Early in development, where do the first blood cell precursors form?
A. The bone marrow
B. The yolk sac
C. The liver
D. The heart
E. The spleen
Answer: B
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Structures that contribute to the maintenance of balance and equilibrium include the ________.
A. vestibular apparatus B. eyes C. proprioceptors from joints and muscles D. All of the choices are correct.
Your tears act as a lubricant and ________ to protect the eyes from microorganisms
A) Moisture B) Glaze C) Bath D) Antiseptic
________ stimulates the thyroid gland to secrete thyroid hormones.
A. A releasing hormone from the anterior lobe of pituitary gland B. A releasing hormone from hypothalamus C. The nerve impulses from a nerve D. A releasing hormone from the posterior lobe of pituitary gland
Elderly individuals generally have a _______ percentage of body fluid and are therefore _______ prone to fluid imbalances
A. high; more B. high; less C. low; less D. low; more