In comparison with the nervous system, the regulatory effects of the endocrine system are:
rapid to appear but short-lived.
slow to appear but long-lasting.
rapid to appear and long-lasting.
slow to appear and short-lived.
The Correct Answer is B
A. rapid to appear but short-lived: This describes the nervous system, which uses electrical impulses for near-instant but brief effects.
B. slow to appear but long-lasting: Hormones must travel through the bloodstream to reach targets, which takes time, but their effects can persist for hours or even days.
C. rapid to appear and long-lasting: Very few biological systems act both instantly and for long durations simultaneously.
D. slow to appear and short-lived: This would be an inefficient regulatory system; endocrine effects are typically sustained.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. thalamus: This is a structure in the brain that acts as a relay station for sensory information.
B. thyroid: This is an endocrine gland in the neck that regulates metabolism.
C. thymus: The thymus is considered a primary lymphoid organ because it is the site where T-lymphocytes (T cells) mature and become immunocompetent.
D. spleen: The spleen is a secondary lymphoid organ; it filters blood but is not where lymphocytes are "born" or matured.
Correct Answer is D
Explanation
A. a relative lack of ATP: ATP is required for the cross-bridge cycle; a deficiency prevents muscle contraction and relaxation.
B. high levels of lactate: Anaerobic respiration leads to lactic acid buildup, which lowers pH and interferes with enzyme activity and calcium binding.
C. failure of the sodium-potassium pumps: Ion imbalances caused by pump failure prevent the muscle membrane from repolarizing correctly.
D. all of the above: Muscle fatigue is a complex process caused by the combination of energy depletion, chemical buildup, and ion imbalances.
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