Which of the following muscles of the head draws in the corner of the mouth, as in grimacing?
A) levator labii
B) zygomasticus major
C) nasalis
D) depressor labii
Answer: D) depressor labii
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Peristalsis mixes food in small segments of the alimentary canal with digestive enzymes.
Answer the following statement true (T) or false (F)
Neuromodulators
a. bind to receptors at synapses b. contribute directly to EPSPs c. contribute directly to IPSPs d. may influence neurotransmitter production e. speed up contiguous impulse conduction
Which of these characteristics can be produced by an EPSP?
A) local hyperpolarization B) decreased excitability of neuron C) increased permeability of postsynaptic membrane to K+ and Cl- ions D) local depolarization E) all of these
Which of the following was an adaptation that evolved in connection with human upright walking?
A) Color vision B) Hair C) Stereoscopic vision D) Spinal and pelvic anatomy E) Fully opposable thumbs