Answer:
The correct answer to the question: The pineal body secretes which hormone that maintains the body´s internal clock, the 24-hour wake-sleep cycle, and regulates the onset and duration of sleep?, would be, C: Melatonin.
Explanation:
The process of sleep and wakefulness, also called the circadian cycle, its a pretty complex system that is controlled by several parts of the brain, but most importantly, structures of the diencephalon (vital is the hypothalamus), the pineal gland, and the stem of the brain. All these structures, and some others, respond to changes both in light perception by the eyes and other senses, heat, and homeostatic balances. These factor play a vital role in telling the human body that it is time for sleep, or to awaken. The pineal gland, as part of this melody, is essential, as it secretes the hormone, melatonin, in response to light changes. Melatonin will balance out the process of sleep, when it is secreted in high quantities by the pineal gland, and wakefulness, when it is no longer secreted in response to the presence of light. This is what is called the circadian cycle.
Answer:
<u>A. The Fourth Amendment</u>
Explanation:
The Fourth Amendment to the U.S. Constitution protects people's rights to be secure in their "persons, houses, papers, and effects", meaning that the government can not do searches and seizures to people's properties or belongings unless those searches and seizures are deemed reasonable under the law or legal and follow certain conditions. This Amendment was designed to protect people's privacy and to limit the government power so they can not act at the expense of citizen's rights.
Answer:
The correct answer is A.
Explanation:
B-lympocytes participate in antibody-mediated immunity (also called humoral immunity)- They activate in the lymph nodes and/or in lymphatic organs when they are exposed to an antigen.
Also T-lymphocytes participate in cell-mediated immunity, they release different types of cytokines when they are exposed to an antigen. Macrophages and natural killer cells also participate in this type of immunity.
