Blood has been described as an example of a suspension, and soda has been described as a solution. Define these two categories of mixtures and provide different examples of each type
In the examples you provide, explain the molecular properties (approximate size, polarity) of the substances that mix with water.
Common examples of suspensions include muddy water and a mixture of flour with water. Flour is a large carbohydrate, so it is polar and its particle size is greater than 100 nanometers. Saltwater is a common example of a solution. Sodium and chloride are ions (charged particles) that are single atoms smaller than 1 nanometer.
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Which of the following structures does not help to increase the absorptive surface area of the small intestine?
a. villi b. plicae c. lacteal d. microvilli
The partial pressure of oxygen that stimulates the respiratory areas is ________ of normal.
A. 50% B. 67% C. 80% D. 33%
The most important muscles used to pick up a pencil with your toes are the hallucis longus, which acts on the great toe, and the ________.
Fill in the blank(s) with the appropriate word(s).
A presynaptic axon contacts the dendrite of a postsynaptic neuron. How would you describe the synaptic relationship?
A. It is an axosomatic synapse. B. It is an axodendritic synapse. C. It is an electrical synapse. D. It is an excitatory synapse. E. It is an axoaxonic synapse.