Question 1

The bo ne m ine ra l ha s th e e m pir ica l for m ula

Accepted Answer

A)  Ca10 (PO4)6 (OH )2 
B)  Ca3(PO4 )2 
C)  Ca4 (HPO4 )2 
D)  Ca(HCO3)2 
E)  CaCO3 
A)  Ca10 (PO4)6 (OH )2 
B)  Ca3(PO4 )2 
C)  Ca4 (HPO4 )2 
D)  Ca(HCO3)2 
E)  CaCO3

Question 2

Vitamin D is activated by

Accepted Answer

A)  Hydroxylation at the 25 position in the liver 
B)  Hydroxylation at the 1 position in the liver 
C)  Hydroxylation at the 1 position in the kidney 
D)  Hydroxylation at the 25 position in the kidney 
E)  Both A and C are true 
A)  Hydroxylation at the 25 position in the liver 
B)  Hydroxylation at the 1 position in the liver 
C)  Hydroxylation at the 1 position in the kidney 
D)  Hydroxylation at the 25 position in the kidney 
E)  Both A and C are true

Question 3

Calcium and Phosphorus homeostasis are linked because

Accepted Answer

A)  Both Ca and Phosphate are released when bone is resorbed 
B)  Both Ca and Phosphate are in the urine 
C)  Ca complexes with phosphate in the blood 
D)  Both Ca and Phosphate are absorbed in the intestine 
E)  Both A and C are true 
A)  Both Ca and Phosphate are released when bone is resorbed 
B)  Both Ca and Phosphate are in the urine 
C)  Ca complexes with phosphate in the blood 
D)  Both Ca and Phosphate are absorbed in the intestine 
E)  Both A and C are true

Question 4

Vitamin D is a

Accepted Answer

A)  Single chain peptide hormone 84 amino acids long 
B)  Glycopeptide 
C)  Complex of two peptides, an A and a B chain, linked by disulfide bonds 
D)  Modified am ino acid 
E)  Steroid-like hormone 
A)  Single chain peptide hormone 84 amino acids long 
B)  Glycopeptide 
C)  Complex of two peptides, an A and a B chain, linked by disulfide bonds 
D)  Modified am ino acid 
E)  Steroid-like hormone

Question 5

The fraction of plasma calcium that is bound to protein is about

Accepted Answer

A)  10% 
B)  90% 
C)  40% 
D)  Almost none 
E)  Almost all 
A)  10% 
B)  90% 
C)  40% 
D)  Almost none 
E)  Almost all

Question 6

W hich of the following is NOT an action of PTH?

Accepted Answer

A)  It increases activation of vitamin D by stimulating the 1 $\alpha$ hydroxylase reaction 
B)  It increases osteocytic osteolysis 
C)  It increases osteoclastic osteolysis 
D)  It increases urinary excretion of phosphate 
E)  It increases intestinal absorption of calcium 
A)  It increases activation of vitamin D by stimulating the 1 $\alpha$ hydroxylase reaction 
B)  It increases osteocytic osteolysis 
C)  It increases osteoclastic osteolysis 
D)  It increases urinary excretion of phosphate 
E)  It increases intestinal absorption of calcium

Exam 67: The Calcitropic Hormones

The bo ne m ine ra l ha s th e e m pir ica l for m ula

Vitamin D is activated by

Calcium and Phosphorus homeostasis are linked because

Vitamin D is a

The fraction of plasma calcium that is bound to protein is about

W hich of the following is NOT an action of PTH?

Physical Foundations Ii: Electrical Force Potential Capacitance and Current

Chemical Foundations I: Chemical Energy and Intermolecular Forces

Chemical Foundations Ii: Concentration and Kinetics

Diffusion

Electrochemical Potential and Free Energy

Cell Structure

Dna and Protein Synthesis

Protein Structure

Biological Membranes

Passive Transport and Facilitated Diffusion

Active Transport: Pumps and Exchangers

Osmosis and Osmotic Pressure

Cell Signaling

ATP Production I: Glycolysis

Atp Production Ii: Tca Cycle and Oxidative Phosphorylation

Atp Production Iii: Fatty Acid Oxidation and Amino Acid Oxidation

Origin of the Membrane Potential

The Action Potential

Propagation of the Action Potential

Skeletal Muscle Mechanics

Contractile Mechanisms in Skeletal Muscle

Neuromuscular Junction and Ec Coupling

Muscle Energetics Fatigue and Training

Smooth Muscle

Organization of the Nervous System

Cells Synapses and Neurotransmitters

Cutaneous Sensory Systems

Spinal Reflexes

Balance and Control of Movement

the Chemical Senses

Hearing

Vision

Autonomic Nervous System

Overview of the Cv System and Blood

Plasma and Red Blood Cells

White Blood Cells and Inflammation

The Heart As a Pump

Cellular Basis of Cardiac Contractility

the Cardiac Function Curve

Vascular Function: Hemodynamics

Microcirculation and Solute Exchange

Regulation of Perfusion

Integration of Cardiac Output and Venous Return

Regulation of Arterial Pressure

Mechanics of Breathing

Lung Volumes and Airway Resistance

Gas Exchange in the Lung

Oxygen and Carbon Dioxide Transport

Acid Base Physiology I Bicarbonate Buffers and Respiratory Compensation

Control of Ventilation

Anatomy and Renal Overview

Glomerular Filtration

Tubular Reabsorption and Secretion

Concentration and Dilution of Urine

Mouth and Esophagus

The Stomach

Intestinal and Colonic Motility

Pancreatic and Biliary Secretion

Digestion and Absorption of the Macronutrients

Energy Balance and Regulation of Food Intake

General Principles of Endocrinology

Hypothalamus and Pituitary Gland

The Thyroid Gland

The Endocrine Pancreas

The Adrenal Cortex

The Adrenal Medulla

Calcium and Phosphorus Homeostasis Ii

Female Reproductive Physiology

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