Match the number on the wave to its function.
1: Number 1 on the wave above represents… ____
2: Number 4 on the wave above represents... ____

Question

BlackTom AI · Accepted Answer

To begin, restating the task: we are matching numbers on the ECG wave to their physiological meaning.
Option set to choose from includes the following phrases: Ventricular polarization / rest phase, Hyperpolarization, Atrial depolarization / contraction, Ventricular depolarization / contraction of the ventricles, Atrial polarization / rest phase.
First, consider Number 1 on the wave. Among the available descriptions, the phrase that best fits the initial upward deflection associated with atrial activity is 'Atrial depolarization / contraction.' This corresponds to the P wave in the ECG, which reflects atrial depolarization leading to atrial contraction. The other choices—'Ventricular polarization / rest phase' and 'Atrial polarization / rest phase'—do not describe the atrial depolarization process, and 'Hyperpolarization' is not a standard descriptor for a prominent deflection in the normal ECG waveform.
Next, assess Number 4 on the wave. The large spike typically labeled as Number 4 corresponds to a rapid, sharp deflection representing ventricular depolarization, which triggers ventricular contraction. The precise clinical term is 'Ventricular depolarization / contraction of the ventricles.' The remaining options—'Ventricular polarization / rest phase' and 'Atrial polarization / rest phase'—refer to rest states or incorrect polarities and do not describe the ventricular depolarization event, while 'Hyperpolarization' is not the event depicted by the main spike.
A quick cross-check: The sequence of ECG events is atrial depolarization (P wave), then ventricular depolarization (QRS complex), followed by ventricular repolarization (T wave). The mapping for Number 1 aligns with atrial depolarization, and the mapping for Number 4 aligns with ventricular depolarization, as described above.
If you were to critique the incorrect options directly: 'Ventricular polarization / rest phase' misuse the term polarization for ventricular activity and mislabel the phase as rest. 'Atrial polarization / rest phase' similarly misuses polarization and frames atrial activity as a resting state, which is inaccurate for the depolarization process. 'Hyperpolarization' is a different electrophysiological phenomenon not depicted by the prominent depolarization spike in a standard ECG.
In summary, the correct pairings are: Number 1 → Atrial depolarization / contraction, and Number 4 → Ventricular depolarization / contraction of the ventricles. The remaining options do not describe the corresponding cardiac events accurately.

BIO 181 (001&002) FALL 2025 4C - Self-Check: Circulatory System: Conduction System (LO 4C.1, 4C.2, 4C.3, 4C.4)

Match the number on the wave to its function. 1: Number 1 on the wave above represents… 2: Number 4 on the wave above represents...

查看解析

登录即可查看完整答案

类似问题

The T wave on an ECG trace is created by the spread of ventricular repolarisation.

Question at position 10 Which letter on the image depicts the S-T segment?BADEFC

Figure 18.2Using Figure 18.2, match the following:Atrial depolarization.

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

更多留学生实用工具

考试浏览器助手

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