Download Post lab worksheet lab 2 Complete, or respond to, the following

Post lab worksheet lab 2
1. Complete, or respond to, the following questions:
a.
The _____ is a lens under the stage that
concentrates the light.:
condensor
b.
The area of a slide seen when looking through field of view
a microscope is the:
c.
If the stage has a device that moves the slide
from side to side and up or down, the stage
is called a(n) _______________ stage.
d.
The ability to distinguish between closely
positioned objects is called:
mechanical
resolution
e.
If, after focusing using a low power objective parfocal
lens only the fine adjustment needs to be used
to focus under a higher power, the microscope
is said to be:
f.
If a microscope has a 10X ocular lens and
the objective lens in use is the 100X,
what is the total magnification achieved?
1000X
g.
The distance from the bottom of the objective
Lens to the specimen is called the:
working distance
h.
The set of lenses closest to the viewer’s eyes ocular lens
are:
i.
What device allows the user to alter the
amount of light that passes through a
specimen from a light source?
j.
You are looking into the microscope and are surprised to see that only
half of the field is illuminated. What is the probable cause?
Objective lens not fully in place
You are viewing a specimen using a microscope and you
attempt to change the position of the specimen in the field using the
mechanical stage. You are surprised when the slide does not move.
What is the probable cause?
slide not properly placed in the slide holder
k.
iris diaphragm
l.
The letter “J” appears in this orientation under the cover slip of a
microscope slide. How will this letter appear when viewed using a
microscope? (Draw it in the space):
__________________________
2. Indicate which type of preparation (whole mount, smear, longitudinal section,
cross section or squash) you would use in the following situations:
To do a blood cell count
smear
To view the lumen (opening) in the trachea
cross section
To view an entire, intact human embryo
whole mount
To view the internal tissues of a tooth
longitudinal section
from the superior portion to the inferior portion
To release pathogens from infected
cells in preparation for microscopy
squash
3. Using your textbook, determine the function(s) of the following:
Plasma
Membrane:____________________________________________________
______________________________________________________________
Cytoplasm:_____________________________________________________
Nucleus: _____________________________________________________
______________________________________________________________
4. Indicate whether the tissue/cell below is derived from ectoderm (EC), mesoderm
(ME), or endoderm (EN):
EN
liver
EC
skin (epidermis)
ME
lymphatic tissue
ME
heart
EC
brain and spinal cord
EC
adrenal medulla
ME
bones
ME
blood
ED
lining of the respiratory tract
ED
thyroid gland