Which of the following statements about action potentials on very long nerve cells is true?
A. are liable to fade if the neuron is not repeatedly stimulated
B. are transmitted the entire length of the nerve undiminished
C. are propagated at various speeds depending on the strength of the original action potential
D. can recur immediately if the cell receives continuous stimulation.
E. utilize nearby glial cells to boost the speed of transmission.
Ans: B. are transmitted the entire length of the nerve undiminished
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Which of the following accurately describe(s) ectotherms compared to endotherms of similar size at similar body temperatures? (Select all correct choices.)
A. Ectotherm metabolic rates are about 25% those of endotherms. B. Ectotherms cannot sustain prolonged activity for as long as endotherms can. C. Ectotherms can survive much longer periods without food than can endotherms. D. Ectotherm metabolic rates decrease as body temperature increases. E. Ectotherms never reach activity levels of endotherms.
The process of mating between genetically unrelated individuals is called inbreeding
Indicate whether the statement is true or false
You examine the chromosomes from a somatic cell nucleus of a human individual. That nucleus contains a Y chromosome and a Barr body. Which of the following is ACCURATE?
A. The individual is a female because there is a Barr body. B. The individual is a male because there is a Y chromosome. C. The individual has Klinefelter Syndrome. D. The individual is a male with Klinefelter Syndrome. E. The individual is a female with Klinefelter Syndrome.
The spleen functions are part of the _____ system. Which of the following completes the sentence above?
A. digestive B. lymphatic C. endocrine D. circulatory