Chapter 1 Flashcards
Anatomy
the study of stucture - how things are built
Physiology
the study of function - how things work
Gross Anatomy
Visible with the naked eye
Microscopic Anatomy
Must use miscroscope
Systemic Anatomy
body systems. e.g. Cardiovascular
Developmental Anatomy
Structural changes from conception to death
Physiology Focus
mainly on function at the cellular and molecular levels
Neurophysiology
nervous system functions
Renal Physiology
Kidneys
Cardiovascular Physiology
Heart and Blood Vessels
Structural Organization Levels
Chemical, Cellular, Tissue, Organ, System, Organism
Chemical
atoms form to combine molecules
Cellular
cell is the basic unit of life, molecules combine to form cellular structures
Tissue
groups of cells with a common function
Organ
A group of two or more tissues forming a specific structure. e.g. heart consists of cardiac muscle and connective tissue
System
Two or more organs working toward a common goal. e.g. Cardiovascular is the heart AND blood vessels
Organism
one complete being
Necessary Life Functions
Maintain Boundaries, Movement, Responsiveness, Digestion, Metabolism, Excretion, Reproduction, Growth
Maintain Boundaries
keep internal environment separate from external environment
Movement
All activities caused by muscles
Responsiveness
Sensing Changes in environment
Metabolism
the sum of all the chemical rxns in the body.
BREAK DOWN - Large into small
BUILD LARGER- small into large
Excretion
removing wastes from the body (urinary system)
Reproduction
producing offspring
Growth
increase in organ or body size (cell numbers)
Survival Needs
Nutrients, Oxygen, Water Body Temperature, Atmospheric Pressure
Nutrients
chemicals for fuel and building blocks for growth
Carbohydrates
main fuel
Proteins
building blocks for new structures
Fats
lipids - energy storage and some building
Oxygen
required to “burn fuel” burn, create ATP oxidateive reactions
Water
the most abundant substance in the body
60-80% of body weight is water
required for and produced by chem rxns
Body Temperature
must be at 37 Centigrade (98.6F)
Body Temp too cold
chem rxns slow down
Body Temp too hot
enzymes that cauase chemical rxns to occur are temp dependant will break down
Maintaining body temp
body heat is mainly generated by skeletal muscles
Atmospheric Pressure
required to move respiratory gasses
Homeostasis
the maintenance of a relatively stable internal environment within limits
Homeostatic Control Mechanism Components
- Receptor - sensor that monitors ( e.g. thermoreceptor)
- Control Center - contains a set point responds to receptor (e.g. 37C)
- Effector - something that can bring about a change. (e.g. muscle shiver)
Negative Feedback Mechanisms
Heating and A/C systems
Eating a candy bar
Eating a Candy Bar
Candy bar ate…Blood glucose rises, insulin is released to cause cells to uptake glucose and blood glucose falls to normal
Positive Feedback Mechanisms
Rare in Normal Systems (blood clotting, oxytocin in childbirth are exceptions)
Positive feedback usually indicates pathology
Homeostatic Imbalance
Can be considered disease (pathological process)
Superior
above ; Toward the head end or upper part of a structure or the body
Inferior (caudal)
below; Away from the head end or twoard the lower part of a structure or the body
Anterior (ventral)
in front of ; toward or at the front of the body
Posterior (dorsal)
behind; toward or at the back of the body; behind
Medial
on the inner side of; toward or at the midline of the body
Lateral
on the outer side of; away from the midline of the body
Intermediate
Between a more medial and a more lateral structure
Proximal
closer to the origin of the body part of the point of attachment of a limb to the body trunk
Distal
farther from the origin of a body part or the point of attachment of a limb to the body trunk
Superficial (external)
toward or at the body surface
Deep (internal)
Away from the body surface; more internal`
Saggital Plane(and section)
divides the body into R and L portions
Midsagital
exactly on the midline
Parasagital
off the midline
Frontal (coronal) plane and section
divides the body into anterior and posterior portions
Transverse plane and section
divides the body into superior and inferior portions - cross section
Dorsal Cavity
closest to the posterior surface of the body
Cranial Cavity
Vertebral Cavity
Ventral Cavity
Anterior to dorsal - encloses internal organs
Thoracic Cavity
Superior part of ventral - ribs and muscles form wall contains pleural and pericardial cavities
Pleural Cavity
Lungs. R + L separate
Pericardial Cavity
Houses Heart, located within the mediastinum
Abdominopelvic cavity
inferior to thoracic - separated by diaphragm - abdominal and pelvic cavities
Abdominal Cavity
contains stomach, intestines, etc.
Pelvic Cavity
no true barrier between abdominal and pelvic cavities
Ventral Cavity Membranes
found on inner walls of the ventral cavity and outer surface of internal organs
Serous Membrane (serosa)
Double layered structure of ventral cavities only.
Parietal Serosa
line the inner walls of cavities
Visceral Serosa
covers surface of organs
Serous fluid
found in the potential space between visceral and parietal serosa - reduces friction caused by movment
Visceral Pericardium
found on heart surface
Parietal Pleura
lines cavitiy in which each lung resides.
Abdominopelvic serosa
peritoneum