Almost All of Mitosis
interphase
The cell is "getting ready" to divide.
The cell replicates its DNA
The cell also replicates organelles
(Final Stage) Cytokinesis
This stage completes the cycle
The cell begins to distribute the organelles into the 2 new daughter cells.
Plant cells have a cell wall and cell membranes, but animal cells have only cell membranes. What is a possible reason?
Plants need a rigid structure to support them. Animals have bones, muscles, or shells to protect and support them, but plants don't have those.
Organs such as the kidneys, lungs, skin, and liver work together to
help maintain homeostasis
What is the function of the heart?
pump blood throughout the body
to keep you alive
to maintain homeostasis
Prophase
DNA shrinks into separate chromosomes
The nuclear membrane starts to break apart
List the three parts of the cell theory
1. All living things are made up of cells.
2. Cells are the most basic unit of life and function in all living things.
3. All new cells are made from existing cells.
Why is a cell membrane selectively permeable?
A cell membrane is selectively permeable because it can keep unwanted substances out and it can let useful substances in.
The spinal cord is a thick column of
the nervous tissue that connects the brain to the body's nerves
Cell body
Largest part of a neuron, contains the nucleus and cell organelles
Metaphase
The chromosomes line up along the center of the cell.
What is the difference between an autotroph and a heterotroph? Give two examples of each.
An autotroph can make its own food. Two examples are sunflowers and roses. A heterotroph must eat other organisms to get energy. Two examples are deer and foxes. They cannot make their own food.
Because its structure is more complex,
an organ has a more complex function than a tissue
The main purpose of homeostasis is to
keep internal conditions stable
Axon terminals
Neurotransmitters are released from this part of a neuron
Anaphase
Fibers connect to the centrioles and the chromatids are pulled to each side of the cell
Would the ecosystem survive of autotrophs did not exist, why or why not?
The ecosystem would not survive if autotrophs did not exist because heterotrophs rely on autotrophs by eating them or eating heterotrophs that eat autotrophs.
The liver helps the circulatory system by
Filtering blood of harmful subsances.
Nervous tissue is the main component of the _____ system.
nervous
Nodes of Ranvier
gaps in the myelin sheath
Telophase
The nuclear membrane reforms around the DNA to create 2 new nuclei.
Each new nuclei contains DNA
How do raw materials of photosynthesis compare to the products of cellular respiration?
The raw materials of photosynthesis, carbon dioxide and water, are the products of cellular respiration. Light energy used in photosynthesis is similar to chemical energy produced by cellular respiration.
Which of the organs functions as both a respiratory organ and an excretory organ?
lungs
What are neurotransmitters?
chemicals that are released from the axon terminal
Dendrites
Receives signals from other nerve cells, body cells or the environment