Contrast an electrical synapse with a chemical synapse
What will be an ideal response?
In chemical synapses, a neurotransmitter crosses a narrow synaptic cleft. In electrical synapses, the membranes of the presynaptic and postsynaptic cells are joined together by gap junctions.
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Which of the following statements is true about general senses?
A) They are distributed all over the body. B) They are all mechanoreceptors. C) All receptors involved in general sensation consist of free nerve endings. D) They are located in sense organs. E) The reception of the stimulus occurs slowly with these receptors.
The term pollex refers to the ________
A) fingers B) thumb C) great toe D) calf
____________ are anterior pituitary cells that synthesize and secrete FSH and LH
Fill in the blank(s) with correct word
Which of the following strategies do animals use to help protect the retina from damage due to ultraviolet radiation?
a. pigmented cornea b. pigmented lens c. pigmented oil droplets in the photoreceptor inner segments d. all of these. e. none of these.