An erection results from blood filling the spongy erectile tissues of the penis
Indicate whether the statement is true or false
TRUE
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Regina began an exercise program six months ago, and the muscles of her upper limbs
and lower limbs are more prominent. Exercise can lead to formation of new muscle by A) stimulating connective tissue to differentiate as muscle tissue. B) stimulating motor neurons to divide and innervate more muscle cells. C) stimulating synthesis of myoglobin. D) stimulating skeletal muscle cells to release IL-6, which stimulates satellite cells to divide, producing more muscle cells.
____________________ is released from virally invaded cells and, transiently, nonselectively inhibits multiplication of viruses in other cells
Fill in the blank(s) with correct word
Which of the following activates the cytotoxic T cells?
A) interferon B) interleukin-1 C) interleukin-2 D) interleukin-4
Equal sharing of electrons is a characteristic of a ________ covalent bond, while unequal sharing is in a ________ bond.
A. polar; nonpolar B. nonpolar; polar