The anatomy and physiology instructor is discussing adrenergic receptors with the nursing class. what adrenergic receptor would the instructor tell the students is found in the heart and can stimulate increased myocardial activity and increase heart rate?

A dive instructor begins his leson on the shore as he guides his student out into the water what zone are they in

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass