Cell-mediated immunity would be least effective against ________.
A. virally infected cells
B. extracellular antigens
C. intracellular bacteria
D. intracellular parasites
E. tumor cells
Answer: B
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The somatic nervous system consists of nerve fibers that connect the CNS to the ______,
whereas the autonomic nervous system consists of fibers that connect the ______. A) visceral organs; CNS to the skin and skeletal muscles B) heart and intestines; CNS to the cardiac and smooth muscles C) skin and skeletal muscles; CNS to the visceral organs D) skin and skeletal muscles; brain to the spinal cord
A functional syncytium
a. is a pair of antagonistic muscles causing a joint to move in opposite directions b. is able to contract as a unit because action potentials move between adjacent cells through gap junctions c. is a functional junction between a smooth muscle fiber and an autonomic nerve ending d. is all of the above e. is none of the above
What is the superficial fibrous covering of the heart that is composed partly of dense irregular connective tissue?
A. Visceral layer of the serous pericardium B. Myocardium C. Parietal layer of the serous pericardium D. Endocardium E. Epicardium
Which part(s) of the following statement is/are true?
If the primary motor cortex is destroyed, fine control of movement will be lost, but movement may not be lost completely because the medial and lateral pathways can still provide coarse motor control. A) The first part of the statement is true, and the second part of the statement is false. B) The first part of the statement is false, and the second part of the statement is true. C) Both parts of the statements are true. D) Both parts of the statements are false.