Anatomy & Physiology Flashcards
Anatomy
Structure of body and its parts
Physiology
How the body functions
Prokaryote
cell without nucleus, ex: bacteria
Eukaryote
cell with nucleus and organelles
Cell Membrane
cell bodyguard; envelops cell, allows substances in/out
Cytoplasm
“filling” of the cell; holds everything except nucleus
Ribosome
RNA, site of protein synthesis
Mitochondria
“Powerhouse” of the cell, DNA, ATP production, found in skeletal muscles
ER (Endoplasmic Reticulum)
Rough or Smooth– rough=attached ribosomes that transports proteins and smooth=no attached ribosomes that synthesize cholesterol and transport fat
Golgi Apparatus
Stacked, saucer-shaped membranes that work as receiving, packaging, and distribution center and produces lysosomes
Lysosomes
Digest nutrients
Peroxisomes
detoxify substances; found in liver and kidney cells
Cytoskeleton
Gives cell its shape and structure and allows the cell to move
Centrioles
Base of cilia and flagella, helps organize mitotic spindle
Nucleus
“brain” of cell and contains DNA
Solute
Substance that can be dissolved
Solvent
Substance that does the dissolving
Solution
Combination of solute and solvent and they become one substance
Intracellular
Within a cell
Extracellular
Outside a cell
Intercellular
Between cells
Passive Processes
No energy expended by the cell
Diffusion
Movement of molecules from a high concentration to low concentration
Facilitated Diffusion
Diffusion with aid of carrier proteins
Osmosis
Movement of water through semipermeable membrane from low solute concentration to high solute concentration
Osmotic Pressure
Amount of pressure necessary to stop flow of water across membrane
Filtration
Substances forced through membrane by hydrostatic pressure– important in kidney function
Active Processes
Energy expended by the cell
Endocytosis
Materials taken into cell
Phagocytosis
“cell eating”
Pinocytosis
“cell drinking”
Receptor-mediated
Specialized membrane receptors bind to substances entering cell
Exocytosis
Materials expelled by the cell
Active Transport
Where molecules move from low concentration to high concentration of carrier proteins
Hypotonic
extracellular fluid is less concentrated than intracellular fluid (hemolysis)
Hypertonic
extracellular fluid is more concentrated than intracellular fluid (shrivel)
Isotonic
concentrations of extracellular and intracellular fluids are equal
Tissue
Groups of similar cells with related functions
Histology or Microanatomy
study of tissues
Four Primary Types of Tissue
Epithelial, Connective, Muscle, Nervous
Epithelial Tissue
Covers skin, lines body cavities, and forms active part of glands
Squamous Epithelium
Flat, thin, plate-like cells that line lungs, blood vessels, and thoracic and abdominal cavity
Cuboidal Epithelium
cube shaped cells that line the sweat, salivary, and mammary glands
Columnar Epithelium
Tall, rectangular cells that line the digestive system and female reproductive system
Pseudostratified Columnar Epithelium
Appear to be more than one layer, but all cells touch basal membrane; found in respiratory tract
Transitional Epithelium
Can resemble both cuboidal and squamous shapes, but found in urinary areas like the bladder
Glandular Epithelium
Specialized epithelial cells that secrete products– classified as endocrine (secrete hormones into bloodstream) or exocrine (secrete sweat from glands)
Connective Tissue
widely distributed throughout the body and composed of three elements: cells, fibers, and matrix
Collagen Fiber
white, long, straight, very strong fibers composed of collagen
Elastic Fibers
yellow, long, thin, branching, stretchy fibers composed of elastin
Reticular Fibers
fine collagen fibers in a complex network
Muscle Tissue
Skeletal, Smooth, and Cardiac
Skeletal (striated) Tissue
long, parallel fibers with multiple nuclei that attach to and move bones and allow voluntary control
Smooth Tissue
spindle shaped, smooth cells found in walls of digestive tract and blood vessels that lack bony attachments and have involuntary control
Cardiac Tissue
long, striated cells that are joined at points found only in the heart and have involuntary control
Nervous Tissue
tissue for conducting electrical impulses and are located in the brain, spinal cord, and nerves; composed of neurons and neuroglial cells
Mucuous Membranes
membranes that connect to the outside of the body that are made to absorb and secrete; ex: respiratory, digestive, urogenital pathways
Serous Membranes (serosa)
membranes that line body cavities and DO NOT connect to the outside of the body; ex: abdominal area and chest area
Cutaneous Membranes (integument or skin)
membranes exposed to external environment that provide protection
Cranial
toward the head
Rostral
toward the nose; used to describe structures on the head
Caudal
toward the tail
Dorsal
toward backbone
Ventral
away from backbone
Medial
closest to median plane or middle
Lateral
farthest from the medial plane
Proximal
the point closest to the backbone; used for reference to the limbs
Distal
the point furthest from the backbone; used for reference to the limbs
Anterior
toward the head; used in reference to limbs
Posterior
toward the tail; used in reference to limbs
Palmar
bottom of front foot
Plantar
bottom of rear foot