Which of the following statements about control of body movement is FALSE?
A. The corticospinal motor pathways control most fine, discrete muscle activity.
B. The brainstem pathways control postural and most other coordinated body movements.
C. The cerebellum fine-tunes ongoing movement and helps to coordinate movements.
D. The corticobulbar pathways begin in the sensorimotor cortex and end in the brainstem.
E. The corticospinal tracts from the right sensorimotor cortex control movements of limbs on the right side of the body.
E
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The pancreas lies in the J-shaped loop between the stomach and the small intestine in the __________.
a. pelvic cavity b. cranial cavity c. thoracic cavity d. abdominopelvic cavity
After the egg ruptures from the mature graafian follicle, the follicle becomes the ____
a. oocyte b. corpus luteum c. corpus albicans d. zygote
Starting in the spinal cord, trace the path of a nerve impulse through the sympathetic ANS to its target organ in the abdominal cavity
A) preganglionic neurons (T1-L2 ) — collateral ganglia — ganglionic neurons — visceral effectors in abdominopelvic cavity B) preganglionic neurons (S2-S4 ) — collateral ganglia — ganglionic neurons — visceral effectors in abdominopelvic cavity C) collateral ganglia — preganglionic neurons (T1-L2 ) — ganglionic neurons — visceral effectors in abdominopelvic cavity D) collateral ganglia — preganglionic neurons (S2-S4 ) — ganglionic neurons — visceral effectors in abdominopelvic cavity E) ganglionic neurons — preganglionic neurons ((T1-L2 ) — collateral ganglia — visceral effectors in abdominopelvic cavity
Which of the following statements is correct concerning the variation of voltage-gated ion channels?
A) Na+ channels have much greater diversity than K+ channels. B) Typically, a more complex nervous system also contains a greater diversity of channels. C) There is a great diversity of channels, but within a single organism, only one isoform of a channel can exist. D) There is a large diversity of channels, but they show no physiological significance.