In research, what are two important features of model organisms? Provide an example of a model organism in physiological research
What will be an ideal response?
Answer: Model organisms are important in physiological/biological research because 1) they have features that are suitable for experimental study and 2) understanding a process in a model organism provides better insight into how processes work in other species. The squid is an excellent model organism because its specialized large neurons allowed physiologists to gain an in-depth understanding of how neurons work in animals.
Porcelain crabs are also a good example of model organisms when it comes to studying environmental adaptations. Many species of these crabs live in very different environments, enabling researchers to compare the physiological adaptations of the different species under different environmental conditions.
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F the hematocrit is 40, then the volume occupied by the
a. red blood cells is 60 percent of the total blood volume b. white blood cells is 40 percent of the total blood volume c. red blood cells is 40 percent of the total blood volume d. plasma and other cellular elements is 40 percent of the total blood volume e. red blood cells is 40 percent of the total blood volume, and by the white blood cells is 60 percent of the total blood volume
The three familiar states of matter listed in order from the least to most thermal energy are
A) gas, solid, liquid. B) liquid, gas, solid. C) gas, liquid, solid. D) solid, gas, liquid. E) solid, liquid, gas.
After properly positioning the patient's head for intubation, you should open his or her mouth and insert the blade:
A) into the right side of the mouth and sweep the tongue to the left. B) in the midline of the mouth and gently lift upward on the tongue. C) into the left side of the mouth and move the blade to the midline. D) in the midline of the mouth and gently sweep the tongue to the left.
A person working in the hot sun loses the greatest amount of water from the
A. lungs. B. urine. C. mouth. D. skin. E. GI tract.