LAB 4: Revisiting The Structure And Function Of Plant & Animal Cells

Question 1

The ____ microscope uses lenses and light to enlarge the image and is also called an optical or light microscope.

Answer 1

compound

Question 2

the lens at the top that you look through, usually 10x or 15x power.

Answer 2

Eyepiece lens/ ocular lens

Question 3

Connects the eyepiece to the objective lenses.

Answer 3

Tube

Question 4

Supports the tube and connects it to the base.

Answer 4

Arm

Question 5

The bottom of the microscope, used for support.

Answer 5

Base

Question 6

A steady light source (110 volts) used in place of a mirror. If your microscope has a mirror, it is used to reflect light from an external light source up through the bottom of the stage.

Answer 6

Illuminator

Question 7

The flat platform where you place your slides.

Answer 7

Stage

Question 8

hold the slides in place

Answer 8

Stage clips

Question 9

To move the slides left right up down

Answer 9

A mechanical stage

Question 10

This is the part of the microscope that holds two or more objective lenses and can be rotated to easily change power.

Answer 10

Revolving Nosepiece or turret

Question 11

Usually you will find 3 or 4 objective lenses on a microscope. They almost always consist of 4x, 10x, 40x and 100x powers.

Answer 11

Objective lenses

Question 12

is to focus the light onto the specimen

Answer 12

Condenser

Question 13

Light intensity may be adjusted by adjusting the

Answer 13

Diaphragm or Iris

Question 14

Is a rotating disk with holes of a different diameters

Answer 14

Disk diameter

Question 15

Changes the distance very little

Answer 15

Fine-focus knob

Question 16

Changes the distance very greatly

Answer 16

Coarse-focus knob

Question 17

One should always begin to use the microscope with the ____ objective because it allows for more of the specimen to be seen in a ___ view, as well as it will be easy to locate the part of the sample

Answer 17

low-power, wider

Question 18

TRUE or FALSE

You should only use the fine adjustment when the high-power is in position

Answer 18

True

Question 19

is a basic step in the investigation of several disturbances affecting the male genital tract.

Answer 19

Semen analysis

Question 20

Analysis of seminal parameters provides important clinical information on the ____ and functional competence of ____, as well as on the secretory pattern of the accessory genital glands.

Answer 20

spermatogenesis, spermatozoa

Question 21

is particularly useful in the evaluation of couples requiring fertility investigation (to detect genital infections and pathologies) and in verifying the influence of environmental factors, drugs, lifestyle, chemical products, and professional activities on several diseases affecting male reproductive health. (Andrade-Rocha, 2003)

Answer 21

Semen analysis

Question 22

Why do plants have the ability to stand on their own

Answer 22

Plants can stand on their own due to the structural support provided by their rigid cell walls made of cellulose and specialized tissues like xylem, which strengthen the plant. Additionally, turgor pressure, created by water inside the plant cells pressing against the cell walls, helps maintain stiffness and upright posture. The root system also plays a crucial role by anchoring the plant in the soil and providing stability, allowing it to absorb water and nutrients that contribute to its overall strength. Together, these factors enable plants to maintain their shape and stand independently.

Question 23

Makes the specimen bigger or in view. Make small objects visible with the naked eye

Answer 23

Magnification

Question 24

Allows the specimen to be viewed clearly. Create sharp, distinct images that can help determine what type of specimen you’re looking at

Answer 24

Resolving power