Which type of receptor is involved in rapid responses of muscle cells and neurons? (Select all correct choices.)
A. G protein-coupled receptor
B. receptor kinase
C. ligand-gated ion channel
D. nuclear receptor
C
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What is the difference between a methylotroph and methanotroph?
A) Methylotrophs are strict anaerobes, while methanotrophs are strict aerobes. B) Methylotrophs use organic carbon lacking C-C bonds as electron donors and carbon sources, while methanotrophs exclusively use methane as an electron donor and carbon source. C) Methylotrophs produce organic carbon lacking C-C bonds, while methanotrophs exclusively produce methane. D) Methylotrophs are in Proteobacteria, while methanotrophs are in Archaea.
What is a swim bladder?
A) a gas-filled organ to help with buoyancy B) sensory organ C) structure that contains helium qualities D) senses vibrations
Which is the first distinctively hominin trait to appear in the fossil record?
A) sophisticated stone tools B) increased brain size C) upright walking (bipedalism)
Chronic granulomatous disease is a disorder of the (first/second/third) line of immune defense
What will be an ideal response?