This figure shows a lymph node and its components. What structure is indicated by number 4?
A. Lymphatic nodule
B. Medullary cord
C. Trabecula
D. Lymphatic sinusoid
E. Hilum
Answer: B
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Cryptorchidism
A. results in feminization of the male fetus. B. is the lack of testes. C. is the failure of the testes to descend into the scrotal sac. D. has no effect on fertility. E. may be due to excessive amounts of testosterone in the fetus.
Answer the following statements true (T) or false (F)
1. The basal nuclei modify voluntary motor patterns. 2. The hypothalamus initiates voluntary motor activity. 3 The cerebral cortex controls simple cranial reflexes. 4. The pons and superior medulla oblongata control balance reflexes. 5. The hypothalamus controls motor patterns related to eating.
Which is TRUE about typical, resting neurons?
A. The plasma membrane is completely impermeable to potassium ions. B. The concentration of sodium ion is greater inside the cell than outside. C. The permeability of the plasma membrane to potassium ions is much greater than its permeability to sodium ions. D. The plasma membrane is completely impermeable to sodium ions. E. The plasma membrane is most permeable to sodium ions.
The __________ respiratory group consists mostly of inspiratory neurons whose descending fibers terminate on the motor neurons that supply the inspiratory muscles
Fill in the blank(s) with correct word