Answered: Which organs or tissues get a lot of…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Related questions

Question

Which organs or tissues get a lot of blood flow as exercise is happening?

Skeletal muscles

Skin

Digestive system

Brain

Kidneys

Heart

Definition Definition Organ system that helps in the digestion of food by mechanical and biochemical processes. The digestive system breaks down food into simpler components that enable the body to then absorb or transport nutrients. The human digestive system includes the gastrointestinal tract or alimentary canal and the associate glands. The organs of the gastrointestinal tract include the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The associated glands include salivary glands, liver, gallbladder, and pancreas.

Expert Solution

Step 1: Concept behind blood distribution

The distribution of blood flow during exercise is a complex and highly regulated process. It's influenced by various physiological mechanisms to ensure that the body's organs and tissues receive the necessary oxygen and nutrients during physical activity.

Here are the key concepts behind this process:

Blood Flow Distribution During Exercise

Local Vasodilation and Vasoconstriction:
- Active skeletal muscles release chemical signals (e.g., adenosine, CO2, lactic acid) that cause nearby blood vessels to dilate (local vasodilation).
Central Command:
- The brain, particularly the motor cortex, signals the cardiovascular system to increase heart rate and cardiac output when exercise begins.
Competition for Blood Flow:
- During exercise, there is competition for blood flow; muscles and skin receive more blood while systems like the digestive system receive less.
Autonomic Nervous System:
- The sympathetic branch of the autonomic nervous system becomes more active during exercise, increasing heart rate and promoting vasodilation in working muscles.
Cardiovascular Adjustments:
- The heart responds to exercise by increasing its pumping capacity, achieved through an elevated heart rate and stroke volume
Individual Variation:
- The response to exercise varies among individuals based on factors such as fitness level, age, and underlying health conditions.