Why does the body spend so much energy to filter so much blood at the kidney and then reabsorb most of it?

What will be an ideal response?


Answer: This system in which the entire body water is filtered 4.5x per day, enables the elimination of water-soluble toxins that might otherwise be very harmful. Also, if the body takes in an unknown toxin, for which is does not have a system for active secretion, such a toxin will be automatically eliminated as it will be filtered but not absorbed.

Anatomy & Physiology

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During muscle activity, ATP plays a role in providing energy for

A) Cross-bridge cycling. B) Establishing ion gradients across the sarcolemmal membrane. C) Transporting Ca2+ back to the sarcoplasmic reticulum. D) All of the above

Anatomy & Physiology

The ________ represents the minimum resting energy expenditures of an awake, alert individual.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

The cells in the nervous system that fill spaces and support neurons both

physically and nutritionally are called ______. Fill in the blank(s) with correct word

Anatomy & Physiology

Which of the following is not a major muscle of the head?

a. Orbicularis oculi. b. Zygomaticus. c. Semimembranosus. d. Masseter.

Anatomy & Physiology