In humans, the amputation of a limb results in the loss of neurons in the brain due to the absence of its target cells
However, not all of these neurons are lost - some of them become re-routed, and can establish connections with other neurons. What is this process called?
a. sensitization
b. plasticity
c. long-term potentiation
d. myelination
e. cephalization
ANSWER: b
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In a mammal that you are studying, blood sodium levels are decreasing sharply. To correct this problem, which hormone might you try to administer?
A. cortisol B. aldosterone C. estrogen D. antidiuretic hormone E. testosterone
Researchers found an increase of abnormal meiosis in mouse oocytes when the mouse facility started washing the animals’ plastic cages and water bottles in a new, alkaline detergent. The detergent had damaged the plastic, which began to leach bisphenol A (BPA). Looking at the data in this experiment, which hypothesis do the data best support?
1.glass bottles were affected by the alkaline detergent
2.damaged cages had the greatest abnormal meiosis
3.damaged bottles had the greatest abnormal meiosis (26.9%)
4.the effect of damaged cages and damaged bottles was cumulative
A negative feedback system has four steps. Please choose the answer that lists the steps in the correct order
a. sensory receptors, stimulus, brain, effectors b. stimulus, sensory receptors, brain, effectors c. effectors, brain, sensory receptors, stimulus d. brain, effectors, sensory receptors, stimulus e. stimulus, effectors, sensory effectors, brain
The mycoplasmas have been successively classified as viruses, Gram-negative bacteria, and Gram-positive bacteria largely due to the lack of cell (membranes/walls/RNA) in their structure
What will be an ideal response?