of photosynthesis
chloroplasts
what is present in eukaryotic cells but not prokaryotic cells
a nucleus
name the organelle that contains cellulose
cell wall
name the circular piece of DNA found in bacteria cells
plasmid
what is diffusion
movement of partials from an area of high concentration to low concentration
what is osmosis
diffusion of water molecules from a dilute solution to a concentrated solution through a partially permeable membrane
name the organelle that controls cell activities
Nucleus
name 1 adaptation that alveoli have to increase the rate of diffusion
thin cell membrane
name the organelle that contains chlorophyll
chloroplasts
name the adaptation of muscle cells
the ability to contract and relax
describe an adaptation of a sperm cell
a long tail for movement
what type of cells are plant and animal cells
eukaryotic
write down the equation to calculate magnification
image size / actual size
name the organelle that produces proteins
ribosomes
what does active transport allow plants to absorb through their roots
minerals
name one advantage that an electron microscope has over a light microscope
higher magnification and resolving power
name the cell division that is important in growth and development
mitosis
what type of cells can differentiate into any type of cell
stem cells
where can stem cells be found in the human body
embryos or adult bone marrow
where can stem cells be found in a plant
meristem tissue
what happens to the genetic material in the first stage of mitosis
doubles
