Discuss the two main factors involved in the generation of a neuron's resting membrane potential
What will be an ideal response?
The main factor is the ease at which potassium ions cross the membrane and cause a net loss of positive ions from the cytosol. The cytosol constantly loses more positive charges than it gains, leading to the negative value of the resting membrane potential. The second factor, the sodium-potassium ion pump (Na+/K+ ATPase), maintains a sodium gradient and a potassium gradient by moving two potassium ions into the cytosol as it moves three sodium ions into the extracellular fluid.
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At what developmental stage does the conceptus reach the uterus?
A. Zygote B. Blastocyst C. Trophoblast D. Morula E. Embryo
Why does one continue to breathe heavy after rigorous physical activity has stopped?
A. The lungs can't stop breathing until the heart rate slows down. B. The kidneys require oxygen to dispose of excess lactate. C. The body requires more oxygen to restore levels of ATP and creatine phosphate. D. The diaphragm is waiting for its acetylcholine to run out. E. Myosin heads need more oxygen to fully detach from actin.
In response to the increased availability of nutrients during the absorptive state, liver and muscle
A. increase gluconeogenesis. B. decrease amino acid uptake. C. increase glycogenesis. D. All of the choices are correct.
which term refers to individuals with two identical alleles for particular trait?
a) heterozygous b) homologous c) homozygous d) haploid