Which of the spinal curves forms when a child is about 12 months of age?
A. Sacral
B. Thoracic
C. Lumbar
D. Cervical
E. Coccygeal
Answer: C
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Gans's and Northcutt's "new head" hypothesis proposes that
A) Vertebrates have a diffuse nerve sensory system. B) More complex teeth in the head evolved in response to a more predatory lifestyle. C) The success of vertebrates was linked to specializations of the head. D) B and C
Vesicles that are produced by the ER-Golgi network may be released from the cell using the process of
A) Exocytosis. B) Endocytosis. C) Phagocytosis. D) Both B and C
Which of the following does not occur during the micturition reflex in a baby?
a. the motor neuron supplying the external sphincter is stimulated. b. the parasympathetic nerve supply to the bladder is stimulated. c. the internal urethral sphincter mechanically opens due to changes in the shape of the bladder. d. the external urethral sphincter is relaxed. e. the bladder contracts.
The ability to demonstrate an immune response after exposure to an antigen is called __________.
a. anaphylaxis b. immunosuppression c. immunocompetence d. passive immunity