If a sea star egg is taken from the ocean and put into Lake Michigan, would you expect the egg to shrink, swell, or stay the same size?
Stay the same size
None of the above
Swell
Shrink
The Correct Answer is C
Choice A reason: The egg would not stay the same size, as ocean water is hypertonic (higher salinity) compared to Lake Michigan’s fresh water. Osmotic differences drive water movement into the egg, causing swelling, making this an incorrect prediction.
Choice B reason: “None of the above” is incorrect, as the egg will swell due to osmosis. Fresh water in Lake Michigan has lower solute concentration than the egg’s cytoplasm, causing water influx, making this an invalid choice.
Choice C reason: The sea star egg will swell in Lake Michigan’s fresh water, which is hypotonic to the egg’s hypertonic cytoplasm. Water moves into the egg via osmosis, increasing its volume, making this the correct prediction for the egg’s response.
Choice D reason: The egg would shrink in a hypertonic environment, like concentrated saltwater, not fresh water. Lake Michigan’s hypotonic fresh water causes water influx, not loss, making shrinking an incorrect outcome for the egg.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: Necrotic bladder implies tissue death, not a nerve-related obstruction. Neurogenic bladder, caused by nerve supply interruption, leads to functional obstruction, making this incorrect for the described condition.
Choice B reason: Neurogenic bladder results from nerve supply interruption, causing dysfunctional bladder control and obstruction. This matches the description of a functional urinary tract issue, making it the correct term.
Choice C reason: Retrograde bladder is not a medical term; retrograde refers to urine backflow. Neurogenic bladder accurately describes nerve-related obstruction, so this is incorrect for the condition.
Choice D reason: Obstructed bladder is vague and not specific to nerve issues. Neurogenic bladder directly addresses nerve supply disruption causing obstruction, making this incorrect for the term.
Correct Answer is ["B","C"]
Explanation
Choice A reason: Osteosarcoma is a bone cancer, not linked to age, weight, height, or menopausal status. Mrs. Bone’s risk factors (age, race, postmenopausal) align with osteopenia/osteoporosis, not cancer, so this is incorrect for her disorder and risks.
Choice B reason: Osteopenia, low bone density, is likely given Mrs. Bone’s age (68), postmenopausal status, Caucasian race, low weight (128 lb), and height (5’3”). These increase fracture risk, making this a correct choice for her disorder and risk factors.
Choice C reason: Osteoporosis is a risk for Mrs. Bone due to her age, postmenopausal status, Caucasian race, low weight, and height. These factors reduce bone mass, aligning with osteoporosis risk, making this a correct selection for her condition.
Choice D reason: Osteomyelitis, a bone infection, is unrelated to age, weight, or height. Mrs. Bone’s profile matches osteopenia/osteoporosis risk factors, not infection, so this is incorrect for her disorder and associated risks.
Choice E reason: Mrs. Bone has clear risk factors (age, postmenopausal, race, weight, height) for bone density disorders. Stating she has no risk factors ignores her profile, so this is incorrect for her condition and risks.
Choice F reason: Osteomalacia, caused by vitamin D deficiency, is less likely than osteopenia/osteoporosis given her risk factors. Age and postmenopausal status point to bone density issues, so this is incorrect for her primary disorder.
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