Fluoride treatment strengthens the
A. periodontal membrane.
B. enamel.
C. dentin.
D. pulp.
Answer: B
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The collection of pathways controlling a single joint is known as ________. The simplest reflex in this collection of pathways is the ________, which involves only two neurons: ________ neuron from the ________ and the ________ neuron to the muscle.
Fill in the blank(s) with the appropriate word(s).
The most important factor in decreasing the intracellular concentration of calcium ion after contraction is
A) Active transport of calcium across the sarcolemma. B) Active transport of calcium into the sarcoplasmic reticulum. C) Active transport of calcium into the synaptic cleft. D) Diffusion of calcium out of the cell. E) Diffusion of calcium into the sarcoplasmic reticulum.
The ____________________ controls breathing, heartbeat rates, and reactions to visual and auditory stimuli
Fill in the blank(s) with correct word
What is the correct order of structures through which air flows into the respiratory tract?
A. Larynx; pharynx; bronchi; trachea; bronchioles B. Larynx; pharynx; trachea; bronchioles; bronchi C. Pharynx; larynx; trachea; bronchi; bronchioles D. Pharynx; trachea; larynx; bronchi; bronchioles E. Larynx; pharynx; trachea; bronchi; bronchioles