Choose the hormone that is NOT correctly matched with the endocrine gland that secretes it.
A. adrenal cortex—aldosterone
B. pancreas—insulin
C. pineal gland—melatonin
D. adrenal medulla—cortisol
E. posterior lobe of pituitary gland—oxytocin
D. adrenal medulla—cortisol
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Chaperonins assist with
a. proteins synthesis. b. assembly of DNA strands. c. polysaccharide synthesis. d. protein folding. e. forming the DNA double helix.
Enzymes that are always present, regardless of the amount of substrate, are ________.
A. regulated enzymes B. endoenzymes C. exoenzymes D. constitutive enzymes E. apoenzymes
Tides are highest and lowest during a spring tide, when the Sun and Moon are aligned with the Earth
Indicate whether the statement is true or false
Ouabain is a chemical used on poison arrows in Africa. It works by inhibiting the sodium-potassium pump. What effect does this chemical have on an action potential?
A) It prevents the stimulation of an action potential by removing sodium from the cell. B) It immediately causes an action potential to be generated. C) There is no direct effect because the pump is used to maintain ion distributions, not to cause an action potential. D) It causes the release of a neurotransmitter that causes an action potential.