Psu Bio 141 Exam 2 Zeman Questions And Answers

Calcium in a neural secretion {Ans: entry triggered by depolarization at terminals; basically once an action potential reaches the end of axon terminal this will open up channels to let calcium in; once this calcium enters the neuron it triggers the release of the neurotransmitters into the synaptic cleft}Papillary Muscle {Ans: pull chordae tendineae, stops back movement in shut position}veins {Ans: return blood to the heart; capacitance vessels}cardiac hypertrophy {Ans: enlargement of the heart}How to correct high blood pressure? {Ans: Cardioacceleratory- Fewer action potentials are created. This results in fewer traveling via the sympathetic nervous system and the heart beats slower. Cardioinhbbitory system- More action potentials are created. This results in more action potentials traveling via the parasympathetic nervous system which slows down the heart. Resistance-}What are structural differences between the left and right ventricles? {Ans: Right ventricle wall is thinner; Right develops less pressure than the left ventricle; Right is pounch shaped, left is round}