Give an exception to the general rule of dual reciprocal innervation by the autonomic nervous system
What will be an ideal response?
Innervated blood vessels receive only sympathetic nerve fibers. Regulation of vessel caliber in innervated blood vessels (that is, promoting vasoconstriction or vasodilation) is accomplished by increasing or decreasing the firing rate above or below tone level, respectively, in these sympathetic fibers. The only blood vessels to receive both sympathetic and parasympathetic fibers are those supplying the penis and clitoris. The precise vascular control this dual innervation affords these organs is important in accomplishing erection.
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What structures extend into the axon and dendrite of a neuron to provide tensile strength?
A. Motor filaments B. Telodendria C. Neurofibrils D. Nissl bodies E. Collateral fibers
There are some 20 known pathogens found in the large intestine; our Ig ________ antibody-mediated response restricts them from going beyond the mucosa and causing problems.
A) D B) A C) M D) E
Drugs are used to control the HIV virus by blocking ______________________________.?
Fill in the blank(s) with correct word
Synovial fluid
A. is a double layer of tissue that endorses a joint B. is a layer of tissue that is continuous with the periosteum C. provides a smooth surface where bones meet D. lines the joint everywhere except over articular cartilage E. is a thin lubricating film covering the surface of a joint