exam Flashcards
Responsiveness is also known as
Excitability
Terminologia Anatomica
Included Latin and commonly used English terms. Devised in 1998
Nomina Anatomica
Purged eponyms from terminology and included only Latin terms. Devised in the late 1800s
Corpora is the plural form of
Corpus
Cortices is the plural form of
Cortex
Ganglia is the plural form of
Ganglion
The scientific method is based on an informed conjecture that is capable of being tested and potentially proven false by experimentation or data collection.
False
The scientific method is
is a way of disciplined reasoning that includes observation, hypothesizing, experimentation, and conclusions. This statement refers to an hypothesis.
Tissues are more complex than organs
False
Organs are composed of
Tissues
Organisms are composed of
Composed of Organ System
Organ System are composed of
Composed of Organs
Tissues are composed of
Composed of Cells
Cells are composed of
Partially of organelles
Organelles are composed of
Composed of molecules
Molecules are composed of
Composed of atoms
Organ Systems
- A group of organs with a unique collective function.
- Integumentary, Skeletal, Muscular, Nervous, Endocrine, Circulatory, Lymphatic, Respiratory, Urinary, Digestive, and Reproductive
Organ
Structure composed of two or more tissue types that work together
Tissue
- Is a mass of similar cells and cell products that form a discrete region of an organ and performs a specific function
- Epithelial, Connective, Nervous, and Muscular Tissue
Cells
- Smallest unit of an organism that carry out all the basic functions of life; nothing simpler than a cell is considered alive
- One nucleus
Organelles
- Microscopic structures is a cell that carry out its individual function
- ex. Mitochondria, centrioles, and lysosomes
The study of tissues
Histology
Changes in the environment, to which organisms respond
Stimuli
Metabolism
- Living things take in molecules from the environment and chemically change them into molecules that form their own structures, control their physiology, or provide them with energy
- Sum of all chemical reactions in the body
- Includes reactions where molecules are broken down
- Also includes reactions where new molecules are synthesized
Responsiveness and Movement
The ability to react to stimuli, which is also called responsiveness or excitability
Homeostasis
The ability to maintain internal stability
Development
Any change in form or function over the lifetime of the organism
Reproductive
All living organism can produce copies of themselves, thus passing their genes on to new, younger, containers-their offspring
Evolution
All living species exhibit genetic change from generation to generation
Physiology
Study of function
Neurophysiology
Physiology of the nervous system
endocrinology
Physiology of hormones
Pathophysiology
Mechanisms of disease
Comparative Physiology
Study of how biological processes cary in different animal species
Histopathology
Examines tissues for disease
Macromolecules
- Largest molecules
- Proteins, fats, and DNA
- Carbohydrates, proteins, and nucleic acids are examples because they are made up of many repeating subunits.
Natural Selection
Some individuals within a species have hereditary advantages over their competitors
Receptor
A structure that senses a change in the body, such as the stretch receptors that monitor blood pressure
Positive feedback
Self-amplifying cycle in which a physiological change leads to even greater change in the same direction
Down the gradient
Matter or energy moves from a higher value to a lower value
Up the gradient
Matter or energy moves from a lower value to a higher value
Integration Center
Processes information, relates it to tother information, and makes a decision of what a response should be
Negative feedback
Mechanisms reverse the initial stimulus
Physiological Gradient
A difference in chemical concentration, electrical charge, physical pressure, temperature, or other variable between one point and another
Anatomy
Study of body structure
Excitability
The ability of nerve and muscle cells to produce quick reactions
Element
Simplest form of matter to have unique chemical properties
Atomic Number
Number of protons in the nucleus
Protons
- Single positive charge
- P^+
Neutrons
- No charge
- N^0
Atomic Mass
Element approximately equal to its total number of protons and neutrons
Electrons
- Tiny particles with a single negative charge and very low mass
- E^-
Valance Electrons
- Electrons of the outermost shell
- Determine the chemical bonding properties of an atom
isotopes
Elements that differ from one another only in number of neutrons and therefore in atomic mass
Deuterium
One proton and one neutron
Tritium
One proton and two neutrons
Atomic weight
- Relative atomic Mass
- Accounts for the fact that an element is a mixture of isotopes
Radioisotopes
- Unstable Isotopes
- Every element has at least one
Radioactivity
Process of decay
Ionizing Radiation
High-energy radiation, such as that emitted by radioisotopes, ejects electrons from atoms, converting atoms to ions
Alpha Particle
- Two protons and two neutrons
- Too large to penetrate the skin
Beta Particle
- Free electron
- Only penetrate a few millimeters
Ions
- Charges particles with unequal numbers of proton and electrons
- An atom that has gained or lost electrons
Anion
Particles that gain electrons acquire a negative charge
Cation
Loses electrons acquires a positive charge
Electrolytes
Substances that ionize water and form solutions capable of conducting electricity
Free Radicals
Unstable, highly reactive chemical particles with and odd number of electrons
Antioxidant
Chemical the neutralizes free radicals
Molecules
Chemical particles composed of two or more atoms united by a chemical bond
Compounds
Molecules compose of two or more elements
Isomers
Molecules with identical molecular formulae but different arrangements of their atoms
Molecular weight
The sum of atomic weights of its atoms
Chemical bonds
A molecule held together and molecules are attracted to one another
Ionic bond
- Relatively weak attraction between and anions and cation
- Easily disrupted in water, as when salt dissolves
Covalent bonds
Sharing one or more pairs of electrons between nuclei
Single covalent
Sharing of one electron pair
Double covalent
- Sharing of two electron pairs
- Often occurs between carbon atoms, between carbon and oxygen, and between carbon and nitrogen
Nonpolar covalent
- Covalent bone in which electron are equally attracted to both nuclei
- May be single or double
- Strongest type of chemical bond
Polar covalent
- Covalent bond in which electrons are more attracted to one nucleus than the other, resulting in a slightly positive and negative region in one molecule
- May be single or double
Hydrogen bond
- Weak attraction between polarized molecules or between polarized regions of the same molecule
- Important in the three dimensional folding and coiling of large molecules
- easily disrupted by temperature and pH change
Mixture
Consists of substances that are physically blended but not chemically combined
Solvency
- The ability to dissolve other chemicals
- Water is called the universal solvent because it does dissolve at a broader range of substances than any other liquid
Hydrophilic
Substances that dissolve in water, such as sugar
Hydrophobic
Fats that do not dissolve in water
Adhesion
Tendency of one substance to cling to another
Cohesion
The tendency of molecules of the same substance to cling to each other
Chemical Reactivity
Waters ability to participate in chemical reactions
Solution
Consists of particles of matter caller the solute mixed with a more abundant substance called the solvent
Acid
Any proton donor, a molecule that releases a proton H+ in water
Base
A proton acceptor
Acidity
- Expressed in terms of pH
- A measure derived from the molarity go H+
Neutral
Solutions with the pH of 7
Acidic
Solutions with the pH below 7
Basic
- Alkaline
- Solutions with pH above 7
Molarity
- One mole of a chemical is the number of grams equal to its molecular weight
- Molarity is a measure of the number of moles of solute per liter of solution
Energy
The capacity to do work
Work
Move something, whether is a muscle of a molecule
Kinetic Energy
Energy of motion, energy that is doing work
Chemical energy
Potential energy stored in the bonds of molecules
Electrical Energy
Both potential and kinetic forms
Heat
Kinetic energy of a molecular motion
Temperature
The rate of which molecules are moving