The secondary stage of syphilis
A) Is when gummas develop in tissues
B) Is when the patient is no longer infectious to others.
C) Is a time when the pathogen enters and multiplies in the blood.
D) Occurs within 10 days of the primary stage.
E) Has no symptoms
C) Is a time when the pathogen enters and multiplies in the blood.
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During the menstrual cycle, _____ peaks first, _____ peak next, and finally _____ surges
A) estradiol; luteinizing hormone (LH) and progesterone; follicle-stimulating hormone (FSH) B) progesterone; luteinizing hormone (LH) and follicle-stimulating hormone (FSH); estradiol C) estradiol; luteinizing hormone (LH) and follicle-stimulating hormone (FSH); progesterone D) estradiol; luteinizing hormone (LH) and follicle-stimulating hormone (FSH); testosterone E) testosterone; estradiol and follicle-stimulating hormone (FSH); progesterone
Motor neurons release the neurotransmitter acetylcholine (ACh) and acetylcholinesterase degrades ACh in the synapse. If a neurophysiologist applies onchidal (a naturally occurring acetylcholinesterase inhibitor produced by the mollusc Onchidella binneyi)
A) paralysis of muscle tissue B) gradual loss of resting potential C) convulsions due to constant muscle stimulation D) decrease in the frequency of action potentials E) no effect
The DNA in the nucleus of a typical human cell nucleus would be about ____ long if fully stretched
out.
a. 2 m b. 10 mm c. 100 m d. 10 ?m e. 2 km
Both smooth muscle fibers and cardiac muscle fibers:a
have striations. b. are under involuntary control. c. are multinucleate. d. have a comparable resistance to fatigue. e. have a comparable intermediate speed of contraction