Briefly explain the sources of energy for a one-minute sustained muscle contraction.
What will be an ideal response?
1. The first 4-6 seconds of energy come from stored ATP in the muscle cell.
2. 6-15 seconds of energy come from the transfer of creatine phosphate and ADP (which come from the first few seconds of burn) to form additional ATP.
3. 15-60 seconds of energy come from glycolysis, which by now has begun full production of ATP from glucose.
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Produces antibodies that neutralize foreign substances.
A) Lymphatic B) Cardiovascular C) Immune D) Endocrine
The triads of a muscle fiber consist of ________
A) two A bands and one I band B) two thick myofilaments and one thin myofilament C) two thin myofilaments and one thick myofilament D) two T tubules and one terminal cisterna E) two terminal cisternae and one T tubule
An increase in sodium reabsorption increases water reabsorption by actively transporting
water into the blood. Indicate whether the statement is true or false
The stage at which chromosomes aggregate along the equator of a cell is ________.
A. prophase B. interphase C. telophase D. anaphase E. metaphase