28. Mammals secrete a hormone ATRIAL NATRIURETIC FACTOR (ANF) from A) Atrial cel

Question

28. Mammals secrete a hormone ATRIAL NATRIURETIC FACTOR (ANF) from A) Atrial cells B) Atria and ventricular cells C) Carotid sinus D) Aortic sinus 29. Most birds lack lymph hearts and A) Rely on contractions of nearby skeletal muscles to squeeze the lymph vessels B) Rely on contractions of smooth muscles of the lymph vessels to squeeze the lymph C) Rely on contractions of nearby veins to squeeze the lymph vessels D) all of the above 30. Parasympathetic stimulation leads to A) Increase heart rate, force of contraction and vasoconstriction B) Increase heart rate; reduce force of contraction and vasodilatation C) Decrease heart rate; reduce force of contraction and vasodilatation D) Decrease heart rate and blood pressure

Explanation / Answer

28. Atrial cells

29. A. Rely on nearby skeletal muscle

30. C. Decreases heart rate, reduce force of contraction and vasodilation

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