Compared to type I (slow oxidative) skeletal muscle fibers, how are type IIb (fast-glycolytic) skeletal muscle fibers different?
A. Type IIb fibers have more abundant mitochondria.
B. Type IIb fibers fatigue more readily.
C. Type IIb fibers have more abundant myoglobin.
D. Type IIb fibers are smaller in diameter.
E. Type IIb motor units contain fewer fibers per alpha motor neuron.
B
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Parathyroid hormone stimulates calcitriol synthesis in the kidney and is therefore a tropic hormone.
Answer the following statement true (T) or false (F)
Matching
A) B B) D C) C D) A 35) Type O. 36) Type A. 37) Type AB. 38) Type B. 39) Universal donor. 40) Universal recipient.
Stanley Student is confused on the similarities and differences between proteins and nucleic acids. Assuming he has learned and understood the basic chemistry, what is the likely source of his confusion? To help him sort this out, make a table or flow chart to explain the structure of these molecules and their relationship to each other.
What will be an ideal response?
When the level of ADH (antidiuretic hormone) increases,
A) the rate of sodium ion reabsorption in the DCT decreases. B) more concentrated urine is produced. C) less water is reabsorbed by the nephron and collecting duct. D) the water content of urine increases. E) the sensation of thirst is inhibited.