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.
Answer: C) Your patient has ingested the key ingredient for ricin and is at high risk for vascular collapse and death.
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A researcher is comparing atmospheric CO2 levels in Earth's northern and southern hemispheres during June-August. As more terrestrial plants are present in the northern hemisphere, what do you expect she will find?
A. Atmospheric CO2 measurements will be greater in the northern hemisphere. B. Atmospheric CO2 measurements will be greater in the southern hemisphere. C. As atmospheric CO2 measurements represent global amounts, measurements in the northern and southern hemispheres will be (approximately) the same.
The site-specific recombination reaction outcome depends on the location and orientation of the target sites. Which of the following is a possible outcome?
A. Recombination between two oppositely oriented sites on the same DNA molecule will result in a deletion. B. Recombination between two oppositely oriented sites on the same DNA molecule will result in an inversion. C. Recombination between two oppositely oriented sites on the same DNA molecule will result in an insertion. D. Recombination between two sites oriented in the same direction on the same DNA molecule will result in an inversion. E. Recombination between two sites oriented in the same direction on different DNA molecules will result in a deletion.
Habitat complexity can support
a. complex life histories. b. increased biodiversity. c. higher productivity. d. more different species in an area. e. All of the above.
Sensory signals that trigger release of saliva are an example of how the nervous system works with which other system?
1.endocrine 2.cardiovascular 3.sensory 4.digestive 5.muscular