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Living Env.

Unit 2 Cell Test review - Concept 3

QuestionAnswer
list the levels of organization from least to greatest cell, tissue, organ, organ system, organism
internal regulation a cell receives a signal from inside the cell to make more
What is a malignant tumor tumors that cause other tumors to grow in other parts of the body
After mitosis do the daughter cells have the same number of chromosomes or 1/2 of the chromosomes? same number
What happens during interphase? cell growth, duplicated organelles and divides the cytoplasm
Which organelle helps with cell division? centrioles
Why do cells need to divide during mitosis? it produces cells that are identical to the original cell
What happens during prophase? the nuclear membrane breaks down, centrioles appear, chromosomes line up in the middle of the cell
What are stem cells? undifferentiated cells that can turn into different kinds of cells as needed
What happens during interphase? cell growth
why do body cells divide? growth and repair
What is external regulation of cells? signals come from outside of the cell such as hormones
What is a carcinogen? chemicals that cause cancer
Definition of cancer cells cells that continue to divide uncontrollably
What is apoptosis? programmed cell death
What happens during the S phase of mitosis? the chromosomes duplicate
During an experiment, which variable is tested? independent variable
During an experiment, which variable is measured dependent variable
What is a hydrophilic substance? likes water
What is a hydrophobic substance? hates water
List 4 macro molecules proteins, carbohydrates, lipids, nucleic acid
What is the function of proteins? provide structure
What is the function of carbohydrates? provide energy
What is the function of lipids? make up cell membranes
What is the function of nucleic acid? store and pass on genetic information
Created by: cboula
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