Unit II lab exercises 8-10

!!!CAUTION!!!

• This power point presentation is intended
to be used as an “add on” exercise to your
standard lab experience. It is not intended
to be used in lieu of the “hands on” lab
time. In lab you will be tested on the
actual lab specimens and not the pictures
contained within this video presentation.

How to use this material

• Each specimen is illustrated in a two slide sequence.
The first slide contains a fully labeled specimen. The
second slide is missing the labels and asks you to supply
them like a test circumstance. You can toggle back and
forth between the two slides until you have mastered all
the items.

• This presentation is patterned after material within your
lab manual by Darrell Davies. Be sure to check with
your instructor for any alterations specific to your course.

• This presentation is designed to better prepare you for
lab quizzes, or Part I of the two part testing system in
each lab unit. Other video material (A.D.A.M. and
Histology) is accessed elsewhere. Those materials are
for lab practicals, Part II of testing in each lab unit.

ACKNOWLEDGEMENTS

• Funding for this presentation was obtained
through an Innovations In Learning
Technologies grant at KVCC.

• I wish to thank Marylan Hightree and Lynn
Morrison for their technical assistance during
development of this material.

• I also wish to thank Michelle VanderMeer for her
work in developing the beta version of this
presentation as her tutoring internship while
working at the KVCC Learning Center.

Unit II
lab exercises 8-10

Sarcomere
Myoneural Junction
Endocrine Glands

Sarcomere Model

Lab exercise #8

I band A band

Actin & Myosin
overlap area

Mitochondria

Sarcoplasmic Reticulum
(all yellow areas)

?? ??

? & ? overlap area

?
??

(all yellow areas)

Length of 1 sarcomere

Z-Line Glycogen granules Z-line
(orange dots)

Lateral sacs
(cisternae)

Transverse tubules

? of ? ? ?-?

??
?-? (orange dots)

? ? (?)
??

Myoneural Junction Model

Lab exercise #8

Skeletal muscle fiber sarcolemma
made up of many myofibrils
surrounded by endomysium

Myoneural
junction
area

Motor neuron

? ? ? made up of many ? ?
surrounded by ?
? ? area

??

Synaptic cleft (small space A band
between muscle (darker)
and neuron)
I band
Myelin of neuron (lighter)
(yellow swirls xs.)

? ? (small space
between muscle
and neuron)

??
(?)

??
(?)

? of neuron
(yellow swirls xs.)

Multipolar Neuron

Lab exercises #9

Transverse Section
of the axon

PNeeruinroeluermalmSahe/ ath

Myelin Sheath / Axon core
Sheath of Schwann containing

?/?? ? section
of the ?

? ? / ? of ? ??
containing

?

The Axon

Myelin Sheath / Neurolemma /
Sheath of Schwann Perineural Sheath

core

Nodes of Ranvier

The ?

??/ ?/
? of ? ??

?

? of ?

Incoming axon Soma of multipolar neuron
terminals Nucleus

Dendrites Initial segment
(Hillock) of axon

??? ? of ? ?
? ?

??
( ? ) of ?

Brain Ventricles

Lab exercises #9

Cerebral aqueduct

Rt. Lat. Vent. Hole for thalamus
Intermediate mass

4th. Vent.

3rd. Vent.
Rt. Lateral view of brain ventricles

??? ??
?? ? For ? ? ?

??
? ? view of ? ?

l.l.v.3rd. Vent.
Lt. lat. Vent.Anterior view of brain ventricles

Rt. Lat. Vent.
r.l.v.

?? ???
? view of ? ????

???
???

3rd. Vent.

Cerebral Left lateral vent. Right lateral vent.
aqueduct

4th. Vent. Choroid plexus
(pink areas)

Posterior view of brain ventricles

??? ?????

??

??
? ? (pink areas)

? view of ? ?

Brain Stem

Lab exercises #9

Thalamus lateral
masses

Optic nerves

Pituitary gld. Internal carotid a.
Pons
Medulla oblongata

Spinal cord
Anterior view of brain stem

???
??

?? ???
?

??

??

? view of ? ?

Thalamus Lateral
masses

Choroid plexus
(rt. Lat. Vent.)

Pineal gld. Choroid plexus
(3rd. Vent.)

Posterior view of brain stem

???

??
(? ? ?)

? ?(? ?)
??

? view of ? ?

Fornix Thalamus lateral masses

3rd. Vent. & Choroid
Hypothalamic plexuses

areas

Cerebral Optic chiasm Thalamus
aqueduct intermediate
Pons
Pituitary gld. Medulla mass
oblongata
Pineal gld.

Midsagittal section view of brain stem

? ???

? ? &? ? ??

?? ?? ???
?? ? ??
??
? section view of ? ?

? view ? view

Cranial nerves
(white structures)

Inferior-anterior view of brain stem

??
(white structures)

?-? view of ? ?

Spinal Cord

Lab exercises #9

Gray matter Dorsal roots Dorsal root
(butterfly) ganglia
Central
canal

Ventral median Spinal nerve
fissure

Ventral roots

?? ???
??
? ?(?)

??? ??
??

Eye

Lab exercises #9

Superior rectus mus.

Lacrimal gld. Frontal bone

L Cornea Lacrimal duct M
A (clear) E
T Pupil D
E Sclera (black hole) I
R (white) A
A L
L
Iris
Lateral rectus mus. (blue)

Zygomatic bone Maxilla bone

Inferior oblique mus.

??? ??
??

? ? ?? ?
? (clear) ?
? ? ?
? ? (black ?) ?
? (white) ?
? ?
? ??
??? ?
??? (blue)

??

mus. Superior oblique mus.

M rectus Lacrimal gld.
E
D Superior L
I rectus mus. A
A T
L Lateral E
R
Medial rectus A
mus. L

Optic nerve Inferior rectus
mus.

???

? ??? ??
? ?
? ?
? ? ?
? ? ?
? ?
?
??? ?
?
??
???

Medial Retina Cornea Superior view
rectus (innermost) Ciliary body / muscle of dissected

mus. eye ball

Lens A
N
Choroid T
(brown) E
R
I
O
R

Inferior Sclera
rectus (white)
mus.

? view
of dissected

eye ball

??? ??/? ?
?
? ?
(innermost) ?
?
?? ?
?
? ?
(brown)

?
(white)

???

Ear

Lab exercises #9