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Guy D.
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Biology
TutorMe
Question:

Which organ of the human body is responsible for maintaining the proper water concentration of the blood, interstitial fluid and cells? Name the hormone that is responsible for regulating the osmolarity of the blood as well as determining the volume and concentration of urine.

Guy D.
Answer:

The kidneys play a critical role in controlling water retention/release from the body. ADH (Anti-Diuretic Hormone) plays an important role in lowering osmolarity (reducing sodium concentration in the urine) and by increasing water re absorption by the kidney at the level of the tubules. Preventing water loss via kidney excretion, ADH is important in H20 regulation maintaining homeostasis.

Biology
TutorMe
Question:

What are two specific ways that the shark and remora fish enjoy a symbiotic relationship.

Guy D.
Answer:

Being physically attached to the shark, the remora fish benefits from the protection provided by the shark against other potential remora predators. The remora can also conserve a considerable amount of energy while being transported to other parts of the ocean by the shark.

Anatomy
TutorMe
Question:

Regarding the anatomy of the left human lung, what is the name given to the anatomical surface containing the cardiac impression (making room for the heart) and how many lobes comprise the left lung?

Guy D.
Answer:

Mediastinal surface contains the cardiac impression. The left lung is comprised of two lobes.

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