The plasma membrane of the muscle fiber is known as the
A) cell surface membrane.
B) sarcolemma.
C) sarcoplasm.
D) sarcoplasmic reticulum.
Ans: B) sarcolemma.
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Which of the following occurs in the stratum granulosum?
A. Keratinocytes are produced through the process of mitosis. B. The cells produce more keratin filaments that cause the cells to flatten. C. The keratinocytes flake off the surface of the skin. D. The keratinocytes undergo apoptosis. E. Melanocytes produce melanin.
As part of a bird's gastrointestinal system, the cloaca is defined as the:
A) elongated, spindle-shaped, glandular stomach B) common passage for the fecal, urinary, and reproductive systems C) esophageal enlargement that stores, moistens, and softens food D) structure at the terminal end of the jejunum
A dark net is the best color to use when catching a fish
Indicate whether the statement is true or false
The word "countercurrent" within "countercurrent multiplier" refers to the opposite direction of flow of
A. tubular fluid in the proximal convoluted tubule and collecting tubule. B. salts and water across the wall of the renal tubule. C. tubular fluid within the ascending and descending limb of the nephron loop. D. sodium and potassium across the wall of the nephron.