Unit%204 - UNIT Cytology 4 his unit introduces students to...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 4 Cytology Cytology 4 U N I T T his unit introduces students to the structureand function of the parts of the cell and the cell cycle. This is a great time to introduce and reinforce the concept of “form follows function,” as well as concepts such as osmosis, tonicity, and the hierarchicallevels of organization of living organisms. As this unit applies the principles of microscopy, it is useful to perform this lab immediately following Unit 3: Introduction to the Microscope. Though much of the discussion in this unit revolves around the structure of a typical cell, Exercise 1 shows students that not all cells have this “typical” structure, and some have vastly different structures and composi- tion. Again, this is a great time to emphasize the nature of the structure-function relationship.Ask your students to consider the function of the cells as they examine them. This unit is the first in which students use a “model inventory.” The model inventorieshelp students focus on the anatomy and to encourage them to look at as many anatomical models as possible. They help all three types of learners—kinesthetic, auditory, and visual—by havingstudentsmanipulatethree-dimensionalstructures as they pronounce and write down the terms. Success on laboratory practicals increased dramatically when I began using model inventories with my students. Hopefully, they will similarlyhelp your students! Tofacilitate your students’ use of the model inventories, your lab may wish to label each model with a descriptivename (e.g., “animal cell”). Materials and Prep Notes Exercise 1: Organelles and Cell Structures Organelles and Cell Structures materials needed: ± Anatomical models of the cell—you may use typical animal cell models, but atypical models (e.g., a neuron or an axon end bulb, muscle cell, and/or sperm cell) may also be used. Building a Plasma Membrane Materials Needed ± Modeling clay in 5 colors (blue, yellow,red, green, and orange) Preparing a Cell Sample Materials Needed ± Glass slide and coverslip, one per group ± Wooden applicator sticks ± Fetal pig (or another preserved small mammal). Note that students may also use their own cheek cells for this procedure if your laboratory rules permit it. ± Methylene blue stain: to prepare, dissolve 1% by weight methylene blue crystals in 95% absolute ethanol (saturated)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
± Distilled/deionized water ± Monocular or binocular microscopes with three objectives Examining Cellular Diversity with Microscopy Materials Needed
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/18/2010 for the course BIO 2402 taught by Professor Opara during the Spring '10 term at Lone Star College.

Page1 / 7

Unit%204 - UNIT Cytology 4 his unit introduces students to...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online