Which of the following is atrophy?
A. Some muscle is replaced by fibrous tissue.
B. Muscle mass decreases with age.
C. Our diet and lifestyle solely determine the rate and extent of muscle loss.
D. Fat is deposited in muscle tissue and muscle fibers shrink.
Answer: B
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Jane donates a pint of blood to a blood bank. A few minutes later, which of the following would be decreased compared to pre-donation values?
A. Blood flow to her brain B. The percentage of her cardiac output flowing to her kidneys C. Her heart rate and total peripheral resistance D. Her stroke volume and total peripheral resistance E. Her heart rate and mean arterial pressure
Choose the statement that is true of meiosis, considering the entire process and the events of all stages.
A. Sex cells go from being diploid to haploid during meiosis I. B. During anaphase II, the two homologous chromosomes are separated and pulled to opposite ends of the cell. C. Crossover occurs during anaphase I. D. During prophase II, chromosomes re-replicate themselves to form a diploid cell and condense.
The test tubes in the photograph contain Benedict's solution and two unknown substances that have been heated. What do the results indicate?
What will be an ideal response?
A neuron that conducts pain sensations to the central nervous system would be classified as a(n)
A. motor neuron. B. sensory or afferent neuron. C. efferent neuron. D. association neuron. E. interneuron.