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Chapter 1 and 2 Sobat
Basics
102
Physiology
Undergraduate 1
06/25/2011

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Term
Physiology
Definition
how parts work and carry out their life sustaining activities
Term
Anatomy
Definition
Structure of body parts and their relationship to one another
Term
responsiveness
Definition
ability to sense changes
Term
movement
Definition
activities promoted by the muscular system
Term
metabolism
Definition
all chemical reactions that occur within the body cells
Term
Level of hierarchy of organization
Definition
Organelles, Cells, Tissues, Organs, systems
Term
Cells
Definition
smallest units of living things
Term
organelles
Definition
basic components of cells
Term
tissues
Definition
groups of similar cells that have a common function
Term
organs
Definition
at least two tissues or more working together to perform a specific function for the body
Term
organ systems
Definition
organs that work together to accomplish a common purpose
Term
Digestion
Definition
breaking down of ingested food to simple molecules that can be absorbed into the blood
Term
excretion
Definition
removing wastes from the body
Term
reproduction
Definition
original cell divides producing two identical daughter cells that may then be used for body growth
Term
Acids
Definition
pH is 0-6.99, release H+ and are therefore proton donors, have higher H+ concentration and are therefore lower pH
Term
Homestasis
Definition
ability to maintain a relatively stable internal environment in an ever changing outside world
Term
Growth
Definition
increase in size of a body part
Term
Survival Needs
Definition
Nutrients, Water, Oxygen, Normal Body Temp, Atmospheric pressure
Term
Nutrients
Definition
chemical substances our body breaks down and converts to energy; needed for energy and cell building
Term
oxygen
Definition
20% of the air we breathe, necessary for metabolic reactions
Term
water
Definition
60-80% of the body; lost in excretion; provides the necessary environment for chemical reactions
Term
Normal body temperature
Definition
temperature at which all metabolic reactions occur naturally; if it falls below 98.6 F they become slower and slower
Term
atmospheric pressure
Definition
force our atmosphere exerts on our body; required for proper breathing and gas exchanges for the lungs
Term
3 components of control mechanisms
Definition
Receptor, control center, and effector
Term
Negative Feedback
Definition
output shuts off the original stimulus; returns it to its "ideal" value
Term
Positive Feedback
Definition
the output enhances or exaggerates the original stimulus; proceeds in the same direction as the initial change; uterine contractions
Term
Pericardial cavity
Definition
encloses the heart
Term
Thoracic cavity
Definition
divided into the mediastinum and the pericardial cavities
Term
Homeostatic imbalance
Definition
Disturbance of homeostasis or the body's normal equilibrium
Term
Parietal serosa
Definition
lines internal body walls
Term
Visceral serosa
Definition
covers the internal organs
Term
Serous membrane
Definition
separates the visceral serosa from the parietal serosa
Term
Superior
Definition
toward the head end or upper part of a structure; above
Term
inferior (caudal)
Definition
away from the head or toward the lower part of a structure; below
Term
Lateral
Definition
away from the midline of the body: on the outer side of
Term
medial
Definition
Toward or at the midline of the body; on the inner side of
Term
Ventral
Definition
toward or at the front of the body; in front of
Term
dorsal
Definition
toward or at the back of the body; behind
Term
Proximal
Definition
close to the origin of the body part or the point of attachment of a limb to the body trunk
Term
distal
Definition
farther from the origin of a body part of the point of attachment of a limb to the body trunk
Term
pericardial, pleural, peritoneal
Definition
heart, lungs, organs of the abdominopelvic cavity
Term
integumentary system
Definition
external body covering; protects deeper tissue from injury
Term
Skeletal system
Definition
Protects and supports body organs; provides a framework the muscles use to cause movement
Term
Muscular System
Definition
Allows manipulation of the environment , locomotion, and facial experessions; maintains posture and produces heat
Term
Nervous System
Definition
responds to internal and external changes by activating appropriate muscles and glands; fast acting control system
Term
Endocrine System
Definition
Secrete hormones that regulate processes such as growth, reproduction, and nutrient use by body cells
Term
Cardiovascular System
Definition
Heart pumps blood and Blood vessels transport blood, which carries O, C02, nutrients, wastes, etc
Term
Lymphatic System
Definition
Involved in immunity to foreign substances; picks up fluid leaked by blood vessels and returns it to the blood
Term
Respiratory System
Definition
Keeps blood constantly supplied with O and removes CO2
Term
Digestive System
Definition
Breaks down food into absorbable units that enter the blood for distribution to body cells
Term
Urinary System
Definition
Elimates nitrogenous wastes from the body; regulates water, electrolyte and acid base balance of the blood
Term
Sagittal Plane including the Median Plane
Definition
Cuts the body into right and left parts; Median is exactly in the midline
Term
Frontal Plane
Definition
divide the body into Anterior and posterior (Front and Back)
Term
Transverse Plane
Definition
horizontal plane that divides the body into superior and inferior parts
Term
Homestatic Mechanism
Definition

