Which of the following is not a property of reflexes?
A) Reflexes do not require a stimulus.
B) Reflexes are quick responses of the nervous system.
C) Reflex responses are very predictable.
D) Reflexes are responses to sensory inputs.
E) Reflexes are not voluntary.
A
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What would happen if the trophoblast did not secrete hCG upon implantation of the blastocyst?:
a. The cells would not continue to divide. b. The corpus luteum would continue to produce progesterone and estrogen. c. Menses would flush the blastocyst out of the uterus. d. The uterine mucosa would not envelop the blastocyst.
A zygote whose genotype is XY will develop as a
A) male. B) female.
The structural subunits of myofibrils in skeletal muscle are the ___.
a) muscle fibers b) myofilaments c) sarcolemmas d) fasciculi
The medial concavity of the kidney is called the ________, which admits the renal nerves, blood vessels, lymphatic vessels, and ureter.
A. cortex B. corpuscle C. capsule D. hilum E. medulla