Anatomy & Physiology Flashcards
Anatomy
The science of the structure of the body and the relation of its parts
Physiology
The science of how the body functions
Prokaryote
Cell lacks true membrane bound nucleus and organelles
What type of cell are all bacteria?
Prokaryote
Eukaryote
Has membrane bound nucleus and organelles
Three major components to eukaryotes
Cell membrane
Nucleus
Cytoplasm
What are cell membranes composed of
Double layer phospholipids
Proteins
Carbohydrate chains
Cholesterol
Components of ribosomes
Proteins
RNA
Ribosome function
Protein synthesis
What types of cells have large numbers of mitochondria
Cells that require high levels of energy
Rough endoplasmic reticulum function
Protein transport
Smooth endoplasmic reticulum function
Cholesterol synthesis Steroid hormone synthesis Lipid synthesis Drug detoxification Glycogen breakdown Fat transport
Where are large amounts of smooth endoplasmic reticulum
Liver cells
Intestinal cells
Testes
Golgi Complex Function
Receiving, packaging, distribution
Modify & synthesize carbohydrate portion of glycoproteins
Export substances from endoplasmic reticulum to cytoplasm
Lysosome production
Lysosome functions
Digestive enzymes for intracellular bacteria
Breakdown nonfunctional organelles
Where are large numbers of lysosomes found
Phagocytic cells
What are peroxisomes
Membrane bound organelles that contain strong oxidase and catalase enzymes
Peroxisome functions
Detoxify alcohol & formaldehyde
Convert free radicals into peroxide
Where are large numbers of peroxisomes found
Liver cells
Kidney cells
Function of cytoskeleton
Form / structure
Support
Enables movement
Centrioles
Base of cilia and flagella
Solute
Substance that can be dissolved
Solvent
Substance that does the dissolving
Solution
Uniform mixture of solute and solvent
Intercellular
Between cells / interstitial
Types of passive transport
Diffusion
Facilitated diffusion
Osmosis
Filtration
Diffusion
Movement of molecules from areas of high concentration to areas of low concentration
Example of diffusion
Oxygen / CO2 exchange
Facilitated Diffusion
Diffusion with the aid of a carrier protein
Example of facilitated diffusion
Glucose entering cells
Osmosis
Movement of water from area of low solute concentration to area of high solute concentration
Osmotic Pressure
Amount of pressure needed to stop flow of water across a membrane
Filtration
Small solutes being forced through a membrane by hydrostatic pressure
What kind of passive transport is used in the kidneys
Filtration
Types of active transport
Endocytosis
Exocytosis
Active transport
Endocytosis
Materials being taken into a cell
Types of Endocytosis
Phagocytosis
Pinocytosis
Receptor-mediated
Phagocytosis
Cell eating
Cell membrane extends around solid particles
What types of cells perform phagocytosis
Some WBC
Macrophages
Pinocytosis
Cell drinking
Cell membrane extends around fluid droplets
What cells perform pinocytosis
Absorptive cells in the small intestine
Receptor-Mediated Endocytosis
Specialized membrane receptors bind to substances entering the cell
What types of substances enter the cell through receptor-mediated endocytosis
Enzymes Insulin Hormones Iron Cholesterol
Exocytosis
Materials expelled by the cell
What types of substances utilize exocytosis
Hormones
Neurotransmitters
Waste materials / mucus
Active Transport
Movement of molecules from areas of low concentration to areas of high concentration with the aid of carrier proteins
What types of substances use active transport
Sodium potassium pump
Ions
Amino acids
Hypotonic
Extracellular fluid less concentrated than intracellular fluid
What happens to RBC in hypotonic solutions?
Gain water & burst
Hemolysis
Hypertonic
Extracellular fluid is more concentrated than intracellular fluid
What happens to RBC in hypertonic fluid?
Lose water and shrivel / crenate
Isotonic
Concentrations of extracellular and intracellular fluids are equal
Tissue
Groups of similar cells with related functions
Histology / Microanatomy
Study of tissues
Four primary types of tissue
Epithelial
Connective
Muscle
Nervous
Subtypes of epithelial tissue (6)
Squamous Cell Cuboidal Columnar Pseudostratified columnar Transitional Glandular
Squamous Epithelium characteristics
Flat, thin, plate-like cells
Where are simple squamous epithelial cells found
Lines blood vessels
Alveoli of lungs
Thoracic cavity
Abdominal cavity
Where are stratified squamous epithelial cells found
Areas of wear Mouth Esophagus Vagina Rectum Epidermis (keritinized)
Cuboidal Epithelium characteristics
Cube-shaped cells
Where are simple cuboidal epithelial cells found
Glands
Ducts
Surface of ovary
Kidney tubules
Where are stratified cuboidal epithelial cells found
Fairly rare
Lines sweat ducts
Salivary glands
Mammary glands
Columnar Epithelium characteristics
Tall, rectangular cells
Where are simple columnar epithelial cells found
Lines digestive tract
Bronchi
Uterine tubes
Uterus
Where are stratified columnar epithelial cells found
Relatively rare
Mammary ducts
Portions of male urethra
Pseudostratified Columnar Epithelium characteristics
Appear to be more than one layer but all cells contact basal membrane
Usually ciliated
Associated with goblet cells
Where are pseudostratified columnar epithelial cells found
Respiratory tract
Transitional epithelium characteristics
Resemble cuboidal & squamous shaves
