Midterm Chap 1-3, 7 & 8 Flashcards
Study of body function
Physiology
Study of body structure
Anatomy
Study of body surface by visualization and palpation (without “cutting”)
Surface anatomy
Study of anatomical structures visible to unaided eye, through “cutting”
Gross anatomy
Name the levels of organization, smallest to largest
Chemical - atomic, molecular Organelle Cellular Tissue Organ System Organelle
Basic structural and functional units of an organism
Cells
Group of cells that work together to perform a similar function
Tissues
Composed of two or more types of tissue
Organs
Related organs with common function
Organ system
Sum of all catabolic and anabolic chemical processes in the body
Metabolism
Equilibrium in the body
Homeostasis
What challenges homeostasis?
Physical insults (ie heat) Changes in internal environment Physiological stress (ie school or work)
Reverses a change in a controlled condition
Negative feedback (ie blood pressure)
Strengthens or reinforces change in controlled condition
Positive feedback (ie childbirth)
3 parts of feedback system are…
Receptor
Control center
Effector
System consists of skin and related structures (hair, nails, and glands)… Protects body, regulates temperature, and eliminates waste
Integumentary system
System made up of bones and joints, protects and supports the body, and houses cells that will become RBC and WBC
Skeletal system
System consists of skeletal muscles, smooth muscles, and cardiac muscles… Facilitates movement, maintains posture, and generates heat to maintain body temperature
Muscular system
System consists of brain, spinal cord, nerves and sensory organs… Senses and responds to body conditions through nerve impulses
Nervous system
System consists of hormone producing cells and glands scattered throughout the body… Regulates body through releasing hormones into the blood
Endocrine system
System consists of the heart, blood, and blood vessels… Carries blood and nutrients and regulates body temperature
Cardiovascular system
System consists of lymphatic fluid, lymph nodes, and lymphocytes (spleen, tonsils, and thymus gland also included)… Transports fats and proteins to cardiovascular system and protects against disease
Lymphatic system and immunity
System includes upper airways, trachea, bronchi and lungs
Respiratory system
System consists of esophagus, stomach, and intestines… Physical and chemical breakdown of food and eliminates waste
Digestive system
System includes kidneys, ureters, bladder and urethra
Urinary system
System includes ovaries, uterus, and vagina in females and the testes and penis in males
Reproduction system
Substance that cannot be broken down into simpler form
Chemical element
Units of matter
Atoms
What are found in the nucleus of an atom?
Protons and neutrons
What determines the atomic number?
Number of protons
What determines atomic weight?
Sum of protons and neutrons
Ions (ionic bonds) are formed when…
An atom gives up or gains an electron
Atoms that share electrons form…
Molecules
Free radicals are…
Electrically charged atom with unpaired electron in its outer shell
Unstable and highly reactive
Become stable by gaining or giving up electron
Atoms of molecules are held together by…
Chemical bonds
Cations are…
Positively charged ions that have given up (lost) an electron
Electron donors
Anions are…
Negatively charged ions that have gained an electron
Electron acceptors
What is the strongest chemical bond?
Covalent bonds
Covalent bonds are formed when…
Atoms of molecules share electrons
This type of bond is a weak interaction between hydrogen and adjacent electronegative atoms… They result from attraction of oppositely charged parts
Hydrogen bonds
Catalysts are…
Chemical compounds that speed up a reaction and are neither consumed or produced in the reaction
Name theses reactions:
- A + B -> AB
- AB -> A + B
- AB + CD -> AD + CD
- Synthesis, anabolism
- Decomposition, catabolism
- Exchange
Inorganic vs Organic molecules
Inorganic - simple molecules, usually lack carbon (ie water)
Organic - complex molecules, always contains carbon
What is pH?
Concentration of H+ in moles/l on scales of 0-14
pH < 7 acidic
pH > 7 base
Sugars, starches, glycogen, and cellulose containing carbon, hydrogen and oxygen that provide most of energy needed for life are…
Carbohydrates
_______ contain carbon, hydrogen and oxygen
Lipids
These lipids have 4 rings of carbon and include sex hormones, bile salts, some vitamins and cholesterol…
Steroids
This organic compound has a polar head and two non polar tails which makes it soluble in both water and fat…
Phospholipid
Proteins contain…
Carbon, hydrogen, oxygen and nitrogen
Most “human” organic compound
Made up of amino acids
______are proteins that speed up chemical reactions
Enzymes
DNA and RNA are…
Nucleic acids that make up our genetic code
Simple cells with no nucleus…
Prokaryotic cells
Complex cells that contain nucleus, plasma membrane and cytoplasm…
Eukaryotic cells
The “wall” of a cell, it is semipermeable and separates the cell’s internal environment from the external environment…
Plasma membrane
Gelatin-like substance that contains all of the cell’s components
Cytoplasm
The “brain” of the cell, contains DNA…
Nucleus
This transport process does not need energy, moves down/with concentration gradient…
Passive process
This transport process uses energy, goes against the concentration gradient…
Active process
Diffusion of water…
Osmosis
Facilitated diffusion is…
A passive process that requires a specific channel or carrier molecule
Spread of particles from areas of high concentration to areas of low concentration…
Diffusion