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Pathology Medical (MD/DO) School Study Aid


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Vitamins
24 Picmonics to Learn | 55 mins

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Vitamin A (Retinol) Function and Deficiency
Mechanism
Retinol
Constituent of Visual Pigments
Differentiation of Epithelial Cells into Specialized Tissue
Signs and Symptoms
Night Blindness
Dry Skin
Considerations
Used to Treat Measles
Antioxidant
2 mins
Vitamin A (Retinol) Toxicity
Signs and Symptoms
Alopecia
Vision Changes
Headache
Skin Changes
Hyperlipidemia
Hepatotoxicity
Arthralgias
Teratogen
Cleft palate
Cardiac Abnormalities
2 mins
Vitamin B1 (Thiamine)
Mechanism
Branched-chain Ketoacid Dehydrogenase
Pyruvate Dehydrogenase
Alpha-ketoglutarate Dehydrogenase
Transketolase
DEFICIENCY EFFECTS
Wernicke-Korsakoff Syndrome
Beriberi
ATP Depletion
Aerobic Tissues Like Brain and Heart Affected First
Considerations
Deficiency Can Worsen with Glucose Infusion
1 min
Beriberi (Thiamine Deficiency)
Thiamine deficiency
Dry beriberi
Polyneuritis
Muscle wasting
Wet beriberi
Dilated Cardiomyopathy
Edema
50 secs
Wernicke-Korsakoff Syndrome
Thiamine deficiency
Confusion
Ophthalmoplegia
Ataxia
Korsakoff
Confabulation
Personality Changes
Memory loss
Alcoholics
Damage to medial dorsal nucleus
Damage to mammillary bodies
1 min
Riboflavin (Vitamin B2)
Vitamin B2
FAD
FAD Makes 2 ATP
Succinate to Fumarate
Glossitis
Cheilosis
Corneal Vascularization
1 min
Vitamin B3 (Niacin)
Derived from Tryptophan
Synthesis Requires Vitamin B6
Constituent of NAD+
Deficiency Causes
Hartnup Disease
Carcinoid Syndrome
Deficiency Symptoms
Pellagra
Diarrhea
Dermatitis
Dementia
Glossitis
Excess Symptoms
Flushing
1 min
Vitamin B12 (Cobalamin) Mechanism and Deficiency
Mechanism
Cobalamin
Large reserve pool in the liver
Homocysteine to methionine
Methylmalonyl CoA to succinyl CoA
Deficiency Signs and Symptoms
Macrocytic Megaloblastic Anemia
Hypersegmented Neutrophils
Neurologic defects
Posterior column
Lateral corticospinal tract
Spinocerebellar tract
4 mins
Vitamin B5 (Pantothenate)
Mechanism
Pantothenate
Pyruvate Dehydrogenase
Coenzyme A
Fatty Acid Synthase
Deficiency Signs and Symptoms
Enteritis
Dermatitis
Alopecia
Adrenal Insufficiency
1 min
Vitamin B6 (Pyridoxine)
Pyridoxal Phosphate
Transamination
Decarboxylation
Glycogen phosphorylase
Cystathionine Synthase
Heme synthesis
Synthesis of Niacin
49 secs
Vitamin C Mechanism and Deficiency
Mechanism
Ascorbic acid
Antioxidant
Protects Against Free Radicals
Keeps Iron in Reduced State
Hydroxylation of Proline and Lysine
Necessary for Dopamine B Hydroxylase
Deficiency Signs and Symptoms
Scurvy
Swollen gums
Bruising
Poor Wound Healing
Hemarthrosis
Perifollicular Hemorrhages
Anemia
4 mins
Vitamin B6 (Pyridoxine) Deficiency
Deficiency From Isoniazid
Deficiency From Oral Contraceptives
Seizures
Hyperirritability
Peripheral Neuropathy
