Describe the means by which the body regulates water content
What will be an ideal response?
The body regulates water volume primarily through the regulation of salt balance. Decreasing the amount of water in blood causes a decrease in blood pressure, which then initiates the renin-angiotensin-aldosterone system. Aldosterone causes the kidneys to conserve Na+ ions, thus preventing a severe decrease in the blood's osmolarity. Keeping more salt in the blood "attracts" water and this keeps more water in the body and reduces its loss in the urine. In addition, low blood pressure causes the release of vasopressin and this hormone causes the kidneys to conserve water. When the body's water content rises above optimum, less aldosterone and vasopressin are secreted allowing the kidneys to excrete more Na+ and water.
You might also like to view...
The distinguishing feature of a cervical vertebra is the
A) costal facet. B) vertebral arch. C) transverse foramina. D) spinous process. E) pedicle.
Features of the maxillae include
A) alveolar processes. B) inferior orbital foramina. C) orbital surfaces. D) sinuses. E) All of the answers are correct.
Make a map of the following terms: alpha motor neurons, CNS, contractile fibers, extrafusual muscle fibers, Golgi tendon organs, integrating center, joint receptors, muscle spindles, proprioreceptors, sensory neurons, sensory receptors and somatic motor neurons.
What will be an ideal response?
The paranasal sinuses that first appear on computed tomography (CT) coronal images arranged from anterior to posterior are the ____________________.
Fill in the blank(s) with the appropriate word(s).