Tortora, Tortora Principles of Anatomy and Physiology, 14e with Allen A&P; Lab M

Question

Tortora, Tortora Principles of Anatomy and Physiology, 14e with Allen A&P; Lab Manual, 5e Help I System Announcements (1 Unread) BIO/291 Week 2 Question 11 Which of the following would occur if the pre-capillary sphincters in the metarterioles were to all undergo vasoconstriction at the same time? O Blood pressure would dramatically increase Heart rate and respiration would increase Blood pressure would dramatically decrease Blood volume would increase O Question Attempts: 0 of 1 u or related compsnies Alinghts reserved Copyright 2

Explanation / Answer

Local blood flow - Blood flow through the capillary bed depends on body’s requirements and is under the control of nerve and hormone signals. For instance, after a large meal the blood flow is diverted to the stomach by vasodilation of blood vessels supplying to the digestive system while there is vasoconstriction of other blood vessels. Another example- in exercise the blood is diverted to the skeletal muscles through vasodilation of blood vessels supplying to skeletal muscles while the blood flow to the digestive system is decreased through vasoconstriction of the blood vessels of the digestive system.

Therefore the answer is A.

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