The condition known as "flat feet" is due to a lower-than-normal longitudinal arch in the foot. A problem with which of the following would most likely contribute to this condition?
A) a loose calcaneal tendon
B) weak tarsometatarsal joints
C) weakness in the ligaments that attach the calcaneus to the distal ends of the metatarsals
D) weakness in the ligaments that attach the talus to the tibia
E) poor alignment of the phalanges with the metatarsals
C
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The arteries
a. serve as rapid-transit passageways from the tissues to the heart because of their large radii. b. act as a blood reservoir because they have the capacity to store large volumes of blood with little change in their internal pressure. c. are the major resistive vessels of the vasculature. d. are the site of exchange between the blood and surrounding tissues. e. none of these answers.
Which of the following is not under dual control of the ANS?
A. Gastrointestinal motility B. Salivary gland activity C. Adrenal medulla activity D. Pupil diameter E. Heart rate
T tubules
A. store calcium ions. B. provide nutrients to the muscle fiber. C. release acetylcholine. D. generate new muscle fibers. E. conduct action potentials deep into the muscle fiber.
When stereocilia of the hair cells of the maculae bend towards the kinocilium, __________.
Fill in the blank(s) with the appropriate word(s).