Unit 1 Anatomy Lecture

Name the organelle
a. network of membrane-bound channels
b. composition and structure is the same as for the cell membrane
c. synthesis of glycoproteins and lipids, and intracellular transport

Junction that mechanically link the membranes of the cell together. They are very strong and are found in tissues that experience stress from stretching and twisting.

Name the Organelle
a. single membrane-bound sac
b. structure and composition – same as cell membrane
c. contains enzymes that breakdown fatty acids and detoxify toxins

The packing of extracellular materials into a vesicle at the cell surface for importation into the cell. The cell engulfs the material.

The outer componant of the cell membrane is

What structure is responsible for moving materials across the cell surface?

Finger-like extensions of the cell membrane, increases the surface area of the cell (kidneys and intestines)

Junctions that create a tunnel between the cells to allow communication between the cell.

The inner component of the cell membrane (middle) is

Movement of lipid soluble materials across the membrane from high to low concentration.

Name the Organelle
a. double membrane-bound sac
b. composition and structure are the same as the cell membrane
c. site of adenosine triphosphate (ATP) synthesis

Name the organelle:

a. double membrane-bound sac
b. structure and composition – same as cell membrane
c. controls the structure and function of the entire cell, synthesis of ribosomes

What types of substances are transported via receptor mediated endocytosis?

Movement of water from an area of high SOLUTE concentration to low SOLUTE concentration.

A vessicle fuses with the interior plasmalemma and opens to the outside of the cell releasing it's contents.

Phospholipid bilayer that encloses the cell.

Requires protein channel for lipid insoluble (polar) molecules to move across the membrane from high to low concentration

Carrier molecules work despite opposing concentration gradients. (low to high)

Name the following organelle:

a. stacks of membrane-bound channels
b. structure and composition – same as cell membrane
c. functions:
1) modifies and packages proteins (produced by the ER) for release by
exocytosis
2) produces vesicles that become part of the cell membrane
3) produce lysosomes

Name the organelle:

a. small acorn-shaped structures consisting of a small and large subunit
b. composed of protein and ribosomal (r)-RNA
c. site of protein synthesis

Contains cytosol and organelles.

What is made up of the following?

Microfilaments
a. thin strands
b. composed of protein
c. intracelluar support and movement

Microtubules
a. long hollow tubes
b. composed of protein
c. intracellular support, intracellular & cell movements, structural component

Which structure is essential for moving chromosomes during cell division?

Junction that comes into close contact with each other, sealing off any intracellular space between the cells. Lines the cavities of the body and skin.

The process that resembles pinocytosis, but is more selective and only allows the entrance of specific molecules into the cell.

Name the organelle
a. single membrane-bound sac
b. structure and composition – same as cell membrane
c. contains enzymes for intracellular digestion