Answer the following questions from the videos posted on e-college for week 1
1. The tail of the phospholipid molecule of the cell membrane has a hydrophilic head and a hydrophobic tail. Explain why?
The Hydrophilic head attracts water. It also has a negatively charged phosphate group, and may contain other polar groups. The hydrophobic tail usually consists of long fatty acid hydrocarbon chains. When placed in water, phospholipids form a variety of structures depending on the specific properties of the phospholipid. These specific properties allow phospholipids to play an important role in the phospholipid bilayer.
2. Differentiate between the functions of the smooth and rough endoplasmic reticulum.
Rough Endoplasmic Reticulum is a folded membrane that comes out of the nucleus. The outer surface of it is surrounded with ribosomes. Ribosomes on the rough endoplasmic reticulum are called ‘membrane bound’ and are responsible for the assembly of many proteins.
Smooth Endoplasmic Reticulum doesn’t contain Ribosomes. It produces lipids and cholesterol in a cell. It also plays a roll in detoxification and breaking down toxins.
3. Differentiate between eukaryotic and prokaryotic cells.
Prokaryotic Cells don’t have nucleus an example of which is a bacteria.
Eukaryotic Cells are cells that does have a nucleus examples of which are plants, animals, produce.
4-What is the main function of the fluid connective tissue (blood)?
Blood is made up of plasma and few different types of other cells. It’s main function is to move nutrients, oxygen, and antibodies throughout the body.
5-What are the different types of microscopic examination of cells and tissues?
Fixation terminates any ongoing biochemical reactions, and may also increase the mechanical strength or stability of the treated tissues. The broad objective of tissue fixation is to preserve cells and tissue components and to do this in such a way as to...