The only blood vessels whose walls permit exchange between the blood and the surrounding interstitial fluids are the
A) arterioles.
B) arterioles and capillaries.
C) venules and capillaries.
D) capillaries.
E) venules.
C) venules and capillaries.
You might also like to view...
Choose the most correct response. Which type of flow is most efficient?
A) Concurrent B) Countercurrent C) Crosscurrent D) It depends on the rate of flow of both the blood and the respiratory medium.
Lithium has an atomic number of 3. How many electrons are there in the outermost (valence) shell?
A) one B) two C) zero D) three
Which statement regarding gastric motility and emptying is incorrect?
a. increased fluidity allows more rapid emptying. b. presence of acid and fat in the stomach initiates the enterogastric reflex. c. increased gastric volume stimulates motility. d. vagal activity stimulates motility. e. distention of the stomach initiates short reflexes.
Which of the following statements regarding pain pathways is FALSE?
A. Substance P is an important neurotransmitter in specific pain pathways. B. Transmission of information in pain pathways may be inhibited by activation of neurons that synthesize opiate neurotransmitters. C. Synaptic activity in afferent neurons associated with pain receptors can be inhibited by axon-axon synapses with neurons from descending pathways. D. Afferents neurons that detect painful stimuli in the skin can converge onto common ascending pathways with neurons that detect painful stimuli in internal organs. E. Substance P is released by neurons descending from the brain, and it inhibits activation of ascending pain pathways.