
To determine: Whether exercise increase or decrease venous return of blood and lymph.
Concept introduction: During breathing, the rhythmic pressure changes due to contraction and relaxation of the skeletal muscle of breathing. This cycle is known as the respiratory pump. The vigorous exercise demands more oxygen supply to produce more energy. Therefore, more blood enters the atria.
To determine: Whether the increase in blood return will affect the heart rate.
Concept introduction: During breathing, the rhythmic pressure changes due to contraction and relaxation of the skeletal muscle of breathing. This cycle is known as the respiratory pump. The vigorous exercise demands more oxygen supply to produce more energy. Therefore, more blood enters the atria.

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Chapter 23 Solutions
Loose Leaf For Anatomy & Physiology: An Integrative Approach
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- Choose a catecholamine neurotransmitter and describe/draw the components of the synapse important for its signaling including synthesis, packaging into vesicles, receptors, transporters/degradative enzymes. Describe 2 drugs that can act on this system.arrow_forwardThe following figure is from Caterina et al. The capsaicin receptor: a heat activated ion channel in the pain pathway. Nature, 1997. Black boxes indicate capsaicin, white circles indicate resinferatoxin. a) Which has a higher potency? b) Which is has a higher efficacy? c) What is the approximate Kd of capsaicin in uM? (you can round to the nearest power of 10)arrow_forwardWhat is the rate-limiting-step for serotonin synthesis?arrow_forward
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