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EEOB232
midterm 1
27
Physiology
Undergraduate 2
10/31/2011

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Term
cytokines
Definition
travel through the interstitial fluid
Term
krebs cycle..
Definition
occurs in the mitochondria
makes ATP via substrate level phosphorylation
Term
to communicate in a homeostatic control system..
Definition
neurotransmitters can travel via the interstitial fluid
cytokines can travel via the plasma
endocrines can travel via the plasma,
and juxtacrines can travel via the physical touching of cells
Term
a cell placed in a solution's volumes begins increasing therefore..
Definition
the solution is hypotonic and an osmotic pressure is not created
Term
overall cell metabolism equation
Definition
Equation 2
the product exclusively attributed to oxidative phosphorylation activity is H20
Term
During the hot summer months, your set point for body temperature is increased so that slightly less energy can be spent cooling the body. This alteration is an example of..
Definition
acclimatization to a warmer environment and
proactive action before a disturbance from steady state
Term
The nicotinic acetylcholine receptor is a transmembrane protein that, when bound by a compound called acetylcholine, changes its conformation to allow sodium to move through it and across the plasma membrane.. Therefore the receptor can be classified as..
Definition
ligand-gated ion channel
Term
You have two fluid-filled compartments (A and B) that contain equal volumes of water and are separated by a sliding membrane that is permeable to water and sodium. To increase the rate of sodium diffusion from compartment A toward compartment B, you should..
Definition
-add more sodium ions into compartment A
-decrease the thickness of the membrane between the compartments
-add more water to compartment B
Term
Due to disease, a friend had a quarter of her liver removed. Although her prognosis is for a full recovery, she does not understand how she can live with only a fraction of her liver. You correctly tell her that it is because..
Definition
the redundancy of the components within her liver and, unlike her heart, her liver has multiple functional units.
Term
Correct statements about how the three main categories of extracellular messengers could be regrouped are..
Definition
that paracrine and neurotransmitter could be combined because only they use the interstitial fluid

endocrine and neurotransmitter could be combined because neurons release the majority of them.
Term
aquaporins
Definition
allow water tro move across the plasma membrane
allow water to move with its gradient
allow for movement into or out of the cell
Term
pharmaceuticals
Definition
designed to beable to readily move across the plasma membrane in order to be quickly absorbed
these compounds should be hydrophobic-lipophilic-nonpolar and small.
Term
if you were to remove oxygen from a cell the first process to be inhibited would be..
Definition
the electron transport chain
Term
microglial cells
Definition
macrophage-like for immune
Term
astrocytes
Definition
eliminate neurotransmitters
Term
repolarizing
Definition
When a cell’s membrane potential is becoming more negative but is still greater than the resting potential
Term
graded potentials
Definition

-change in the membrane potential are a form of electrical signal

-occupy a small region of the plasma membrane

-local change in ion flow

Term
For a cell to increase the likelihood of receiving lipophobic messages it should..
Definition
exocytose its membrane-bound receptors
Term
membrane-bound receptors
Definition
they bind polar ligands
the ligand staysin the interstitial fluid
their activation can result in protein synthesis
their ligands do not need a plasma binding protwin
Term
sodium-potassium pump
Definition
it is a coutertransporter
it is a membrane0bound transporter
it directly requires the catabolism of ATP
it moves both sodium and potassium against their gradients
Term
ATP will be used to complete the transport in..
Definition
both exo/endocytosis and both types of active transport
Term
When the alpha subunit of a G protein is released and interacts with the effector protein...
Definition
GTP is converted to GDP and Pi and energy and the effector protein opens or activates.
Term
active transport
Definition
primary active transport uses ATP directly
cotransport has the two things moving in the same direction,
secondary active transport has one of its ions moving with its concentration gradient
Term
membrane voltage (Vm)
Definition
that it indicates the voltage (i.e., electrical) gradient across the cell membrane
it is the sum of the equilibrium potentials for all ions
Term
astrocytes
Definition
they remove potassium from around the neurons
they regulate the blood-brain barrier
they are extremely important in fetal and early childhood
Term
An ion has a higher concentration outside of a typical cell..
Definition
When it’s ion-channel is opened in the plasma membrane, the ion will have an undeterminable direction of diffusion because we do not know its charge
Term
Correct statements about neurons..
Definition
that dendrites and collaterals increase the surface area of a neuron
axons typically deliver information to effector cells such as glands
smaller and more numerous glial cells support larger and less numerous neurons
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