Semester Exam 1
Medical Pharmacology & Physiology 3202 with Hurley at University of Missouri- Columbia
About this deck
By: Brittany Gordon
Created: 2012-05-05
Size: 45 flashcards
Views: 26
Created: 2012-05-05
Size: 45 flashcards
Views: 26
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What is physiology
It is the study of how the parts of the body work
What is homeostasis
It is the ability of living things to maintain a relatively constant internal enviornment
What is a negative feedback system
It is a system in which changes in one variable initiate evens that ten d to return that variable to its original value
Both negative and positive feedback systems promote homeostasis but positive feedback systems are more numerous
FALSE
Which of the following chemical bonds are ordered correctly from weakest to strongest
Hydrogen bond, ionic bond, covalent bond
What do Cl-, HcO3- and PO43- have in common
They are all anions
How is a hydrogen bonds best described
It is formed when a polar area of one molecule binds to an area of opposite polarity on another molecule
Which units are correctly ordered from largest to smallest
Mole (M), millimole (mM), Micromole (uM)
What is an ampipathic compound
One with polar and non-polar areas on the same molecule
Which class of compounds are the most structurally diverse and functionally versatile
Proteins
Which compound is ampithatic
Phospholipid
What is glycogen
It is the principal storage form of carbohydrates in animals
Cholesterol is a component of the plasma membrane as well as being the precursor of the steroid hormones, the bile salts and vitamin D
TRUE
How is the primary structure of a protein best described
All of the above describe the primary structure of a protein
Agranular (smooth) endoplasmic reticulum
Site of fatty acid synthesis and Ca2+ storage
Plasma membrane
Regulates what enters and leaves cells
Golgi apparatus
Site of protein processing and storage in granules
Pluripotent stem cells differentiate to form all the different kinds of cells and that differentiate is normally irreversible
TRUE
How are phospholipids best described
All the above describe phospholipids
The process of diffusion requires no energy but it is too slow to supply the needs of multicellular organism
TRUE
Which compounds would enter a cell by simple diffusion most slowly
A large, polar compound
Which limits they entry into a cell by facilitated diffusion
The number of the compound's transporters
The Na+-K+ ATPase pump produces low Na+ and high K+ concentrations inside cells and also produces a separation of charge across the plasma membrane
TRUE
The Ca2+ ATPase pump produces a Ca2_ concentration inside cells that is much higher than the Ca2+ concentration outside cells
FALSE
WHat best describes an active transport system
It moves a solute against its concentration gradient
What effect will an isotonic solution have on cell volume
There will be no change in cell volume
According to Ohm's Law how will electrical current change if both voltage and resistance are doubled
It will not change
The only things needed for an ion to establish a transmembrane voltage are a difference in concentration of the ion across the membrane and the membrane must be permeable to the ion
TRUE
What effect would an ion have on a cell's resting membrane potential if that ion's concentration were the same inside and outside the cell
The ion would have no effect on resting membrane potential of the cell
What establishes the resting membrane potential of cells
Diffusion of K+ out of the cell down its concentration gradient
What is calculated by the Nerst equation?
The transmembrane voltage that stops diffusion of an ion
According to the Nerst equaation, what is the equilibrium potential for ion-X if its concentration outside the cell is 10mM and inside the cell is 1.0mM
-118 mv
Ion A+ has an equilibrium potential of -50 mv and ion B+ has an equilibrium potential of 50 mv. A cell at rest is permeable only to ion A+. How would the cell's transmembrane potential change if it become permeable only to ion B+.
It would change from -50 mv to 50 mv
How is a graded membrane potential best described
It varies with the intensity of the stimulus
In a neuron all graded potentials are sub threshold
TRUE
What is responsible for the absolute refractory period
Voltage-gated Na+ channels are opening, closing, and returning to their resting conformation
Dendrite
Receives input from other neurons
Nerve terminal
It is the site of neurotransmitter storage and release
Axon
Where the action potential is propagated
What is a gap junction?
It is a structure through which ions pass at an electrical synapse
What is found at a motor end plate?
Receptors for acetylcholine linked to ion channels
How does synaptic transmission at the myoneural (neuromuscular) junction differ from synaptic transmission in the central nervous system
The only neurotransmitter at the myoneural junction is acetylcholine but there are many different neurotransmitters in the central nervous system
What would be the effect of a drug that prevent the action of acetylcholinesterase
The stimulation of skeletal muscle cells would be prolonged
About how many excitatory post-synaptic potentials (ESPs) are needed for a central nervous system neuron to reach threshold
15-30
A skeletal muscle cell is innervated by a single alpha motor neuron but a cell in the central nervous system may get input from many other neurons
TRUE
About this deck
By: Brittany Gordon
Created: 2012-05-05
Size: 45 flashcards
Views: 26
Created: 2012-05-05
Size: 45 flashcards
Views: 26
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“Simply amazing. The flash cards are smooth, there are many different types of studying tools, and there is a great search engine. I praise you on the awesomeness.”
Dennis
Dennis