1
IPC 1 - EXAM 1 - Calcium and
Phosphate Homeostasis Questions
and Answers (100% Correct
Answers) Already Graded A+
Provides structural integrity of the skeleton, Essential to
© 2026 Assignment
normal function of a host of biochemical processes Ans:
Ca2+
Guru01 - Stuvia
Expert
Neuoromuscular excitability, Blood coagulation, Hormonal
secretion, Enzymatic regulation are processes dependent of
Ans: Ca2+
Stored in mitochondria and ER Ans: Bound Intracellular Ca2+
Concentration is approximately 1/1,000th of extracellular
concentration Ans: Free Intracellular Ca2+
"Pump-leak" transport systems control levels of Ans: Free
Intracellular Ca2+
When _________ falls below normal, the nervous system
becomes progressively more excitable because of increase
permeability of neuronal membranes to sodium Ans:
Extracellular Ca2+
Concentration is about 9.0 - 10.5 mg/dL Ans: Extracellular
Ca2+
Biologically active form Ans: Ionized Ca2+
, 2
40% of extracellular (plasma) Ca2+ Ans: Ionized Ca2+
50% of extracellular (plasma) Ca2+ Ans: Protein-bound Ca2+
10% of extracellular (plasma) Ca2+ Ans: Ca2+ salts
Citrate and phosphate are types of Ans: Ca2+ salts
Acute alkalosis increases calcium binding to protein and
decreases _____ Ans: Ionized Ca2+
© 2026 Assignment
Patients who develop acute respiratory alkalosis have
Guru01 - Stuvia
increased neural excitability and are prone to seizures due to
Expert
low _____ in the extracellular fluid which results in increased
permeability to sodium ions Ans: Ionized Ca2+
There is a total of 1,000,000 mg of ____ in the bone Ans: Ca2+
There is a total of 600,000 mg of ____ in the bone Ans: PO4
Phosphate Ans: PO4
Calcium and ______ concentrations are tightly controlled Ans:
PO4
Precipitates out of solution if its solubility is exceeded Ans:
CaPO4
Is an essential mineral necessary for ATP, cAMP second
messenger systems, and other roles Ans: PO4
normal plasma concentration is 3.0-4.5 mg/dL. 87% is
diffusible, with 35% complexed to different ions and 52%
ionized Ans: PO4
IPC 1 - EXAM 1 - Calcium and
Phosphate Homeostasis Questions
and Answers (100% Correct
Answers) Already Graded A+
Provides structural integrity of the skeleton, Essential to
© 2026 Assignment
normal function of a host of biochemical processes Ans:
Ca2+
Guru01 - Stuvia
Expert
Neuoromuscular excitability, Blood coagulation, Hormonal
secretion, Enzymatic regulation are processes dependent of
Ans: Ca2+
Stored in mitochondria and ER Ans: Bound Intracellular Ca2+
Concentration is approximately 1/1,000th of extracellular
concentration Ans: Free Intracellular Ca2+
"Pump-leak" transport systems control levels of Ans: Free
Intracellular Ca2+
When _________ falls below normal, the nervous system
becomes progressively more excitable because of increase
permeability of neuronal membranes to sodium Ans:
Extracellular Ca2+
Concentration is about 9.0 - 10.5 mg/dL Ans: Extracellular
Ca2+
Biologically active form Ans: Ionized Ca2+
, 2
40% of extracellular (plasma) Ca2+ Ans: Ionized Ca2+
50% of extracellular (plasma) Ca2+ Ans: Protein-bound Ca2+
10% of extracellular (plasma) Ca2+ Ans: Ca2+ salts
Citrate and phosphate are types of Ans: Ca2+ salts
Acute alkalosis increases calcium binding to protein and
decreases _____ Ans: Ionized Ca2+
© 2026 Assignment
Patients who develop acute respiratory alkalosis have
Guru01 - Stuvia
increased neural excitability and are prone to seizures due to
Expert
low _____ in the extracellular fluid which results in increased
permeability to sodium ions Ans: Ionized Ca2+
There is a total of 1,000,000 mg of ____ in the bone Ans: Ca2+
There is a total of 600,000 mg of ____ in the bone Ans: PO4
Phosphate Ans: PO4
Calcium and ______ concentrations are tightly controlled Ans:
PO4
Precipitates out of solution if its solubility is exceeded Ans:
CaPO4
Is an essential mineral necessary for ATP, cAMP second
messenger systems, and other roles Ans: PO4
normal plasma concentration is 3.0-4.5 mg/dL. 87% is
diffusible, with 35% complexed to different ions and 52%
ionized Ans: PO4