Receptor- Monitors the environment

Control Center- determines the set point to be maintained

Effector- provides the mean for the control center to maintain that set point

Term
Matter
Definition
anything that has mass and takes up space
Term
Element
Definition
mattter that can't be broken down into simpler substances by ordinary chemical methods
Term
Atom
Definition
identical building blocks of elements
Term
Energy
Definition
the capacity to do work
Term
kinetic energy
Definition
energy in action
Term
potential energy
Definition
energy of position; stored (inactive) energy
Term
Bulk elements of the body
Definition
Oxygen, Carbon, Hydrogen, Nitrogen
Term
Lesser bulk elements of the body
Definition
Calcium, Phosphorus, Potassium, Sulfur, Sodium, Chlorine, Magnesium, Iodine, Iron
Term
Trace elements
Definition
required in minute amounts, and are found as part of enzymes
Term
Neutron
Definition
have no charge and are inside of the nucleus
Term
Proton
Definition
have a positive charge and are found inside of the nucleus
Term
Electron
Definition
have a negative charge and are found orbiting the nucleus
Term
Nucleus
Definition
center of an atom that contains protons and electrons
Term
Atomic Number
Definition
The number of protons; this also is the same number of electrons, and therefore tells us the chemical behavior of the atom
Term
Atomic Weight
Definition
average of the mass numbers of all isotopes
Term
Radioisotope
Definition
atoms that undergo spontaneous decay called radioactivity
Term
Molecule
Definition
Two or more atoms held together by chemical bonds
Term
Compound (which is always a molecule)
Definition
Two or more different kinds of atoms chemically bonded together;
Term
Bases
Definition
release OH- and are proton acceptors, have a pH of 7.01-14, have lower H+ concentration and thefore a high pH
Term
Buffers
Definition
resist abrupt and large swing in the pH of body fluids
Term
Covalent Bond
Definition
formed by the sharing of two or more electrons which produces molecules
Term
Ionic Bond
Definition
formed between atoms by the transfer of one or more electrons which form crystals (NaCl- Sodium Chloride)
Term
Hydrogen Bonds
Definition
too weak to bind atoms together; gives molecules a three dimensional shape
Term
Single, Double, and Triple Covalent Bond
Definition
Based on the number of electrons shared in a covalent bond 1,2, or 3
Term
Octet Rule or Rule of Eights
Definition
Atoms interact so that they have 8 electrons in their outer shell (Valence Shell)
Term
Equation Product
Definition

result of reactants combining together in a chemical equation

 

Term
Reactants
Definition
a substance taking part in a chemical reaction
Term
Synthesis
Definition

Reaction where A + B=AB

bond formation

Term
Decomposition
Definition

Reaction where AB is broken down into A + B

Molecules broken down into smaller molecules

Term
Exchange Reactions
Definition

Reaction where AB + CD forms AC + BD

Bonds are made and broken down at the same time

Term
Catalyst
Definition
increase the rate of a reaction without being chemically changed
Term
Salt dissolving in water
Definition
dissociate into their component ions NaCl= Na and Cl
Term
Electrolytes
Definition
chemical substances that ionize and dissociate in water and are capable of conducting an electrical current
Term
Neutral
Definition
Is neither acidic or a base, has a pH of 7 (Water)
Term
Carbohydrates
Definition

Building blocks- Monosaccharides

Larger the molecule the less soluble it is in water

Term
Monosaccharides
Definition
building blocks of Carbohydrates; means simple sugar
Term
Disaccharides
Definition
A double sugar that is formed when two monosaccharides are joined by dehydration sytnthesis
Term
Polysaccharides
Definition
Many Sugars; 3 or more monosaccharides; fairly insoluble; great for storage
Term
Proteins
Definition

Building Blocks- Amino Acids

Consists of enzymes, hemoglobin and play vital roles in cell function

Term
Nucleic Acids
Definition

Building Blocks- Nucleotides

2 major classes: DNA and RNA

 

Term
Triglyceride
Definition
[image]
Term
Phospholipid
Definition
[image]
Term
Sterol
Definition
[image]
Term
Saturated Fats
Definition
A single covalent bond between carbon atoms is this type of fat
Term
Unsaturated Fat (Healthier)
Definition
Contain one or more double bonds between carbon atoms are said to be this type of fat
Term
Amino Acid
Definition

Building block of protein

 

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