The cytoplasm within the muscle fiber contains a molecule to distribute oxygen within the cell. This molecule is known as
A) myoglobin.
B) sarcolemma.
C) hemoglobin.
D) sarcoplasmic reticulum.
Ans: A) myoglobin.
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Which molecules are scientists studying to understand the nature of cell control and genetics?
A) Amino acids B) Nucleic acids C) Phospholipids D) Steroids
Which structure in the figure secretes an alkaline fluid that protects sperm by neutralizing acids in the urethra?
a) C b) H c) B d) G e) F
Which of the following examples below describes an autoimmune disease?
A) Release of bacterial endotoxins that block acetylcholine release result in muscle paralysis. B) Antibody binding to acetylcholine receptors of the motor end plate resulting in muscle weakness. C) Infection and death of T-helper cells by a virus, resulting in a loss of adaptive immunity. D) Uncontrolled cell division resulting in cell surface abnormalities recognized by NK cells.
As you increase the total magnification of the specimen, the working distance ________.
Fill in the blank(s) with the appropriate word(s).