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Tissues & Homeostasis
n/a
25
Physiology
Undergraduate 3
10/05/2011

Additional Physiology Flashcards

 


 

Cards

Term
Tissues
Definition

 

Similar cells grouped together to perform a common function

 

Term
4 Primary Tissue Types
Definition

Muscle

Epithelia

Nervous

Connective

Term
Muscle
Definition

 

Specialized for contraction---> enables movement of skeleton or internal organs

 

Term
3 types of Muscle
Definition

skeletal

cardiac

smooth

Term
Skeletal Muscle
Definition

 

-generally attaches to bones

 

 -causes movement of skeleton

 

-striated (striped)

 

-multinucleated (formed from union of separate cells during development)

-voluntary (conscious control)

 

 

 

Term
Cardiac Muscle
Definition

-heart muscle

-striated

-1 nucleus/cell

-contract as one unit

-involuntary

 

Term
Smooth muscle
Definition

-movement within internal organs such as digestive tract, bladder, arteries, etc

-no striation

-1 nucleus/cell

-involuntary

Term
Nervous Tissue
Definition

 

 

-Composed of cells that generate & conduct electrical impulses and supporting cells-->fast coordination

 

 

 

 

 

 

 

Term
Neurons
Definition

 

(nerve cells): conduct electrical impulses and transmit chemical signals between themselves andeffectors (are muscles or glands)

 

Term

Central Nervous System

(CNS)

Definition

 

oligodendrocytes (insulation),

microglia (defense),

astrocytes (support/nutrition)

 

Term

Peripheral Nervous System

(PNS)

Definition

 

Schwann cells and satellite cells

 

Term
Epithelial Tissue
Definition

 

Sheets of tightly packed cells (membranes) & glands

 

Term
Membranes
Definition

covering and lining outside of the body (generally except in digestive tract) 


protective covering, absorption, secretion, etc.

Term
Epithelial Cell Shapes
Definition

Squamos

(flat, e.g.epidermis)


cuboidal

(square, e.g. salivary ducts)


columnar

(tall and thin, e.g. lining of digestive & resp. tracts)

 

Term
Exocrine glands
Definition

 

  -have ducts

 

  -secrete chemicals outside of body or into digestive tract

-e.g. sweat glands, majority of pancreas, etc

Term
Endocrine Gland
Definition

 

no ducts

 

-secrete chemicals (HORMONES) into blood

 

  e.g. dopamine, adrenaline, epinephrine

 

-e.g. adrenal gland, certain cells of pancreas

 

Term
Connective Tissue
Definition

 

Sparse scattering of cells in an extracellular matrix;

 

Functions:

a.) structural support and binding of other tissues

 

  b.) defense against foreign particles or organisms

 

  c.) diffusion of nutrients from blood vessels to other cells

 


 

Term
Types of Connective Tissue
Definition

 

* connective tissue proper          

 

* bone

 

 

 

* cartilage    

 

* blood

 

Term
Connective Tissue Proper
Definition

 

Tendons- muscle--> bone

 

Ligaments- bone-->bone

 

Adipose- fate tissues

 

Dermis- pink, shiny stuff below

 

             epidermis

 

Term
Cartilage
Definition
joint surfaces; supports and protects
Term
Blood
Definition

 

transport materials (nutrients, oxygen, wastes) around body & immunity

 

Term
bone
Definition

 

structure, protection, aid in movement

 

Term
homeaostasis
Definition

 

 

dynamic internal constancy

 

Organ systems help maintain homeostasis


 

 

 

Term
negative feedback
Definition

 

Results in a return to

 

 homeostatic equilibrium because the response reduces stimulus (stress)

 

• Examples:

 

– Regulation of blood

 

    glucose

 

– Regulation of body

 

   temperature

 

– Pretty much the

 

majority of physiologic

 

mechanisms

 

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