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level: Cells and tissue

Questions and Answers List

level questions: Cells and tissue

Question	Answer
Is in the middle of the cell and stores and processes DNA; controls metabolism	Nucleus
'Power generators'- They generate energy in the form of ATP. Cells that perform highly have lots of these organelles.	Mitochondria
There is smooth and rough , makes products like lipids carbs, fats and proteins	Endoplasmic reticulum (ER)
Stores, modify and package products synthesised by ER	Golgi apparatus
It's purpose is to isolate the cell from surrounding environment (ECF) forming a physical barrier.	Plasma membrane/ cell membrane
Allows substances such as lipids, oxygen and CO2 to pass through the plasma membrane easily.	Diffusion
Permit movement of substances into & out of the cell that cannot pass through cell membrane.	Channels
Stop substances from going in or out of the plasma membrane that are either too large to fit through the channels or are unable to diffuse. These molecules are transported by a carrier mechanism.	Carrier proteins
Transport material in and out of the cell. Small membranous sacs that form or fuse with the plasma membrane. The two major forms of vesicular transport are endocytosis and exocytosis, both require ATP	Vesicles ( membrane sacs)
Loves exposed surfaces, Lines internal passageways & chambers, forms secretory glands.	Epithelial Tissue
Squamous, cuboidal and columnar. Simple epithelium is one layer and stratified layers is more than one	What are the 3 basic epithelial tissue shapes?
Fills internal spaces, provides structural support and stores energy	Connective tissue
Conducts electrical impulses, carries information. Nervous tissue contains 2 cells, neurogila or glial cells	Nervous tissue
Contracts to produce movement, includes skeletal muscle, cardiac muscle and smooth muscle.	Muscle tissue
50% muscle tissue, 45% connective tissue, 3% Epithelial tissue, 2% nervous tissue	what is the percentage of each muscle tissue in the human body?