What is the special role of the thymus gland?
What will be an ideal response?
By secreting hormones, the thymus gland causes T lymphocytes to become immunocompetent.
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Which of the following normally functions as the main pacemaker of the heart?
a. the atrioventricular node b. the sinoatrial node c. the Purkinje fibers d. the node of Ranvier e. the bundle fibers
Which of the following is NOT a function of the spinal cord?
A. It carries sensory nerve action potentials from the sensory receptors to the brain. B. It carries motor nerve action potentials from the brain to the effectors. C. It interprets the sensory nerve action potentials as sensations. D. It serves as a reflex center.
Match each statement with the correct term below.
A. Septum B. Retina C. Mentum D. Malar bone E. Crista galli F. Conchae G. Alveolar ridge
Which of the following is not a function of the autonomic nervous system?
A) innervation of smooth muscle of the digestive tract B) innervation of cardiac muscle C) innervation of glands D) innervation of skeletal muscle