Chapter 2 Flashcards
Cells and Systems
What do microscopes allow us to see?
CELLS!
Compound means
two or more lenses which allow us to see very small things
Formula for Magnification
Magnification(m) = Objective(o) * Eyepiece(e)
Field of view is measured as…
the diameter of the circle you see
Cells are the basic unit of every system: True or False
TRUE!
Describe tissue
the collection of cells that perform the same job
Organs are
structures that perform particular functions
Tell me about systems
its a composition of multiple organs to fulfill distinct characteristics
What do organelles do?
They serve function to the cell.
What are organelles?
They are membrane bound structure inside the cell.
Function of cell membrane is to
surround and protect the contents of the cell
Cytoplasm can be described as
a water-like fluid that fills the cell while distributing material throughout
What does the nucleus do?
It controls the cell’s activities
Vacuoles are storage space for…
waste and other substances
The power plan of the cell is known as
Mitochondria
Which part of the cell breaks down and digests materials?
The lysosome
Golgi Apparatus does what?
It tells molecules where they need to be shipped.
Endoplasmic Reticulum
has a function of gathering simple materials and packaging them in a more complexed way
Tell me what the cell wall is responsible for.
Providing support for the cell.
Which is thicker, cell membrane or cell wall?
The cell wall.
Photosynthesis occurs in which organelle
Chloroplasts
Which chemical is found in chloroplasts?
Chlorophyll!
Name 3 unicellar organisms.
Ameoba, Bacteria, Paramecium
Multicellar organisms have more than two cells
True or False
TRUE
A selectively permeable membrane…
only allows SOME materials to pass through it
Tell me what diffusion is
It’s the movement of particles from high concentration to low concentration.
Describe Osmosis
Diffusion through water, except it requires a semipermeable mebrane.
What does it mean to reach equillibrium?
When all the particles within a liquid are evenly dispersed.
Do red blood cells have a nucleus?
No they do not.
STEM cells are what?
The first cell of a multicellular organism.
What are the 4 different types of tissues?
Connective, Epithal, Nervous, Muscle
Describe what happens to cells in hypotonic solutions
cell is put into pure water, and water rushes into the cell - cell EXPLODES
Isotonic solutions occur when
water going into the cell moves at the same rate as water moving out of the cell
Hypertonic solutions are when
the cell is placedin a sugary or salty solution, and due to osmosis water, moves out of the cell - cell SHRIVELS up
Homeostasis is when
an organism remains stable internally regardless of its environment
What is the specialization of Muscle Cells?
Movement and Strength
Nerve cells specialize in
sending messages
