Chromosomes/Interphase
What is a chromosome?
one long continuous thread of DNA that consists of many genes
According to the cellular hierarchy, an ________ is the least complex and smallest level.
What is a cell
What is the acronym that we use to remember the stages of mitosis
PMAT
What is homeostasis?
A stable, internal environment.
What is a Stomata and what is its function
A stomata is a pore on the underside of a leaf with guard cells that open and close it to control water loss
What are the 3 stages of interphase
G1, S, and G2
This term refers to the most complex level of the cellular hierarchy.
What is an organism?
What is mitosis?
Cellular division part of the cell cycle.
How does the cell membrane help to maintain homeostasis?
It is selectively permeable meaning it is picky about what goes in and out of the cell.
What happens during interphase?
- replication of DNA
- cell growth
This is a group of cells that are are similar in structure and function and work together to perform a specific activity.
What is tissue?
Daughter cells have the same ______.
DNA
What is positive feedback and an example?
Positive feedback amplifies the effect. Ex: Childbirth, blood clotting, fruit ripening
True or false: The cell cycle spends most of its time in interphase.
True
Name the levels of organization from the smallest to the biggest
Cells, Tissues, Organs, Organ Systems, Organism
What are the stages within mitosis?
Prophase
Metaphase
Anaphase
Telophase
What is negative feedback?
A way for the body to return quickly back to homeostasis.
Some people say that interphase is the resting phase of the cell. Is this accurate? Why or why not?
Resting in terms of not dividing, yes.
Resting in terms of doing nothing, no. The cell grows, duplication of organelles, and replicates DNA in this phase.
Why does a liver cell and a Heart cell behave different even though they have the same DNA
Because the use different parts of the genetic code for functioning.
What happens at each stage of mitosis?
Prophase: chromosomes condense and envelope breaks
Metaphase: chromosomes line up in center
Anaphase: chromotids pulled apart
Telophase: envelope reforms
Cytokinesis: cell splits into 2 daughter cells
Is negative feedback a bad thing?
NO! Negative feedback returns the body straight back to homeostasis so the internal balance can be maintained.