Both insulin and glucagon are peptide hormones that target liver cells. The response of the target cells to each of these two hormones is opposite. This information implies that
A) one hormone binds to a receptor on the cell membrane and the other to an intracellular receptor.
B) the two hormones bind to different cell surface receptors.
C) both hormones interact with receptors at the cell nucleus.
D) each of the two hormones uses a different second messenger.
E) the two hormones bind to different receptors and use a different second messenger.
E) the two hormones bind to different receptors and use a different second messenger.
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Severe ________ immunodeficiency disease is a genetic disorder which results in an infant being born without a functional immune system.
Fill in the blank(s) with the appropriate word(s).
Preganglionic fibers of the autonomic efferent pathway are ________ and secrete ________
A) myelinated; acetylcholine (ACh) and norepinephrine(NE) B) unmyelinated; acetylcholine (ACh) C) myelinated; acetylcholine (ACh) D) myelinated; norepinephrine (NE) E) unmyelinated; norepinephrine(NE)
Endogenous pyrogens released by macrophages causes the hypothalamus to elevate body temperature during times of infection
Indicate whether the statement is true or false
Each thin filament consists of
A) A pair of protein strands wound together. B) Chains of myosin molecules. C) 6 molecules coiled into a helical structure. D) A rod-shaped structure with "heads" projecting from each end. E) A double strand of myosin molecules.