You should always begin observation of specimens with the oil immersion lens.
a. true
b. false
b. false
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An autorhythmic heart cell is one in which
A. action potentials fire spontaneoulsy. B. action potentials are stimulated by internal stores of acetylcholine. C. action potentials always occur at exactly the same frequency. D. all filaments contract and relax with a high degree of synchrony. E. action potentials are initiated by the autonomic nervous system.
Gray matter on the surface of the brain is called ________.
A. a nucleus B. a ganglion C. a tract D. the cortex
Fluid intake is governed mainly by hypothalamic receptors called osmoreceptors.
Answer the following statement true (T) or false (F)
Which of the following descriptions accurately describes Boyle's law?
A. The partial pressure of a gas in the air you breathe in is equal to the total atmospheric pressure times the fractional concentration of the gas. B. The pressure of gas in your lungs is inversely proportional to the volume in your lungs. C. How well a gas dissolves in a liquid such as blood depends on both its partial pressure and its solubility.