In humans, having dimples in the cheeks is an autosomal dominant trait. If a child has dimples but only one of her parents does, what are the genotypes of her parents? (D = dimples; d = no dimples)
A. One parent Dd; other parent DD
B. One parent dd; other parent DD
C. One parent dd; other parent Dd
D. One parent must be dd; the other parent could be either Dd or DD
E. One parent must be DD; the other parent could be either dd or Dd
Answer: D
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Increasing the flow of Na+ ions into a neuron at rest (-70 mV initially) would trigger
A. active transport. B. hyperpolarization. C. depolarization. D. repolarization. E. None of the choices are correct.
In the process of agglutination, IgD antibodies
A) bind to antigens on two different cells. B) activate the complement system. C) stimulate the release of histamine from mast cells. D) remove the antigen from the pathogen. E) block access to the antigenic site.
Inflammation of the protective coverings of the brain and spinal cord is known as ________
Fill in the blank(s) with correct word