Autoregulation is defined as:
A) reflex bradycardia that occurs secondary to systemic hypertension.
B) an increase in mean arterial pressure to maintain cerebral blood flow.
C) the forcing of cerebrospinal fluid into the spinal cord as intracranial pressure increases.
D) a decrease in cerebral perfusion pressure that reduces intracranial pressure.
Answer: B) an increase in mean arterial pressure to maintain cerebral blood flow.
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A drug that functions as an agonist
A. blocks a receptor so that the neurotransmitter cannot bind. B. causes great pain if taken in too high a dose. C. activates a receptor, helping a neurotransmitter bind or triggering an action potential in some other way. D. relieves pain.
When dehydration synthesis occurs between two amino acids, a covalent bond called a _________ bond forms between them.
Fill in the blank with correct word.
When compared to extracellular fluid, intracellular fluid contains
A. less potassium but more negatively charged proteins. B. more potassium but fewer negatively charged proteins. C. less potassium and less negatively charged proteins. D. more potassium and more negatively charged proteins.
Which organ system has the principal functions of protection, water retention, thermoregulation, vitamin D synthesis, cutaneous sensation, and nonverbal communication?
A. Skeletal system B. Urinary system C. Integumentary system D. Muscular system