Infectious proteins that are heat resistant and that cannot be destroyed by ultraviolet light or most chemicals are known as ________
Fill in the blank(s) with correct word
prions
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The ultimate source of energy for humans comes from what source?
A. The sun B. Plants C. Water D. Air E. Animals
The initial influx of sodium ions when an
action potential begins causes which of the following to follow?
a. a chain reaction in which more and more sodium channels open b. a chain reaction in which potassium channels open c. sodium channels rapidly close d. potassium channels rapidly close e. the cytoplasm becomes more negatively charged
Which is the correct order of blood vessels in the systemic circulation, beginning when the blood leaves the heart?
1.Arteriole, artery, capillary, venule, vein 2.Artery, arteriole, capillary, venule, vein 3.Vein, venule, capillary, arteriole, artery 4.Vein, venule, arteriole, capillary, artery
Which of the following endocrine glands does NOT produce its own hormones, but stores hormones produced by the hypothalamus?
A. posterior pituitary B. adrenal cortex C. adrenal medulla D. thyroid E. anterior pituitary