Which of the following processes rely on facilitated diffusion? Select all that apply.
a. Transport of chylomicrons into the lacteals
b. Absorption of galactose and glucose across the apical membrane
c. Transport of single amino acids across the basolateral membrane
d. Transport of di- and tri-peptide across the apical membrane
e. Transport of fructose across the apical membrane
f. Transport of galactose and glucose across the basolateral membrane
Answer: e. Transport of fructose across the apical membrane
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If a post synaptic cell is stimulated to threshold by temporal summation this implies that ________
A) the postsynaptic cell can be influenced by only one presynaptic cell B) the postsynaptic cell is sending frequent action potential C) a presynaptic neuron is sending frequent EPSP D) the presynaptic neuron is sending frequent IPSP
Fibers that connect areas of the cerebral cortex within the same hemisphere are
A) projection fibers. B) commissural fibers. C) association fibers. D) all of the above.
Positive feedback mechanisms
A. usually produce stable conditions. B. move conditions away from the normal state. C. bring conditions back to the normal state. D. cause long-term changes.
Answer the following statement(s) true (T) or false (F)
1. Locomotion is a function of the spinal cord. 2. Ascending signals in the spinal cord travel via gray matter, while descending signals travel via white matter. 3. The cervical and lumbar enlargements are wide points in the spinal cord marking the emergence of motor nerves. 4. Nerve fibers in a given white matter tract are similar in origin, destination, and function. 5. Voluntary motor signals typically begin in an upper motor neuron in the thalamus.