What part of the eye controls the amount of light entering through the pupil?
A) iris B) cornea C) sclera D) lens
Answer: A
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________ is known as a "vicious cycle." In most cases, this is harmful if the vicious cycle cannot be broken; sometimes it is necessary for a process to run to completion
A) Homeostasis B) Negative feedback loop C) Positive feedback loop D) Metabolism
Once the action potential reaches the axon terminal, what happens next?
A) release of a neurohormone into the blood B) exocytosis of a neurocrine C) release of the neurotransmitter into the synaptic cleft D) Any of the above could happen next.
Place the following events in synaptic transmission at a cholinergic synapse in order:
A - A postsynaptic potential is produced; B - Voltage gated calcium channels open and calcium enters the cell; C - ACh is released and diffuses across the synaptic cleft; D - A nerve signal arrives at a synaptic knob; E - Ligand gated sodium channels open and sodium enters the cell. A) D, B, C, E, A B) B, D, C, A, E C) D, B, E, A, C D) B, C, D, E, A
The four tissue types are muscle tissue, nervous tissue, connective tissue, and
________. Fill in the blank(s) with correct word