Astronauts returning to Earth from an extended stay in space have to be extremely careful not to break a bone. It takes several weeks to restore normal bone strength. Which would be the best regimen to rebuild the lost bone tissue?
A) Stay inactive, avoiding exercise until the lost bone tissue is rebuilt.
B) Start with walking and build up to jogging, with an extra regimen of light weight lifting in the gym.
C) Hit the gym and get going with a few weeks of heavy weight lifting.
D) Several weeks of swimming will rebuild all lost bone mass.
Answer: B
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In which of the following cases would DNA
profiling NOT be used?
a. resolution of paternity disputes b. DNA sequencing of a human genome c. to trace migration routes of humans out of Africa d. resolution of a crime e. diagnosis of infectious diseases
These are the primary cellular sites for the extraction of energy from organic compounds:
1.Golgi bodies 2.ribosomes 3.mitochondria 4.lysosomes 5.endoplasmic reticula
A mutation that replaces one amino acid in a protein with another is called a __________ mutation
a. frameshift b. recombinant c. nonsense d. missense e. neutral
A 39-year-old man presents with severe abdominal cramping accompanied by nausea, vomiting, and bloody diarrhea. During your assessment, the patient tells you that in an attempt to kill himself, he intentionally ingested some castor beans because he heard they were poisonous. The patient's blood pressure is 96/58 mm Hg, heart rate is 112 beats/min, and respirations are 24 breaths/min. Which of the following statements regarding this scenario is correct?
A) You should quickly don a mask and gown because this patient's condition is highly communicable. B) Castor beans commonly cause the symptoms your patient is experiencing but rarely result in death. C) Your patient has ingested the key ingredient for ricin and is at high risk for vascular collapse and death. D) This patient has exposed himself to botulinum toxin and will soon experience diaphragmatic paralysis.