Which of the following generally makes skeletal muscle different from both smooth and cardiac muscle?
A) Skeletal muscles are made of cells called "fibers."
B) Skeletal muscle cannot be contracted voluntarily.
C) Skeletal muscle can be contracted voluntarily.
D) Skeletal muscle cells have nuclei.
C
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Which components of the cytoskeleton allow the cell to resist damage from stretching forces?
a. microfilaments and microtubules b. intermediate filaments and microtubules c. microfilaments and intermediate filaments d. only intermediate filaments
Male gonads are __________, which produce sperm
and the sex hormone __________. Fill in the blank(s) with the appropriate word(s).
What is the relative biological fitness of an individual who is heterozygous for sickle-cell disease who lives in central Illinois vs. an individual who is heterozygous and lives in South Africa?
What will be an ideal response?
You have a concentrated stock solution of 10 M NaOH and want to use it to produce a 150 mL solution of 3 M NaOH. What volume of water and stock solutions will you measure out to make this new solution?
(a) 135 mL of water, 15 mL of NaOH stock (b) 115 mL of water, 35 mL of NaOH stock (c) 100 mL of water, 50 mL of NaOH stock (d) 105 mL of water, 45 mL of NaOH stock