Biol 2110 R. Socci 22. A refle x reaction to loud sounds prevents damage to the
ID: 3482904 • Letter: B
Question
Biol 2110 R. Socci 22. A refle x reaction to loud sounds prevents damage to the inner ear. This reaction is due to contraction of: a. Hair cells. b. Tensor tympani & stapedius muscle. e. The Eustacian (pharyngotympanic) tube. d. The pinna, allowing it to fold over the external ear canal Which symptom would likely result if the dorsal root ganglia were destroyed? a. loss of sensation b. loss of motor function e. loss of memory d. loss of sensory and motor functions 23. 24. When the neurotransmitter binds to its receptor to initiate an action potential, what is activated first? a. Voltage-dependent calcium channels. b. Voltage-dependent sodium channels. c. Receptor-mediated sodium channels. d. Sodium-potassium ATPase (pump) region: The vagus nerve exits the central nervous system in the a cranil b. cervical c. thoracie d. sacral 25. 26. Glands that liberate their secretions by exocytosis through their cell membrane are classified as a. Apocrine. b. Holocrine. c. Endocrine. d. Merocrine 27. The function of ciliated simple columnar epithelium is to: a. Proteet the delicate inner cells from abrasion b. Prevent loss of essential body fluid c. Allow secretion and absorption d. Move fluids or particles along a passageway.Explanation / Answer
Ans 22 b - tensor tympani and stapedius muscle- they contract in the attenuation reflex when the loud sound is sensed.
Ans 23 a - loss of sensory. As this is a ganglion having cell body of sensory neurons.
Ans 24 a - voltage dependent calcium channel
Ans 25 a- in the cranial region it exits from the medulla oblongata and leaves the cranium through jugular foramen
Ans 26- d- merocrine are a type of exocrine gland. No part of secretary cell is lost during the secretion.
Ans 27- d- move particals or fluids along a passageway.
These ciliated cells are found in fallopian tube and in our respiratory tract.
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