The main role of myoglobin in muscle fibers is to ____
a. magnify responses to neurotransmitters
b. sequester ions
c. synthesize ATP
d. store oxygen
e. enhance the strength of the power stroke
ANSWER: d
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In a grasshopper, how does ion composition of pre-urine compare to hemolymph?
A) Pre-urine is significantly higher in osmolarity (especially with respect to Na+ and K+). B) Hemolymph is higher in osmolarity, conserving its Cl-. C) Pre-urine is similar to hemolymph in ion composition. D) The protein pumps and channels of the Malpighian tubules concentrate Cl- in the pre-urine.
_____________________ can be defined as compulsive and repetitive behavior which can lead to impairment. Fill in the blank(s) with the appropriate word(s)
Prokaryotic and eukaryotic ribosomes are structurally and chemically identical
Indicate whether the statement is true or false
Crossing over during prophase I results in ________
A) nondisjunction B) reciprocal translocation C) duplication D) genetic recombination