EXAMS ( QUESTIONS AND ANSWERS)

Which of the following is a characteristic of urine that indicates adequate hydration? ANSWER pale color The functional unit of the kidney is known as the: ANSWER Nephron Vasa recta are most likely to be found around: ANSWER Loops of Henle Detrussor contraction is stimulated by? ANSWER PARAsympathetic cholinergic fibers Micturition is stimulated by: ANSWER Bladder filling Stool color is due to ANSWER Stercoblin The intrinsic enteric nervous system compon...

Describe the Bias-Variance trade off. ANSWER The bias-variance trade off relates to making your model a good balance of being fitted to the training data and being predictive of the test data. When a model is fitted too well (too complex), then it tends to lack predictive power. When a model predicts too well, it tends to not be fitted too well to the training data. Bias refers to the ability to capture the signal in the data. It is the part of the test error caused by a model that is not...

What is risk? ANSWER a situation is riskier than another when there is greater expected loss and there is a greater variance (less predictability) of outcomes. Greater risk imposes costs (reduces value). Traditional definition of risk ANSWER uncertainty concerning the occurrence of a loss Loss Exposure ANSWER any situation or circumstance in which a loss is possible, regardless of whether a loss occurs Objective Risk ANSWER the relative variation of actual loss from expe...

An agency has ten left-handers and twenty right-handers. Five individuals are chosen for a survey using simple random sampling. Calculate the probability all five have the same handedness. ANSWER 0.11 There are 97 men and 3 women in an organization. A simple random sample of 5 people is taken to form a committee. What is the probability that the committee includes all 3 women? ANSWER 6.2×10−5 A marine scientist has six ocean water samples that are evenly split between the Paci...

O ANSWER Which soil horizon is most influenced by climate? B ANSWER Which of the following levels of organization is/are correctly ordered? A) population, ecosystem, landscape, individual, interaction B) individual, population, interaction, community, ecosystem C) biosphere, landscape, individual, community, interaction D) ecosystem, landscape, region, interaction, population E) None of the choices are correct. C ANSWER Which of the following rivers would ha...

human anatomy - The study of the structures that make up the human body and how those structures relate to each other anantomical Position - The position of the human body that is used as a point of reference in anatomy. lateral - Farther from the medial plane (midline) medial - Nearer to the medial plane (midline) superficial - Nearer to the surface of the body anterior (ventral) - Nearer to the front of the body posterior (dorsal) - Nearer to the back of the body superior ...

Seed germination and development ANSWER 1. Eudicot (garden bean) 2. Monocot (corn) 1. Eudicot (garden bean) ANSWER Radicle ANSWER Hypocotyl ANSWER Foliage leaves ANSWER Cotyledon ANSWER Epicotyl ANSWER 2. Monocot (corn) ANSWER Coleoptile

allow for the display of more shades of gray *each bit can display 2^n shades of grat, 4 bits =2^4= 2 x 2 x 2 x2= 16 shades of gray ANSWER increasing the number of bits assigned to a pixel will: evaluation of gallbladder function ANSWER Ultrasound contrast media is least likely to be used in which of the following exams? IF the reflector and the sound source are moving at the same speed and direction, the doppler shift will: ANSWER Not be detected D. Filtering and compres...

Edelman Understanding Ultrasound Physics questions Is cholesterol level and longevity a. inversely related b. directly related c. unrelated ANSWER a. inversely related. cholesterol increases, lifespan decreases. Is smoking and the likelihood of cardiovascular disease a. inversely related b. directly related c. unrelated ANSWER b. directly related Are years employed and days of vacation earned per year a. inversely related b. directly related c. unrelated ANSWER b. dir...

Obligate Parasites ANSWER Must spend at least some of their life cycle on or in a host Facultative Parasites ANSWER Normally are free-living, but CAN obtain nutrients from a host Permanent parasites ANSWER Remain in or on their host once they've invaded it (ie tapeworm) Temporary parasites ANSWER Feed on, then leave their hosts (ie biting insects) Accidental parasites ANSWER Invade an organism other than their normal host (ie ticks) Hyeprparasitism ANSWER...