What role does a first-order neuron play in the passage of a sensory signal to the brain?
A. The first-order neuron carries the sensory signal to the thalamus.
B. The first-order neuron detects the stimulus and transmits a signal to the spinal cord or brain-stem.
C. The first-order neuron carries the signal to the sensory area of the cerebral cortex.
D. The soma of the first-order neuron is in the cerebral cortex and the axon terminates in the spinal cord.
E. The first-order neuron has no role in sensory signal transmission.
B. The first-order neuron detects the stimulus and transmits a signal to the spinal cord or brain-stem.
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If all other conditions remain the same and the concentration of a nonpenetrating solute increases inside a cell, which is most likely to occur?
A. The solute will diffuse across the membrane until its concentration is equal on both sides of the membrane. B. Water will tend to leave the cell because the interior has a decreased osmolarity. C. Water will tend to enter the cell because the interior has a decreased osmolarity. D. Water will tend to leave the cell because the interior has an increased osmolarity. E. Water will tend to enter the cell because the interior has an increased osmolarity.
The corpus callosum interconnects the
a. brain stem and cerebellum. b. brain stem and diencephalon. c. hypothalamus and thalamus. d. two cerebral hemispheres. e. two hemispheres of the cerebellum.
The "animal energy equation" for endotherms states that Einput-Eloss= EBMR+Eproduction+Eactivity+EDIT. In this equation, Eloss refers to
a. thermal energy given off as a consequence of the first law of thermodynamics. b. thermal energy given off as a consequence of the second law of thermodynamics. c. thermal energy given off as a consequence of dietary intake. d. potential energy given off in the form of undigested foodstuffs (feces), sloughed skin, hair or other body products. e. none of these.
A transverse plane can also be called a horizontal plane.
Answer the following statement true (T) or false (F)