Autonomic tone is an important aspect of ANS function because it
A) allows ANS neurons to be silent under normal conditions.
B) allows ANS neurons to increase activity on demand but not decrease their activity.
C) allows ANS neurons to decrease their activity on demand but not increase their activity.
D) allows ANS neurons to increase or decrease their activity, providing a range of control options.
E) provides for a narrow range of control options that keeps target tissues constantly active.
D
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The _____ is the link between the nervous and the endocrine systems.
Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT true of the bones of the lower limb?
A. There are 5 metatarsals in each foot, just like there are 5 metacarpals in each hand. B. The leg contains 2 bones, just like the forearm. C. There are 14 phalanges in each foot, just like in the hand. D. The lower limb contains 8 tarsals, just like the upper limb contains 8 carpals. E. All of these are true of the bones of the lower limb.
How does oxidation during cellular respiration differ from burning?
A. Respiration requires a relatively large amount of energy to start the process. B. Respiration uses enzymes to lower the activation energy. C. Respiration releases more energy as heat and light. D. Respiration doesn't use enzymes to lower the activation energy.
Peptides and catecholamines are hydrophilic and cannot penetrate a target cell. they therefore bind to receptors where?
a) on the DNA b) on the cytoskeleton c) in the nucleus d) on the cell surface