Describe the changes in the rate and/or amplitude of the...

Name: Problem 6, Chapter 25: Experimental and Applied Physiology Laboratory Manual
Uploaded: 2019-09-04T21:00:43-08:00
Duration: 1 min 44 s
Channel: Rikhil Makwana
Description: Describe the changes in the rate and/or amplitude of the pressure pulse tracing associated with immersion of the opposite hand in ice water and warm water. How do you account for the observed changes?

Describe the changes in the rate and/or amplitude of the pressure pulse tracing associated with immersion of the opposite hand in ice water and warm water. How do you account for the observed changes? ________________________________________________________________________ ________________________________________________________________________

Describe the changes in the rate and/or amplitude of the pressure pulse tracing associated with immersion of the opposite hand in ice water and warm water. How do you account for the observed changes?
________________________________________________________________________
________________________________________________________________________

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Key Concepts

Autonomic Nervous System Response

This concept refers to how the autonomic nervous system adjusts heart rate and blood vessel tone in response to external stimuli. In the context of immersing a hand in cold or warm water, the sympathetic arm may be activated (particularly by cold), leading to increased heart rate and vasoconstriction, which in turn affects the rate and amplitude of the pressure pulse tracing.

Sympathetic Activation

When the body is exposed to a stressor such as cold water immersion, sympathetic activation ensues. This response increases heart rate and causes vasoconstriction, elevating blood pressure and increasing the amplitude of the pressure pulse. Conversely, warm water may induce less sympathetic activity, leading to a decrease in these cardiovascular responses.

Baroreceptor Reflex

Baroreceptors are sensors that monitor blood pressure and help regulate cardiovascular function by triggering reflex adjustments. Changes in the pulse tracing can be partly explained by the baroreceptor reflex adjusting heart rate and vascular resistance in response to the sudden shifts in blood pressure induced by temperature changes.

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