A chemical substance that is released into the blood by a gland and that controls or affects processes in other glands or body systems is a(n):
A) enzyme.
B) hormone.
C) leukotriene.
D) neurotransmitter.
Question 2
Which of the following statements made by an EMT shows he correctly understands capillary refill?
A) Capillary refill is a reliable sign of perfusion in adults, but not as reliable in infants and children.
B) Red flushed skin in the adult is a normal finding when assessing capillary refill.
C) A capillary refill of 4 or more seconds in any age patient indicates that he or she is well oxygenated.
D) For a capillary refill test to be normal for a child, it must be assessed at room temperature and be less than 2 seconds.
Bartel and Szostak demonstrated chemical selection for RNA molecules that can catalyze phosphoester
The structure of stomatal guard cells affects their function.
Classification of blood pressure for adults age 18 and older
Chemical similarities between para-aminobenzoic acid and sulfonamides.
Insulin, glucagon, and blood glucose.
Salivary Gland