The amount of torque which must by generated by the biceps brachii at the elbow in order to maintain the arm in a particular position is 50 Nm. If the biceps attaches to the radius at a perpendicular distance of 3 cm from the joint center at the elbow, how much force must the muscle produce?
A. 1667 N
B. 17 N
C. 150 N
D. 1.5 N
A. 1667 N
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Which of the following is not a function of astrocytes?
a. Hold neurons together in proper spatial relationship. b. Line internal cavities of the brain and spinal cord. c. Induce the formation of the blood-brain barrier. d. Take up excess K+ to help maintain proper brain ECF ion concentration. e. Form neural scar tissue.
What do the receptors for hearing, static equilibrium, and dynamic equilibrium all have in common?
A) The receptors do not adapt to continuous stimulation. B) All of the receptor cells have stereocilia. C) All of the receptors are nociceptors. D) These are all general sense receptors. E) These receptors send action potentials to the same area of the brain for processing.
The efferent arteriole of a nephron divides to form a network of capillaries within the cortex called the ________ capillaries
A) peritubular B) glomerular C) vasa recta D) cortical E) efferent
Where would you measure the shell temperature of a patient?
A) Their thoracic cavity B) Their skin C) Their abdominal cavity D) Their rectum