Related Experiment Video
Updated: Jun 19, 2026

08:25
Impedance Pneumography for Minimally Invasive Measurement of Heart Rate in Late Stage Invertebrates
Published on: April 4, 2020
TEMPERATURE CHARACTERISTIC FOR HEART BEAT FREQUENCY IN LIMAX.
1Zoological Laboratory, Rutgers University, New Brunswick.
The Journal of General Physiology
|October 30, 2009
Summary
The temperature characteristic for Limax maximus heart rate is 16,300 calories. This finding aligns with previous research on gastropod neurogenic activities.
Area of Science:
- * Zoology
- * Physiology
Background:
- * Understanding the physiological responses of gastropods to environmental factors is crucial.
- * The heart beat frequency in mollusks is influenced by various internal and external stimuli.
Purpose of the Study:
- * To determine the temperature characteristic for the heart beat frequency in quiescent Limax maximus.
- * To compare this characteristic with known values for neurogenic activities in the same species.
Main Methods:
- * Measurement of heart beat frequency in quiescent Limax maximus specimens.
- * Analysis of the relationship between temperature and heart rate.
Main Results:
- * The temperature characteristic (micro) for the heart beat frequency in quiescent Limax maximus was determined to be 16,300 calories.
- * This value shows good agreement with previously reported data for neurogenic activities in the parietal musculature of Limax maximus.
Conclusions:
- * The study quantifies a key physiological parameter related to temperature in Limax maximus.
- * The consistency of the temperature characteristic across different physiological processes suggests a fundamental bioenergetic principle in this gastropod.
Related Concept Videos
Factors Influencing Heart Rate
The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
Dysrhythmias III: Characteristics of Dysrhythmias
Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per minute.
Regulation of Heart Rates
The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
Disturbances in Heart Rhythm
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Pulse
When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical indicator...
The pulse serves as a clinical indicator...
Pulse
The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls between...
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls between...

