Which of the following contains sodium?
A) H2O
B) NaCl
C) N2
D) CH4
E) H2SO4
B
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When an enzyme's activity is destroyed by heat or a change in pH, the enzyme is said to be
A) conjugated. B) denatured. C) toxic. D) broken. E) tertiary.
Of the four extraembryonic membranes of developing amniotes, the __________ functions as a gas-exchange organ
A) Allantois B) Amnion C) Chorion D) Yolk sac Fill in the blank with the correct answer.
Sympathetic activity inhibits the secretion of ____________________ from the pancreas
Fill in the blank(s) with correct word
Transmitting an impulse from one neuron to another involves a(n)
A) neurotransmitter traveling from postsynaptic axons across a synapse to presynaptic dendrites or a cell body. B) neurotransmitter traveling from presynaptic dendrites across a synapse to postsynaptic axons or a cell body. C) impulse stimulating a presynaptic axon to release a neurotransmitter into a synaptic cleft. D) impulse stimulating presynaptic dendrites to release a neurotransmitter into a synaptic cleft.