A nerve impulse does not vary in intensity with regard to the strength of the stimulus. What do we call this phenomenon?
A) resting membrane potential
B) refractory period
C) all-or-nothing principle
D) graded response
C
Biology & Microbiology
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The islets of Langerhans located in the _______ secrete both insulin and glucagon.
A. liver B. pituitary C. thalamus D. kidney E. pancreas
Biology & Microbiology
In order to activate the cell mediated immune response, which event must occur?
a. A naïve helper T cell must bind to an antigen-presenting dendritic cell.
Biology & Microbiology
Chromatids
What will be an ideal response?
Biology & Microbiology
Volumetric thirst is triggered by up-regulation of (A)________, followed by up-regulation of vasopressin from the (B)________________________.
a. (A) TSH (B) magnocellular neurosecretory cells b. (A) TSH (B) OVLT c. (A) angiotensin II (B) magnocellular neurosecretory cells d. (A) angiotensin II (B) OVLT
Biology & Microbiology