Certain molecules act like bank accounts for H+ ions because they can absorb excess H+ ions to keep a solution from becoming too acidic and release H+ ions to keep the solution from becoming too basic. Such molecules are called:
A) enzymes.
B) buffers.
C) reducing agents.
D) isotopes.
E) oxidizing agents.
B) buffers.
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You are preparing to administer the first of two units of packed RBCs. Evaluate each of the following statements about the safe administration of blood.
Answer T or F. Discuss why the false statements are incorrect. 1. Prime the correct tubing and filter with normal saline. 2. Verify K.L.'s identification with the secretary in the endoscopy suite. 3. Obtain baseline vital signs before starting the transfusion. 4. Begin the transfusion at a rate of 125ml per hour 5. Take K.L.'s vital signs 30 minutes after starting the transfusion. 6. Complete the transfusion within 6 hours of receiving the unit.
The phospholipid molecule represented in the figure
above a. has a hydrophobic head labeled B and a hydrophilic tail labeled A. b. has a hydrophilic head labeled A and a hydrophobic tail labeled B. c. does not contain a phospholipid. d. contains only a hydrophobic segment. e. contains only a hydrophilic segment.
Which of the following is NOT an action of the sympathetic nervous system?
a. to dilate the bronchioles b. to stimulate saliva production c. to increase heart rate d. to increase blood pressure e. to inhibit penile erection
The four geologic eras are directly subdivided into
A) eons. B) periods. C) plates. D) sub-eras. E) epochs.