Sideroblastic Anemia
2 mins
Vitamin B12 (Cobalamin) Deficiency Causes
Causes
Vegans
Pernicious Anemia
Gastric Bypass Surgery
Malabsorption
Sprue
Enteritis
Crohn's Disease
Diphyllobothrium latum
3 mins
Vitamin D Metabolism/Mechanism
Mechanism Of Action
Ergocalciferol (Vitamin D2)
Plant Sources
Cholecalciferol (Vitamin D3)
Sunlight Conversion in Skin
7-Dehydrocholesterol
Liver Hydroxylation
25-(OH) D (25-hydroxyvitamin D)
Storage Form
Kidney Hydroxylation
1,25-(OH)2 D (1,25-dihydroxyvitamin D)
Active Form Calcitriol
Absorbs Calcium and Phosphorus in Intestine
3 mins
Vitamin D Toxicity
Kidney stones
Metastatic calcification of the kidney
Loss of appetite
Abdominal Pain
Sarcoidosis
1 min
Vitamin D Deficiency
Signs & Symptoms
Rickets in children
Bending bones
Rachitic rosary
Breast milk has decreased vitamin D
Osteomalacia in adults
Tetany from Hypocalcemia
1 min
Vitamin E Deficiency
Mechanism
Antioxidant
Protects Erythrocytes
Protects from Free Radical Damage
Deficiency Signs and Symptoms
Hemolytic Anemia
Posterior Column
Spinocerebellar Tract
2 mins
Ergocalciferol (Vitamin D2)
Mechanism
Vitamin D2
Indications
Hypoparathyroidism
Rickets
Hypophosphatemia
Side Effects
Fatigue
Constipation
Hypercalcemia
Kidney Stones
1 min
Vitamin E (Alpha-tocopherol)
Mechanism
Antioxidant
Indications
Fat Malabsorption Syndrome
Alpha-TTP Deficiency
Side Effects
Bleeding
Considerations
Increased Risk Hemorrhagic Stroke
Limit Doses < 200 IU per Day
Nuts and Whole Grains
Vegetable Oils
1 min
Vitamin K
Sources
Dark Green Leafy Vegetables
Synthesized by Intestinal Flora
Mechanism
Activated by Epoxide Reductase
Gamma Carboxylation of Glutamate
Activation of Clotting Factors II, VII, IX, X, Protein C and S
Considerations
Deficiency with Broad Spectrum Antibiotics
Neonatal Hemorrhage with Increase PT and aPTT
Warfarin is a Vitamin K Antagonist
3 mins
Biotin (Vitamin B7)
Mechanism
Carboxylation reaction
Pyruvate carboxylation to oxaloacetate
Propionyl-CoA carboxylation to methylmalonyl-CoA
Acetyl-CoA carboxylation to malonyl CoA
Deficiency Causes
Antibiotic Use
Ingestion of Raw Eggs
Signs & Symptoms
Alopecia
Dermatitis
Enteritis
2 mins
Iron (Ferrous Sulfate)
Mechanism
Ferrous Salts
Indications
Anemia
Side Effects
GI Distress
Nausea and Vomiting
Dark Stools
Considerations
Take with Food
Liquid can Stain Teeth
Keep out of Reach from Children
Caution with GI Disorders
Avoid Antacids
2 mins
Zinc Deficiency
Mechanism
Used in Over 100 Enzymes
Zinc Finger Formation
Signs and Symptoms
Delayed Wound Healing
Hypogonadism
Decreased Adult Hair
Dysgeusia
Anosmia
Perioral Rash
Acrodermatitis Enteropathica
Increased Risk in Patients with Cirrhosis
2 mins
Folate Deficiency
Causes
Macrocytic Anemia
Megaloblastic Anemia
Caused by
Malabsorption
Dietary
Tea and Toast
Alcoholics
Medication-induced
Methotrexate
Trimethoprim
Increased Requirement
Hemolytic Anemia
Pregnancy
1 min

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