Ca2 Guides d'étude, Notes de cours & Résumés

CBSE FINAL EXAM 2023/2024 GRADED A LATEST VERSION A 66-year-old woman comes to the physician because of severe lower back pain. She is otherwise healthy with well-controlled hypertension and hyperlipidemia. She does not drink, but has smoked one pack of cigarettes per day for the past 20 years. An x-ray of the lumbar spine shows an anterior wedge compression fracture of L1. Results of dual-energy X-ray absorptiometry (DEXA) scan shows substantially decreased bone density in the region...

3 Distinct Types of Muscle correct answers 1. Skeletal muscle ~ 40% BW, has striated, tubular multinucleated fibers, usually attached to skeleton, voluntary 2. Smooth muscle- narrow, atpered rod shaped cells, nonstriated, uninucleated fibers, occurs in the walls of internal organs and blood vessles, involuntary 3. Cardiac muscle (smooth + cardiac= 10% BW) - striated, tubular, branches, uninucleated fibers, occurs in the walls of the heart, involuntary Muscle is an excitable contractil...

Power equation= P=fv f=force v=velocity Which of the following is LEAST likely to occur in a muscle fiber that is metabolizing anaerobically? A.Fermentation of glucose to lactic acid B.Phosphorylation of ADP within the electron transport chain C.Depletion of stores of glycogen D.Acidification of the cytoplasm B fast-twitch muscle Muscle fibers that contract rapidly and powerfully, with little endurance. They have few mitochondria and large glycogen reserves. They depen...

Water has an unusually high specific heat. What does this mean? Answer A large amount of heat is required to raise the temperature of water. What is the concentration of hydroxide ions in a solution where pH = 8? Answer 1 × 10-6 M If a polypeptide is said to form an alpha helix or beta sheet, this describes its: Answer Secondary structure How does RNA differ from DNA? Answer Both DNA and RNA contain hydrogen bonds. Polymers are made of monomer subunits that are joined by what type o...

1. What are the 3 characteristics that distinguish living creatures from inanimate objects? correct answer: 1. complex and organized 2. extract and use energy & export end products 3. self replicate and self assemble 2. What is the basic structural, functional, and biological unit of life? correct answer: cell 3. Why do we say that life is information-based? correct answer: biological info Is stored w/in DNA sequence 4. What is a "gene"? correct answer: unit sequence of nucleot...

AV Node Reentry Tachycardia (AVNRT) correct answer: - accounts for ~60% of arrhythmias presenting as SVT or paroxysmal atrial tachycardia (PAT) - affects all age groups and genders equally - no correlation with heart disease - heart rate 150-250 bpm, palpitations, light-headedness, near-syncope, narrow QRS complex rheobase correct answer: lowest point on a strength duration curve at an infinitely long pulse duration; for cardiac pacing, the rheobase is usually reached between 1-2ms ch...

Match from the following list. A. A band B. I band C. Z disk D. H zone E. M line The structures that serve as the attachment site for the thin filaments and mark the boundaries for one sarcomere. - C. Z disk Which ion signals the beginning of skeletal muscle contraction? - Ca2+ ________ is composed of multiple globular molecules polymerized to form long chains or filaments. - Actin Match the structures with the accurate description. A. muscle fiber B. fascicle C. sarcolemma D. myo...

Types of Electrolytes: correct answers-strong: SOLUBLE & IONIC -weak: SOLUBLE & MOLECULAR -non-electrolytes: INSOLUBLE Solubility Rules correct answers1. Group 1A Metals (Li+, Na+, K+, etc.) 2. Ammonium (NH4+) 3. Nitrate (NO3-) 4. Acetate (C2H3O2-) or (CH3COO-) 5. Hydrogren Carbonate (HCO3-) 6. Chlorate (ClO3-) 7. Perchlorate (ClO4-) 8. Halogens (Cl-, Br-, I-) EXCEPT W/ (Ag+, Pb2+, Hg2^2+) 9. Sulfate (SO4^2-) EXCEPT W/ (Ag+, Pb2+, Ca2+, Sr2+, Ba2+) Insolubility Rules correct answ...

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which of the following is the general electron configuration for the outermost electrons of elements in the alkaline earth group? 1) A) ns2np5 B) ns2 C) ns1 D) ns2np6(n -1)d6 E) ns2np4 2) Which of the following is the electron configuration for the bromide ion? 2) A) [Kr]5s24d105p7 B) [Xe] C) [Kr] D) [Ar] E) [Ar]4s23d104p7 3) Valence electrons are electrons located 3) A) in the out...

Homeostasis 1. Which one of the following is an example of a homeostatically controlled variable? (A)Heart rate (B) Body temperature (C) Hypothalamus (D)Thermoreceptors (E) Autonomic nervous system Answer: B. Only choice A and B are variable, and the body doesn’t maintain heart rate homeostatically. Feedback System 2. Which of the following is an example of negative feedback? (A)Increasing blood glucose level in hyperglycemia (B) Decreasing blood glucose level in hypoglycemia (C)...