If one nerve stimulus arrives at a muscle fiber so soon that the fiber does NOT relax at all from the previous twitch, the most likely result will be ________. This can only be achieved in the laboratory.
A. complete tetanus
B. incomplete tetanus
C. wave summation
D. spasm
E. fatigue
Answer: A
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This pathway conducts sensory stimuli concerned with proprioceptive information about limb position and discriminative touch, precise pressure, and vibration sensations. It projects through the spinal cord, brainstem, and diencephalon before terminating within the cerebral cortex.
A. The posterolateral pathway B. The musculomedial pathway C. The spinocerebellar pathway D. The posterior funiculus-medial lemniscal pathway E. The anterolateral pathway
A stab wound into the heart can result in cardiac tamponade. This means that
A. the electrical conduction system of the heart is damaged. B. the heart is compressed by blood in the pericardial sac. C. blood enters the pleural cavity. D. the left coronary artery has been damaged or cut. E. the heart has lost all of its blood.
Which of the following statements describes the significance of blood pressure changes as blood reaches the capillary beds?
A. Blood pressure drops as it reaches the capillary beds because high pressure would rupture them. B. Blood pressure increases as it reaches the capillary beds because capillaries need a higher blood pressure for filtration activities. C. Blood pressure does not change as blood flows from arteries into capillaries. D. Blood pressure drops as it reaches the capillary beds because capillaries depend on the lower pressure to prevent fluid exchange between the capillaries and interstitial space.
What is the function of the auditory (Eustachian) tube?
A. Allows us to hear ourselves speak B. Allows fluid to drain out of the inner ear C. Equalizes air pressure in the middle ear D. Allows passage of the auditory nerve