Chapter 3 Word Scramble
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Term | Meaning |
Cells | the living structural and functional units enclosed by a membrane |
cells arise from ______________. | Existing cells by cell division |
what does selective permeability mean? | allows only certain substances to enter or exit the cell |
what is the cytoplasm? | the fluid portion of the cell |
where is the cytoplasm? | between the plasma membrane and the nucleus |
what is the fluid of the cytoplasm called? | cytosol |
what structures are contained in the cytoplasm? | organelles |
what are characteristics of organelles? | have characteristic shapes and specific functions |
what are some examples of organelles? | cytoskeleton, ribosomes, endoplasmic reticulum, gogli complex, lysosomes, peroxisomes, mitochondrion |
what is the nucleus? | the largest organelle in the cell |
what does the nucleus contain? | most of the cells DNA, 46 chromosomes, genes |
what is a chromosome? | a single DNA wound around proteins |
what are genes? | the hereditary units that control most aspects of cellular structure and funtion found in the DNA |
what is the lipid bilayer? | basic framework of the plasma membrane made up of back to back layers of 3 parts of lipid molecules |
what are the three types of lipid molecules? | phospholipids, cholesterol, glycolipid |
what contains 75% of membrane lipid? | phospholipid |
what is the phospholipid made of? | head made of phosphate, and tail made of lipid |
is the phospholipid head hydrophilic or hydrophobic? and why | hydrophilic, the head is made of phosphate and loves water |
is the tail hydrophilic or hydrophobic? and why | hydrophobic, the tail is made of lipid (fat) and hates water |
Name the parts of a cell | plasma mebrane, cytoplasm, nucleus |
what is the plasma membrane | flexible outer surface seperating cell's internal environment from the external environment |
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