Why are skeletal muscles called voluntary?
A) Only these muscles are stimulated to contract by the central nervous system.
B) The individual can make a conscious decision to contract these muscles.
C) These muscles maintain a constant rhythm of contraction.
D) All of the answers are correct.
E) None of the answers are correct.
B) The individual can make a conscious decision to contract these muscles.
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What are the vessels that lead to the glomeruli?
A) Afferent arterioles B) Arcuate arteries C) Efferent arterioles D) Renal arterioles
The segments of the nephron distal to the renal corpuscle are responsible for __________.
secretion of waste materials reabsorption of over 90 percent of water from the tubule reabsorption of useful organic substrates All of the listed responses are correct.
Salivary amylase is an enzyme produced by the salivary glands that breaks down carbohydrates. What will happen to this enzyme as it follows the food into the stomach where the pH drops to 2.5?
A) The enzyme will assume an alternate form and catalyze additional reactions. B) The enzyme will denature and become inactive. C) The enzyme will continue to function as it remains unchanged in chemical reactions. D) The enzyme will denature but retain its function.
In DNA replication,
A. only introns are replicated. B. DNA polymerase splices the short segments of the lagging strand together. C. the leading strand is formed as a continuous strand. D. new nucleotides are added at the 5' end of the growing DNA strand. E. the two existing strands are not used as templates.