Under the microscope, you notice a neuron contains neurofibrillary tangles in its cytoplasm. Considering this, which of the following is also likely?
A. The neuron is young.
B. The neuron is from an embryo.
C. The neuron has a decreased metabolism.
D. The neuron must not be from a human.
C. The neuron has a decreased metabolism.
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Although nerve cells in each cerebral hemisphere make connections with other cells in the same hemisphere, there is no crossover of information between the two hemispheres.
Answer the following statement true (T) or false (F)
A(n) ________ in molecular size and a(n) ________ in temperature result in an increased rate of diffusion
A) decrease, increase B) decrease, decrease C) increase, increase D) increase, decrease
The blood-brain barrier results mostly from the action of ________, a type of neuroglia.
A. ependymal cells B. astrocytes C. oligodendrocytes D. microglia
In humans, the effect of the hormone calcitonin is to ________
A) increase blood calcium levels by inhibiting osteoblasts B) increase blood calcium levels by stimulating osteoclasts C) temporarily decrease blood calcium levels when administered in large doses D) decrease mitosis of chondrocytes at the epiphyseal plate