How do the first two cervical vertebrae differ from other cervical vertebrae? What are their functions?
What will be an ideal response?
The atlas or C1 vertebra has no body. It articulates with the skull with large curved articular surfaces to allow the skull to rock in a "yes" motion. The axis or C2 vertebra has a projection called the dens that allows the axis to pivot, giving the head the "no" motion. The vertebral foramen of the atlas is enlarged so that when the head is pivoted in the "no" motion, the spinal cord can move.
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Which of the following statements about mice and rats is true?
A) Mice are primarily nocturnal. B) Rats have poor swimming skills. C) Mice have superior detailed vision. D) Rats have 24 teeth.
Which of the following is characteristic of the secondary response?
a. failure of pathogens to survive long enough to result in illness b. begins almost immediately (less than one week) c. massive antibody response d. all of the listed responses are correct
The dendrites share this characteristic with the neuron cell body
A) They contain all of the same organelles. B) They have elaborate membranous channels. C) They receive synapses from many other neurons.
Besides the three basic types of food, good nutrition requires:
a. vitamins b. amino acids c. minerals d. both A and C above