Cells communicate with each other by various mechanisms. All of the following are examples of ways
cells communicate EXCEPT ____.
a. gap junctions
b. transfer chain proteins
c. recognition of specific membrane surface molecules
d. cell adhesion molecules
e. chemical messengers
B
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Cells carry out three major types of work; which of the following involves energy for cell motility and the movement of structures within cells?
A. Chemical work B. Mechanical work C. Transport work D. None of the choices are correct.
The woman in the above photograph has been
afflicted by a. low iodine in the diet. b. hypothyroidism. c. vitamin D deficiency. d. testosterone excess. e. progesterone deficiency.
Blood is carried away from the glomerulus by
a. an efferent arteriole. b. peritubular capillaries. c. a renal capsule. d. an afferent arteriole. e. proximal tubules.
When a person has laryngitis, he or she cannot speak. What must happen to permit normal speech?
A) Inflammation in the bronchioles has to go down before enough air can enter the lungs. B) The swelling of the vocal cords must decrease so they can vibrate normally. C) Inflammation in the trachea has to go down before enough air can enter the lungs. D) The epiglottis must cover the glottis.