There are three types of unencapsulated tactile receptors. Select the exception.
A. Sebaceous filaments
B. Free nerve endings
C. Tactile discs
D. Root hair plexuses
Answer: A
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Night blindness is a result of a deficiency of what nutrient?
a. glutamate b. vitamin E c. vitamin B6 d. vitamin A e. zinc
Hormones collectively known as enterogastrones include: __________, _____________ and _____________
Fill in the blank(s) with correct word
Which of the following statements regarding cellulose is true?
A. Cellulose is one of the units of a sucrose molecule. B. Cellulose is another name for glucose. C. Cellulose is a source of energy. D. Cellulose can be digested by human digestive enzymes. E. Cellulose provides fiber or "roughage."
The ________ begins to develop about 11 days after conception, and is the sole source of fetal nutrition from the end of week 12 until birth
A) amnion B) blastocyst C) yolk sac D) trophoblast E) placenta