The direction from which a sound is coming can be determined by the
A. volume of the sound.
B. frequency of sound waves.
C. amplitude of the sound waves.
D. differences in the time that sound waves take to reach each ear.
E. timbre of sounds.
D
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Akira, a 2.5-ranked tennis player (who thought he was a 4.5 player!), experienced severe pain in his elbow joint after playing for five straight hours, well beyond his limit. He told everyone it was due to a fall while diving to retrieve a difficult shot. What do you think?
What will be an ideal response?
Answer the following statements true (T) or false (F)
1) Irritation of the phrenic nerve may cause diaphragm spasms called hiccups. 2) The obturator nerve branches from the sacral plexus. 3) Reciprocal inhibition means that while one sensory nerve is stimulated, another sensory neuron for synergistic muscles in the same area is inhibited and cannot respond. 4) The mucous membrane that lines the eyelids and is reflected over the anterior surface of the eyeball is the conjunctiva. 5) Researchers have found that retinal ganglionic fields are of two types: on center or off center.
Which of the following is most involved in the defense against cancer?
A. Plasma cells B. Reticular cells C. Natural killer cells D. Dendritic cells E. Aggregated lymphoid nodules
Buffer systems, exhaling carbon dioxide and excretion by the kidneys, are all
a) Ways to balance interstitial fluid b) Means of balancing blood volume c) Ways of controlling H+ levels in the body d) Ways to make ions e) Ways to increase blood volume