The autonomic division of the nervous system directs
A) processes that maintain homeostasis.
B) behavior.
C) emotions.
D) voluntary activity.
E) conscious control of skeletal muscles.
A) processes that maintain homeostasis.
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One substance has no membrane transporters to move it but can diffuse freely through open leak channels if there is a concentration gradient. Initially, this substance's concentrations in the filtrate and extracellular fluid are equal. Later, however, the active transport of Na+ and other solutes creates a gradient by removing water from the lumen of the tubule where it is located. What substance
is this? A) urea B) glucose and calcium C) glucose D) glucose, calcium, and urea E) calcium
Osmosis is the diffusion of ________ across a selectively permeable membrane.
A. sodium B. sugar C. water D. oxygen E. urea
Identify the following bones as either a facial bone or a cranial bone: vomer, ethmoid, sphenoid, temporal, and inferior nasal conchae
A) The vomer and inferior nasal conchae are facial bones; the ethmoid, sphenoid, and temporal bones are cranial bones. B) The vomer, ethmoid, sphenoid, and inferior nasal conchae are facial bones; the temporal bones are cranial bones. C) The inferior nasal conchae are facial bones; the vomer, ethmoid, sphenoid, and temporal bones are cranial bones. D) The vomer, inferior nasal conchae, and the sphenoid are facial bones; the ethmoid and temporal bones are cranial bones. E) The sphenoid, ethmoid, and temporal bones are facial bones; the vomer and inferior nasal conchae are cranial bones.
The genetically unique carbohydrate coat that enables the cell to identify "self " from "non-self " is the __________.
A. cytoskeleton B. plasma membrane C. glycocalyx D. basement membrane E. serosa