Blood levels of hormone are kept within very narrow ranges by _________ mechanisms.

A. humoral
B. neural
C. hormonal
D. negative feedback


Answer: D. negative feedback

Anatomy & Physiology

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Cytokines are agents that affect neighboring cells without triggering systemic effects

Indicate whether this statement is true or false.

Anatomy & Physiology

Factor X is related to thrombin in the same way that thrombin is related to

a. prothrombin b. fibrin c. fibrinogen d. plasminogen e. thromboplastin

Anatomy & Physiology

Which of the following terms refers to a lack of oxygen supply to heart muscle cells?

functional syncytium embolism ischemia infarction

Anatomy & Physiology

You are viewing a vessel through the microscope and note the presence of valves. In what direction would blood flowing as it moves through this vessel?

A) Toward the heart B) Away from the heart C) Toward the pulmonary capillaries D) Toward the systemic capillaries

Anatomy & Physiology