When a __________ reaches its __________ , there is a specific means of receiving it and acting on the message. This task is the responsibility of specialized proteins called __________ .
a. signaling molecule; target cell; G proteins
b. signaling molecule; target cell; receptors
c. signaling molecule; receptor; G proteins
d. kinase; receptor; proteases
Ans: b. signaling molecule; target cell; receptors
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Considering alligators and birds, which of the
following is a derived character?
a. four-chambered heart b. feathers c. four limbs d. a bony skeleton e. egg laying
Innate immune mechanisms _____
a. are fast acting b. take about a week to 10 days to come into full effect c. are very specific for their targets d. are tailored to only a few specific pathogens e. are produced by genetic recombinations
The kidneys produce urine, maintain water balance, and regulation salt balance.
a. true b. false
Select the best response to the question. ?You are reviewing a patient's sputum culture results that have tested positive for Staphylococcus epidermidis. How do you interpret these findings?
A) The patient has a respiratory infection. B) The patient's sputum is no longer sterile. C) This is part of the patient's normal flora. D) The results are inconclusive.