Muscles exhibit the property of excitability. This means that the muscle
A. shortens its length.
B. recoils to its original resting length.
C. stretches beyond its normal length.
D. responds to stimulation by the nervous system.
E. excites itself.
D
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Neural tracts that convey information to the brain concerning temperature and pain would be ________
A) reticulospinal B) lateral spinothalamic C) ventral (anterior) spinothalamic D) posterior spinothalamic
Cells that secrete cytokines, which coordinate specific and nonspecific defenses, are called
A) B cells. B) plasma cells. C) helper T cells. D) mast cells. E) NK cells.
Peripheral chemoreceptors that can detect changes in blood pH are located in the ________.
A. aortic and carotid bodies B. pons C. medulla oblongata D. lungs
Your colleague has discovered a new species and you are viewing one of the cells under the electron microscope. You see a large, oval-shaped structure in the center of the cell, surrounded by a membrane. After this observation, you hypothesize that the cells of this species are prokaryotic cells.
Answer the following statement true (T) or false (F)