Skeletal muscle fibers
a. are some of the longest cells in the body
b. are attached end-to-end within a muscle
c. contain Z lines within their A bands
d. contain only one nucleus
e. exhibit characteristics b and c
A
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Major muscle compartments are separated from each other by __________ septa.
Fill in the blank(s) with the appropriate word(s).
The layer of clear, viscous fluid that is deposited around a primary oocyte is the:
A) corona radiata. B) cumulus mass. C) primary follicle. D) theca. E) zona pellucida.
List the three major functions of the Golgi apparatus
A) The Golgi apparatus (1 ) synthesizes lipids, (2 ) synthesizes carbohydrates, and (3 ) synthesizes proteins. B) The Golgi apparatus (1 ) provides physical isolation for the cell, (2 ) provides structural support, and (3 ) regulates the exchange of materials with the environment. C) The Golgi apparatus (1 ) organizes microtubules in the spindle to move chromosomes during cell division, (2 ) moves material through the cytoplasm, and (3 ) detects environmental stimuli. D) The Golgi apparatus (1 ) renews or modifies the plasma membrane, (2 ) modifies and packages cellular secretions, and (3 ) packages special enzymes within vesicles (lysosomes) for use within the cell. E) The Golgi apparatus (1 ) removes damaged organelles, (2 ) fuses with vesicles containing fluids or solids from the external environment to obtain nutrients, and (3 ) breaks down and releases digestive enzymes to cause destruction to the cell (autolysis).
Which of the following cells undergoes meiosis to produce four sperm?
A) spermatids B) spermatogonium C) primary spermatocyte D) ovum E) zygote