The tubuloglomerular feedback mechanism responds to an increase in
A. systemic blood pressure by signaling for a decrease in heart rate through blood-borne hormones.
B. urine production by signaling for a decrease in urine production through the hormone ADH.
C. NaCl concentration in tubular fluid by signaling for afferent arteriole constriction with local chemical messengers.
D. glomerular capillary hydrostatic pressure by signaling for afferent arterioles to constrict and increase filtration rate.
C
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Axons of the lower motor neurons of the anterior corticospinal tracts innervate
A. muscles of the lower digestive tract. B. skeletal muscles that control skilled movements in the limbs. C. muscles of the respiratory system. D. skeletal muscles of the upper back and neck. E. axial skeletal muscle.
The end of a muscle that is attached to the point that moves when the muscle contracts is called the
A) origin. B) aponeurosis. C) insertion. D) tendon. E) lever.
Which of the following is a correct formula for angular velocity?
A. ? = f/t B. w = f/t C. w = q/t D. ? = q/t
Because of its weight-bearing capacity, the ________ spine is especially susceptible to injury.
A) cervical B) thoracic C) lumbar D) coccygeal