What type of autonomic fibers release ACh at effectors?
A. Parasympathetic
B. Sensory
C. Sympathetic
D. Somatic
Answer: A
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A myofilament that runs through the core of a thick filament and anchors it to a Z disc is called a(n) ________.
A. elastic filament B. myofibril C. sarcolemma D. T tubule E. thin filament
During a swallow, the ________ has to keep food out of the airways.
A. epiglottis B. esophagus C. cardiac sphincter D. tongue
Botox works by blocking nerve communications and typically is used to target the muscles of the face to reduce wrinkling. However, some patients with excessive sweating (hyperhidrosis) have Botox injected into problem areas to reduce the amount of sweating. Why would this work?
A. Nerves that directly communicate with sweat glands and stimulate them to produce sweat are blocked. B. The Botox toxin directly paralyzes the sweat glands on contact. C. Specialized muscles controlling the sweat glands are blocked from communication. D. The arrector pili muscle is blocked from receiving nerve signal and can't squeeze sweat from the glands.
Match the name of the element with the correct symbol.
a. potassium b. phosphorus c. sodium d. calcium e. carbon f. hydrogen g. chlorine h. nitrogen 1. _____ C 2. _____ Ca 3. _____ Cl 4. _____ H 5. _____ Na 6. _____ P 7. _____ K 8. _____ N