BIOL 319 LAB 1 quiz

What type of objective lenses are there?

4X, 10X, 40X. You start with 4X and increase from there. As you increase, Working distance decreases & field of view gets smaller.

How to view specimen on slide?

Put coverslip over specimen/drop of water on the microscope slide → lower coverslip, slowly avoiding bubbles

Histology

Study of the microscopic structure of cells, tissues, and organism relation to their function

Four major tissue categories

Epithelial, Muscular, Nervous, Connective

Epithelial

Muscular

Neuron

Connective

Epithelial Characteristics

Regeneration, Polarity (Apical & Basal surface), Cellularity & specialized contents, Lines parts of body & forms boundaries (skin & internal passageway), Supported by connective tissue (reticular lamina), Avascular, Innervated, forms glands.

Epithelial Functions

Filtration, Absorption & secretion, Protection, Excretion, Sensory Reception.

Epithelial cell shapes & arrangement of layers

Squamous, cuboidal, columnar & Simple, stratified

Muscular tissue, 3 types

Skeletal, Cardiac, Smooth

Skeletal

Fibers. Has striations/stripes, voluntary. At muscle on bone.

Cardiac

Myocytes. Has smooth/less obvious striations, involuntary. Joined together by intercalated disks. At heart.

Intercalated disks

facilitate the transmission of electrical impulses in the heart.

Smooth

nonstriated, involuntary. At digestive tract / large, small intestine & stomach wall.

Nervous tissue

Neurons and glial cells. Conduct electrical signals called A.P. At the brain, spinal cord, ganglia, peripheral nerves

Connective

Structural support and joining structural components to one another. Mesenchyme. Has an extracellular matrix.

Mesenchyme

Common embryonic tissue that connective cells begin with.

Connective 3 groups

Connective tissue proper, Fluid connective tissue, Supporting connective tissue.

Connective tissue proper

Loose & Dense

Fluid connective tissue

Blood & Lymph

Supporting connective tissue

Bone & Cartillage

Areolar, proper loose

Reticular, proper loose

Adipose, proper loose

Dense regular, proper

Dense irregular, proper

Fibrocartillage, supporting cartilage

Elastic, supporting cartilage

Hyaline, supporting cartilage