The mechanism of action of many common medications involves interfering with the normal pathways that cells use to respond to hormone signals.

Which of the following best describes a drug interaction that directly interferes with a signal transduction pathway?

Question

The mechanism of action of many common medications involves interfering with the normal pathways that cells use to respond to hormone signals.

Which of the following best describes a drug interaction that directly interferes with a signal transduction pathway?

BlackTom AI · Accepted Answer

The question describes how many medications work by interfering with hormone signal transduction pathways. To evaluate each option, consider what step in the signaling cascade is being targeted.
Option 1: 'A medication interrupts the transcription of ribosomal RNA genes.' Interrupting rRNA transcription would affect ribosome production and general protein synthesis, but it does not directly address a specific hormone signal transduction pathway. This would have broad, non-specific effects rather than a targeted interference with a signal transduction cascade.
Option 2: 'A medication enters the target cell’s nucleus and acts as a mutagen.' Mutagens in the nucleus pertain to genetic stability and DNA integrity, not to the early or intermediate steps of signal transduction initiated by hormone receptors. This scenario describes genomic damage rather than disruption of a signaling pathway.
Option 3: 'A medication causes the cell to absorb more of a particular mineral, eventually poisoning the cell.' Increasing mineral uptake may cause toxicity, but it does not describe direct interference with a hormone-induced signal transduction pathway. It targets cellular homeostasis broadly rather than the specific messaging mechanisms used by hormone signals.
Option 4: 'A medication enters the target cell and inhibits an enzyme that normally synthesizes a second messenger.' This precisely targets a key feature of many signaling pathways: the production of second messengers (such as cAMP, IP3, DAG) after receptor activation. By inhibiting the enzyme responsible for creating the second messenger, the downstream signaling cascade is directly disrupted, preventing the cell from transmitting the hormone signal.
Taken together, the fourth option best matches the description of a drug interaction that directly interferes with a signal transduction pathway, whereas the others describe effects not tied to the core signaling cascade triggered by hormones.

The mechanism of action of many common medications involves interfering with the normal pathways that cells use to respond to hormone signals. Which of the following best describes a drug interaction that directly interferes with a signal transduction pathway?单项选择题

类似问题

Which ONE of the following thalamic nuclei is targeted by the trigeminothalamic tract?

Which ONE of the following is disinhibited in the direct pathway of the basal ganglia motor loop

30. What is the main purpose of the lecture?

Section FChoose a, b or c as the best answer.29. Which statement is the speaker most likely to agree with?

28. 15-minute neighbourhoods provide residents with inexpensive ____ .

27. ____ % of global car ownership is in the U.S.A.

26. ____ % of American drivers use their cars for all journeys.

Section FQuestions 25 – 28. Complete the following sentences with ONE WORD OR A NUMBER from the lecture. 25. American ____ have built more car spaces than is legally required.

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单