What molecule is activated from the binding of an odorant to transmembranous receptor molecules on olfactory hairs?
A. cAMP
B. calmodulin
C. troponin
D. G protein
D
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Though the autonomic innervation by autonomic centers in the brainstem cannot initiate a heartbeat, it can increase or decrease the heart rate
Indicate whether this statement is true or false.
The plasma membrane
a. appears under an electron microscope as a double dark line with a light space between b. is composed primarily of a double layer of protein molecules with cholesterol molecules interspersed between them c. has a hydrophilic region between two hydrophobic regions d. has all of the above characteristics e. does not exhibit any of the above characteristics
Filtration is the ability of a substance to pull water toward an area of higher solute concentration.
Answer the following statement true (T) or false (F)
At each end of the muscle, the collagen fibers of the epimysium, and each perimysium and endomysium, come together to form a
A) tendon. B) satellite cell. C) ligament. D) tenosynovium. E) sheath.