Acetylcholine (ACh) is released by motor neurons and binds to receptors on muscle cells to initiate action potentials. Some snake venom contains specific toxins that bind irreversibly to these receptors and block acetylcholine's ability to bind. If an
animal is bitten by a snake with these toxins in its venom, what do you predict would happen?
A) The animal's muscle cells would increase production of myoglobin.
B) The animal's muscles would contract uncontrollably.
C) The animal's muscles would not be able to contract.
D) The animal's muscle cells would show shrinkage in mitochondria.
Answer: C
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If you were to view a sample of animal tissue under a light microscope and notice an extensive extracellular matrix surrounding a tissue, which tissue type would you most suspect?
A) connective B) cardiac muscle C) epithelial D) nervous E) striated muscle
The two types of nucleic acids are ____________________ and ____________________
Fill in the blank(s) with correct word
A karyotype (a display of the chromosomes in a cell) is often used to look for genetic disorders. Karyotype results would not be useful to determine ________.
A. Down syndrome B. sex C. Turner syndrome D. eye color
Redi concluded from his experiment that
A. maggots arise from decaying meat. B. air is a "vital element" necessary for spontaneous generation. C. living things arise from other living things. D. microorganisms are present in the air.