Isoelectric point Study guides, Class notes & Summaries

Cardiac Conduction Pathway System SA node> AV node> Bundle of His> Left and Right bundle branches> Purkinjie fibers Pacemakers of the heart Natural: SA Node = 60-100 beats/minute Backup: AV Node = 40-60 beats/minute Backup: Purkinje Fibers (ventricles) = 20-40 beats/minute Brainpower Read More SA Node • Intrinsic Pacemaker of the heart • Rate 60-100 beats/min • RA (Right Atrium), close to SVC (Superior Vena Cava) • Blood supply from RCA (Right Coro...

What are the 6 parts of the cardiac conduction cycle? correct answer: -SA node -Internodal pathways -AV node -Bundle of His -R and L bundle branches -Purkinje fibers What is the SA node? correct answer: -Small cluster of cells located in the upper R atrium *-Pacemaker of the heart* What are internodal pathways? correct answer: Impulses sent by the SA node that travel through the atrial muscle fibers via the intra-atrial pathways Allows for simultaneous depolarization and contra...

Electrocardiogram (ECG) correct answer: Since you can't see the heart beating we use a ECG to provide a picture that replicates the actual cardiac issue. Myocardial Infraction (MI) correct answer: Heart Attack -Have abnormal rhythms. -Death of cardiac muscle due to ischemia Doe the ECG machine monitor or control the hearts rhythm? correct answer: Only monitors Straight line when machine is turned on but not connected to the patient correct answer: Isoelectric = no current ...

P wave - Answer Usually round & upright 0.06 to 0.12 seconds QRS complex - Answer normal duration 0.4 to 0.10 (one small box to 2.5 small boxes) PR interval - Answer normal duration 0.12 to 0.20 ST segment - Answer should be isoelectric the "J point" should come back to baseline 10 times method - Answer count the number of R waves in a 6 second strip and multiply by 10 Big block method - Answer Divide the number of big boxes between 2 consecutive R waves into 300 ...

MCAT - Lab Techniques (MilesDown)Native-PAGE - correct answer A polyacrylamide gel electrophoresis method for proteins using NON-DENATURING conditions. Proteins keep their native charge and structure so they are separated based on charge and size. SDS-PAGE - correct answer A polyacrylamide gel electrophoresis method for proteins using DENATURING conditions. Sodium Dodecyl Sulfate denatures the proteins and gives the proteins a uniform charge. This allows them to be separated solely on mass, t...

ECG Lead System Exam Questions with Correct Answers Electrocardiogram (ECG) - Answer-Since you can't see the heart beating we use a ECG to provide a picture that replicates the actual cardiac issue. Myocardial Infraction (MI) - Answer-Heart Attack -Have abnormal rhythms. -Death of cardiac muscle due to ischemia Doe the ECG machine monitor or control the hearts rhythm? - Answer-Only monitors Straight line when machine is turned on but not connected to the patient - Answer- Isoelect...

MCAT - Lab Techniques (MilesDown) Native-PAGE - correct answer A polyacrylamide gel electrophoresis method for proteins using NON-DENATURING conditions. Proteins keep their native charge and structure so they are separated based on charge and size. SDS-PAGE - correct answer A polyacrylamide gel electrophoresis method for proteins using DENATURING conditions. Sodium Dodecyl Sulfate denatures the proteins and gives the proteins a uniform charge. This allows them to be separated solely on mass,...

Myoglobin was an example protein when the video started talking about folding. Myoglobin is found in large amounts in _____________________. A) muscle B) brain C) fat D) skin - ANSWERSA) muscle Coenzymes such as water-soluble vitamins are needed in only small amounts because A) each vitamin molecule can be reused many times as a cofactor. B) they can be eliminated in the urine. C) only small amounts of substrates are available at any one time. D) only small amounts of enzymes are pres...

How many commonly occurring amino acids are there? correct answers There are 20 commonly occurring amino acids that are used for synthesis of proteins in all living systems What do amino acids contain? correct answers Amino acids contain an alpha-carboxyl group, an alpha-amino group and a distinctive R group substituted on the alpha-carbon What part of amino acids contribute to stereoisomeric forms? correct answers The alpha carbon of all amino acids except glycine is asymmetric and thus a...

BIOCHEM ACS STUDY GUIDE QUESTIONS AND ANSWERS 2024. Each of the following subcellular structures contains DNA EXCEPT A. the nucleus. B. ribosomes. C. chloroplasts. D. mitochondria. - ANSWER- B In plant and animal cells, the three-dimensional integrity of the cell is maintained, in part, by an internal network of filaments called A. the cell wall. B. the Golgi apparatus. C. the cytoskeleton. D. the endoplasmic reticulum. - ANSWER- C Of the following, which are prokaryotes? A. viruses...