hw #1 and quiz #1 Flashcards
while a runner is in a marathon, his or her liver will have to free some stored energy to keep blood sugar levels adequate; the liver will liberate this energy by way of a process called
glycogenolysis
proteins are
polymers made up of amino acid monomers
what statement accurately describes amino acids?
there are twenty varieties, with each type having a different R group
the bond between adjacent amino acids is a(n)______bond
peptide
all organic compounds contain______, hydrogen, and usually oxygen
carbon
lipids
are a major component of the cell membrane
what type of organic molecule comprises the majority of a potato?
polysaccharides
chemical barriers composed of phospholipid bilayers form within biological systems because
hydrophobic exclusion results in the close positioning of the non polar tails
fatty acids in soap have a polar end and a nonpolar end. which of the following best describes these molecules?
Amphipathic
In the stable form of protein, what is generally oriented to the interior of the protein molecule?
Hydrophobic portions
the helix that forms in a protein chain as a result of hydrogen bonds and other weak forces is an example of
secondary structure of protein
what type of reaction occurs during protein synthesis to produce the primary structure of a protein?
dehydration synthesis
the R group for alanine is -CH3. Therefore, alanine is a ______amino acid
non polar
the primary sequence of a protein contains proline. what can you predict about its folded structure at that region?
there is a bend at that location
Monosaccharides, disaccharides, and polysaccharides are examples of
carbohydrates
visualizing the body in a ______ position is significant because all observers have a common point of reference when describing an discussing its regions.
anatomical or anatomic
which plane divides the body into superior and inferior portions?
Transverse plane
the visceral pleura______
covers the external surface of the lungs
the brain is in the _______
cranial cavity
the component of homeostasis, called the _____, is the sensory nerve body structure that detects changes in a variable, which is either the substances or process that is regulated
receptor
in the homeostatic control mechanism, the _____ _____ is the structure that interprets input from the receptor and initiates changes through the effector.
control center
characteristics of all living things
responsiveness to stimuli, reproduction, regulation of internal functions
the _______ pericardium forms the hearts external surface
visceral
true or false: sometimes a homeostatic imbalance occurs when a variable normally controlled by negative feedback is instead controlled by positive feedback
true