Sperm are stored in the ____ after they are produced
a. epididymis
b. seminiferous tubules
c. penis
d. prostate gland
e. vas deferens
ANSWER: a
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The process of emulsification is crucial to the digestion of
A. carbohydrates. B. lipids. C. nucleic acids. D. proteins. E. bile salts.
Which of the following elements is a limiting reagent in forming rubisco?
A) O B) C C) Ca D) N
What is a difference between embryonic and adult stem cells?
A) The use of embryonic stem cells raises fewer ethical issues than the use of adult stem cells. B) Embryonic stem cells are undifferentiated; adult stem cells are partially differentiated. C) It is easier to obtain embryonic stem cells. D) Adult stem cells are easier to grow in culture.
A patient is hospitalized with muscle spasms caused by failure of back muscles to relax after contraction. Which of the following would be most likely to help?
A) Inject calcium into the muscle cell, because it is not being released from the sarcoplasmic reticulum. B) Induce tropomycin and troponin to bind to the myosin binding sites on actin. C) Increase the amount of acetylcholine at the synapses between motor neurons and muscle cells. D) Depolarize the motor neurons to send an action potential to the muscle cells.