Receptors for neurotransmitters on the post-synaptic neuron membrane are often of what type?
A. Ligand-regulated gates
B. Pressure-regulated gates
C. Threshold-regulated gates
D. Voltage-regulated gates
Answer: A
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One of the symptoms of Waardenburg syndrome is poliosis, which is the development of a patch of hair that is completely white or prematurely grey. This coloration results from pheomelanin being produced in the patch.
Answer the following statement true (T) or false (F)
The heart is surrounded by a tough membrane, the ________, which contains the ________.
A. serous pericardium; myocardium B. pericardial cavity; epicardium C. endocardium; fibrous pericardium D. fibrous pericardium; serous pericardium
An animal that excretes most of its nitrogen in the form of urea is called a __________
Fill in the blank with the correct word.
Which of the following is an example of projectile motion?
A. a badminton shuttlecock during flight B. a long jumper while in the air C. both A & B D. none of the above