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Anatomy and Physiology

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purines - answer-double ring nitrogenous base: adenine, guanine C6H12O6 + 6O2 - 6 CO2 +6H2O - answer-equation for respiration, CO2 is exhaled, H2O mostly used in the body proteins - answer-polymers that are made of amino acid monomers with an amine and carboxylic acid functional group, amino acids bond together with peptide bonds (dehydration reaction OH- from carboxylic acid, H from amine group glycoproteins - answer-proteins with a carbohydrate attached primary structure - answer-linear sequence of amino acids in a protein secondary structure - answer-shows beta pleated sheets and alpha helices tertiary structure - answer-3d shape, globular or fibrous protein quaternary structure - answer-shown in some complex proteins; two or more proteins associate to form a final protein acid - answer-donates H+ base - answer-donates OH- kinetic energy - answer-energy of motion potential energy - answer-energy of the position role of enzymes - answer-lower activation energy in chemical reactions, substrate enters active site, induced fit occurs, enzyme stressed substrate bonds, lowering activation energy and facilitating the chemical reaction to occur plasma membrane - answer-forms the outer limiting barrier separating the internal contents of the cell from the external environment; made up of phospholipid bilayer, nucleus - answer-largest structure within the cell and is enclosed by a nuclear envelope. Contains genetic material, DNA, the fluid within the nucleus is called the nucleoplasm, nucleolus is dark staining body cytoplasm - answer-all cellular contents between the nucleus and cell membrane cytosol - answer-intracellular fluid, high water content organelles - answer-little organs- complex organized structures within cells; unique characteristic shapes and functions diffusion - answer-net movement of substance from where it is more concentrated to where it is less concentrated facilitated diffusion - answer-assists small solutes that are charge or polar into the cell past the phospholipid bilayer; occurs through channel mediated diffusion- water filled protein channels; carrier diffusion- assisted by carrier proteins osmosis - answer-the passive movement of water through a selectively permeable membrane; occurs to even out concentrations in and out of cell active transport - answer-opposes the movement of solutes by diffusion and prevents the distribution of dissolved substances from reaching equilibrium; moves a substance against a concentration gradient Ex) sodium potassium pump- ion pump concentration gradients- moves Na+ continuously out the cell and K+ into the cell; must expend ATP to do this; maintains electrochemical gradient which gives cell potential energy isotonic - answer-the cytosol and the solution have the same relative concentration hypotonic - answer-the solution has a lower concentration of solutes and there is a higher concentration of water then in the cytosol--- entry of water into the cell occurs lysis can occur hypertonic - answer-higher concentration of solutes and thus a lower concentration of water than in the cytosol-- water will leave the cell; crenation- cell shrinkage secondary active transport - answer-synport- same direction, antiport- different direction; movement of Na+ or K+ with its gradient provides enough energy to move substance in either direction endocytosis - answer-the cellular uptake of large substances or large amounts of substances from the external environment into the cell; used for digestion; pocket in cell membrane occurs to take in vesicle that forms on cell surface- this is called invagination exocytosis - answer-the means by which either large substances are secreted from the cell; macromolecules like proteins and polysaccharides are too large to be moved across the membrane even with the assistance of transport proteins; intracellular transport vessicles; vessicle fuses with plasma membrane to release contents pinocytosis - answer-cellular drinking; occurs when the cell internalizes droplets of interstitial fluid that contain dissolved solutes; multiple small vesicles are formed to come into the

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Anatomy and Physiology 1 Exam 1
anatomy - answer-study of structure and form; derived from Greek word Anatome which means
to cut apart or dissect; Anatomists study structure and form of organisms studying the
relationships among parts of the body and the structure of individual organs

physiology - answer-the study of function of the body parts; physiologists examine how organs
and body systems function under normal circumstances as well as how their functions are
altered with medication or disease

branches of anatomy - answer-microscopic- structures that cannot be observed to the unaided
eye
(cytology- study of body cells and their internal structure;
histology- study of tissues)
gross anatomy- structures that can be observed to the unaided eye,; macroscopic
(systemic anatomy- anatomy of each body system;
regional anatomy- examines all of the structures in a particular region of the body as a complete
unit)

embryology - answer-discipline concerned with developmental changes occurring from
conception to birth

comparative A&P - answer-examines similarities and differences of anatomy and physiology of
different species

pathophysiology - answer-relationship between the functioning of an organ system and disease
or injury to that organ system

basic qualities of life - answer-organization- each organism has a complex structure and order
metabolism- the sum of all chemical reactions to occur within a body; anabolism (smaller
molecules form larger) and catabolism (larger molecules are broken down to smaller)
growth and development- each organism assimilates materials from its environment and often
grows and develops
responsiveness- ability to sense and react to stimuli
regulation- ability to adjust or direct internal bodily function in the face of environmental
changes- homeostasis- ability of an organism to maintain a consistent internal environment

organization of the human body - answer-chemical level- consists of atoms, molecules,
macromolecules, and organelles
cell level- consists of cells, made up of structures and molecules from chemical level
tissue level- made up of tissues which are made of cells
organ level- made up of organs made up of 2-3 tissue types that work together for specific,
complex functions
organ system level- organs that work together to coordinate activities and achieve a common
function

, anterior - answer-in front of

posterior - answer-in back of

dorsal - answer-on the backside of the human body

ventral - answer-on the belly side of the human body

superior - answer-closer to the head

inferior - answer-closer to the feet

deep - answer-on the inside

superficial - answer-on the outside

homeostasis - answer-refers to the ability of an organism to maintain a consistent internal
environment or "steady state"; for example if the body gets hot due to external temperature, the
body maintains a steady state by circulating more blood toward the surface to facilitate heat
loss; nervous system regulating blood pressure when you get out of bed in the morning
receptor- detects changes in variable; either substance or process stimulus
control center - interprets input from the receptor and initiates change through the effector;
parathyroid hormone monitors calcium levels
effector- structure that brings about the change to alter the stimulus; muscles in the lungs that
bring air flow

positive feedback - answer-set point-- what is normal
action occurs that reinforces the response; mother breast feeds baby: suckling causes receptors
to signal to hypothalamus to release oxytocin causing breast tissue to produce milk

negative feedback - answer-detecting a change and then initiating the opposite response to
return to the set point (if it's hot, bringing heat to the surface of the skin so the body loses heat,
if cold withdrawing blood to vessels, skeletal muscles shiver, no sweat, withdraw foot when
stepping on glass)

atoms - answer-protons (+1 charge), neutrons, and electrons (very little weight)
atomic number is based on protons
amu is based on protons and neutrons

types of chemical bonds - answer-ionic bond- bond that transfers electrons, stronger; form salts
covalent bond- bond that shares electrons, weaker, can be single, double, triple; form molecular
compounds

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