Melatonin, a hormone involved in the regulation of circadian rhythms, is secreted by the pineal gland
Indicate whether this statement is true or false.
Answer: True
Rationale: The pineal gland releases a hormone called melatonin, which peaks at nighttime and is reduced during wakefulness. Thanks to this system, light is the primary stimulus regulating our circadian rhythm and it tells us to sleep at night and stay awake for the day
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Which of Marcia's proposed categories of identity conflicts is described as "young adults who never questioned themselves or their goals but instead proceed along the predetermined course of their childhood commitments"?
a. identity diffusion b. identity foreclosure c. identity moratorium d. identity achievement
Critics contend that about ______ of all C-sections are unwarranted
2/3 3/4 1/2 1/3
Which structure is like a locked door that only certain neurotransmitter keys can unlock?
A) synapses B) receptors C) neural chiasms D) response terminals
Regarding gustation, which of the following statements is FALSE?
a. Most taste buds are found around the top edges of the tongue with some located elsewhere in the mouth, including under the tongue. b. As food is chewed, it dissolves and enters the taste buds, where it sets off nerve impulses to the brain. c. The lock-and-key theory explains the taste sensations of saltiness and sourness. d. If you plug your nose, small bits of apple, potato, and onion will "taste" almost exactly alike.