How do drugs like beta-blockers and calcium-channel blockers cause the heart to relax?
A) They block receptors that cause muscle contraction.
B) They block the re-uptake of neurotransmitters that tell the heart to beat faster.
C) They increase the release of neurotransmitters that slow the heart beat.
D) all of the above
E) none of the above
Question 2
The separation of charges within a polar molecule is called a(n) ________.
A) dipole
B) dipole-dipole
C) ionic bond
D) strong attraction
E) polar bond
