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SLCC 2420 PHYSIOLOGY- GREEN – SPRING-FINAL EXAM QUESTIONS AND ANSWES
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SLCC 2420 PHYSIOLOGY- GREEN – SPRING-FINAL EXAM QUESTIONS AND ANSWES
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SLCC 2420 PHYSIOLOGY- GREEN –SPRING-FINAL EXAM QUESTIONS AND
ANSWES
Body fluid compartment numbers - Answer-*TBW* (Total Body Water) = 42 L
*ICF* (Intracellular Fluid) = 28 L
*ECF* (Extracellular Fluid) = 14 L
*Plasma* = 3 L
*ISF* (Interstitial Fluid) = 11 L
Core body temp set point: - Answer-98.6 F
37.0 C
Resting potential of a neuron: - Answer--70 mV
Threshold of a neuron: - Answer--55 mV
Typical MAP (Mean Arterial Pressure:) - Answer-85 mm Hg
Typical GFR (Glomerular Filtration Rate:) - Answer-125 ml/min =
180 L/day
Number of cells in the body: - Answer-37 trillion
Number of cells in the nervous system: - Answer-1 trillion (90% are glia)
CO, HR, and SV in healthy resting adult: - Answer-(5 L/m = 72b/m x .07 L/b)
Cardiac Output = Heart Rate x Stroke Volume
Chemical Classification of Messengers - Answer-A messenger's chemical structure
determines its mechanisms of synthesis, release, transport, and signal transduction.
Lipophilic (Hydrophobic) - Answer-Molecules are lipid soluble and readily cross the
plasma membrane, but do not dissolve in plasma.
Lipophobic (Hydrophilic) - Answer-Water soluble and dissolve in plasma but do not
cross the plasma membrane.
Amino Acids - Answer-Ex. Glutamate, aspartate, glycine, GABA
-Function as neurotransmitters in the brain and spinal cord
-AA are used in protein synthesis
-Lipophobic (dissolve in water, but do not cross plasma membranes)
-Target cell in plasma membrane
, Amines - Answer--Chemical messengers derived from amino acids and possess an
amine group (-NH2)
-Include the group Catecholamines.
-Amines are HYDROPHILIC except for thyroid hormones
-Target cell in plasma membrane
Catecholamines - Answer-Derived from AA tyrosine, include dopamine, norepinephrine,
epinephrine.
Target cell in plasma membrane
Dopamine & Norephinephrine - Answer-Function primarily as neurotransmitters
Target cell in plasma membrane
Epinephrine - Answer-Functions primarily as a hormone
Target cell in plasma membrane
Serotonin - Answer-Is a neurotransmitter derived from tryptophan
Target cell in plasma membrane
Thyroid hormones - Answer-Derived from tyrosine, HYDROPHOBIC/LIPOPHILIC
Target cell in nucleus
Histamine - Answer-Derived from histidine
Target cell in plasma membrane
Peptide/Protein Messengers - Answer-Most chemical messengers are polypeptides
(chains of amino acids linked together by peptide bonds)
-Classified as peptides or proteins based on size
Target cell in plasma membrane
Peptide - Answer-Chains with less than 50 amino acids
Target cell in plasma membrane
Protein - Answer-Longer chains of amino acids
Target cell in plasma membrane
Polypeptides - Answer-are hydrophilic / lipophobic
Target cell in plasma membrane
Steroid Messengers - Answer--Derived from cholesterol
-Function as hormones
-Hydrophobic / lipophilic
-Targets receptors in cytosol
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