Where are transitional epithelial cells found
Areas needing great distension
Urinary bladder
Ureters
Part of urethra
Glandular epithelium characteristics
Specialized to secrete
Where are glandular epithelial cells found
Ducts
Endocrine Glands
Ductless
Secrete hormones directly into the bloodstream
Exocrine Glands
Have ducts and secrete onto an epithelial surface
Elements of connective tissue (3)
Cells
Fibers
Matrix
Functions of connective tissue
Connects stuff Structural support Protection Insulation Transports fluids Stores energy
Types of fibers / connective tissue fibers (3)
Collagen fibers
Elastic fibers
Reticular fibers
Collagen fibers
Long, straight, very strong
White
Composed of collagen
Elastic Fibers
Long, thin, branching, stretchable
Yellow fibers composed of elastin
Reticular Fibers
Collagen fibers in a complex network
Loose Connective Tissue Types
Areolar
Adipose
Reticular
Areolar tissue
Most widely distributed
Supports organs
Protection & flexibility
What types of cells are made of areolar tissue
Fibroblasts
Macrophages
Mast cells
WBC
Adipose Tissue
Insulation
Cushioning
Protection
Reserve energy
What types of cells make up adipose tissue
Adipocytes
Reticular tissue
Supportive
Where is reticular tissue found
Spleen
Liver
Lymph nodes
Bone marrow
What is reticular tissue made up of
Reticular fibers
macrophages
fibroblasts
Dense connective tissue types
Regular
Irregular
Elastic
Regular connective tissue examples
Tendons
Ligaments
Aponeuroses
What makes up regular connective tissue
Collagen fibers arranged in a parallel pattern
Fibroblasts provide strong attachments
Tendons
Connect bone to muscle
Ligament
Connect bone to bone
Aponeuroses
Connect muscle to muscle
Irregular connective tissue
Provide strength and support to areas experiencing force from all directions
Examples of irregular connective tissue
Dermis
Organ capsules
Joint capsules
Make up of irregular connective tissue
Collagen fibers arranged in an irregular pattern, elastic fibers, fibroblasts
Elastic Connective tissues
Ligaments that have a higher elastic fiber content than collagen content
Elastic connective tissue example
Equine nuchal ligament
Specialized cartilage types
Hyaline
Elastic
Fibrocartilage
Hyaline cartilage make up
Collagen fibers and chondrocytes
Examples of hyaline cartilage
Nose Trachea Larynx Embryonic skeleton Costal cartilage Articular cartilage
Elastic cartilage
Provides shape and great flexibility
Examples of elastic cartilage
Pinna
Auditory canal
Epiglottis
Elastic fibers
Fibrocartilage
Provides strong support
Examples of fibrocartilage
Intervertebral discs Pubic symphysis Disc in stifle Thick collagen fibers Chondrocytes
Types of membranes (3)
Mucous membranes
Serous membranes
Cutaneous membranes
Serous membranes
Line body cavities but do not connect the to the exterior world
Serous membrane characteristics
Simple squamous epithelium connected to loose connective tissue
Function of serous membranes
Reduce friction
Cutaneous membrane
Membrane exposed to the outside world
Characteristics of cutaneous membrane
Keratinized, stratified squamous epithelium
Attached to a layer of dense irregular connective tissue
Function of bones
Support soft tissues Protect vital organs Lever for muscle attachment Mineral storage Blood production
Types of bone (2)
Compact
Spongy
Compact bone
Provides strength and support
Very few spaces
Appears solid
Components to haversian system
Central haversian canal
Canaliculi
Lamellae
Lacunae
Central haversian canal
Houses blood vessels & nerves
Canaliculi
Very small canals in bone that radiate out and connect all lacunae to each other and haversian canal
Lamellae
Concentric rings of bone
Lacunae
Small spaces that house osteocytes / mature bone cells
Spongy bone
Large spaces of lattice-like bone / trabeculae filled with marrow
Diploe
Spongy bone of the skull
Appendicular skeleton
All bones in the limbs
Types of bone cells (3)
Osteoblast
Osteoclast
Osteocyte
Osteoblast
Immature bone cell
Produces bone matrix / osteoid
Osteocyte
Mature bone cell
Osteoclast
Very large, multinucleated cells that breakdown bone matrix
Classifications of bones (6)
Long bones Short bones Flat bones Pneumatic bones Irregular bones Sesamoid bones
Long bones
Diaphysis containing a marrow cavity with two epiphyses
Main supporting bones of the body
Articular cartilage
Hyaline cartilage that covers the ends of bones
Periosteum
Fibrous membrane that covers the outside of bones
Rich in blood, nerves, lymph vessels
Endosteum
Lines marrow cavity
Epiphyseal Cartilage
AKA growth plate
Region between epiphysis and diaphysis
Short bones
Two thin layers of compact bone with spongy bone between
Function of short bones
Shock absorption
Examples of short bones
Tarsus
Carpus
Flat bones
Two layers of compact bone with spongy bone between
Function of flat bones
Protection
Examples of flat bones
Pelvis
Scapula
Ribs
Many skull bones
Pneumatic bones
Contain sinuses
Play role in respiration in birds
Irregular bones
Unpaired bones with complicated shapes
Examples of irregular bones
Vertebra
Some skull bones
Sesamoid bones
Small short bones attached to tendons found near freely moving joints
Function of sesamoid bones
Reduce friction along a joint
Types of osteogenesis
Endochondral
Intramembranous
Endochondral osteogenesis
Formed from cartilage bars laid down in the embryo