What cell in the parathyroid gland secretes parathyroid hormone?
a. Chief (principal) cell
b. Oxyphil
c. Basophil
d. Parafollicular cell
Answer: a. Chief (principal) cell
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Where is the pneumotaxic center located?
A. Apneustic center B. Medulla oblongata C. Pons D. Limbic system E. Ventral respiratory group
Cations are smaller in diameter than their electrically neutral atom. Why?
A) When electrons are lost, the remaining electrons are pulled closer toward the nucleus. B) When electrons are lost, the remaining electrons are pulled further away from the nucleus. C) When electrons are gained, the electrons are pulled closer toward the nucleus. D) When electrons are gained, the electrons are pulled further away from the nucleus. E) When electrons are lost, the remaining electrons enter the nucleus.
Most strokes and heart attacks are caused by the abnormal clotting of blood in an unbroken vessel. Moreover, a piece of the ________ (clot) may break loose and begin to travel in the bloodstream as a(n) ________
A) embolism; thrombus B) thrombosis; plaque C) plaque; thrombus D) thrombus; embolus E) plaque; embolus
What is the connective tissue that surrounds the entire muscle?
A. Fascia B. Perimysium C. Endomysium D. Epimysium