Compare the slope of the forehead of chimpanzees with that of modern humans
What will be an ideal response?
The chimp has
a sloping forehead whereas modern humans have a high forehead.
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When a single presynaptic neuron repeatedly releases neurotransmitter in a very short period of time, it results in ____________ summation in the postsynaptic neuron
Fill in the blank with correct word.
The lower respiratory tract includes all of the following except the:
a. trachea b. bronchi c. larynx d. alveoli
The AV node
a. is the normal pacemaker of the heart. b. is the only electrical connection between the atria and the ventricles. c. rapidly conducts the impulse from the atria to the ventricles so that they contract simultaneously. d. is not innervated by the vagus. e. has the fastest rate of depolarization in the heart.
ATP and adenosine from macula densa cells stimulate vasodilation of the afferent arteriole.
Answer the following statement true (T) or false (F)