The Pacemaker of heart under normal circumstances is the a

The \"Pacemaker\" of heart under normal circumstances is the ___. a. Atrioventricular (AV) node b. Purkinje fibers c. Sinoatrial (SA) node d. AV bundle & bundle branches e. Each cardiac muscle cell takes turns being the \"pacemaker\" Which of the following \"types\" of shock could caused by deep general anesthesia? a. Vasogenic shock b. Hypovolemic shock c. Septic shock d. Neurogenic shock e. Cardiogenic shock Which of the following play a role in increasing venous return? 1. RAA system 2. Respiratory pump 3. Increased cardiac output 4. ADH action in kidney tubules 5. Quads muscle contraction 6. Increased SNS outflow a. 1, 2, 3 b. 4, 5, 6 c. 1, 3, 4, 6 d. 2, 5, 6 e. All of the above Please place in the correct chronological order the following events that occur during normal contraction of Smooth Muscle. 1. Ca^2+ enters cell through DHP channels (a little Ca^2+ released from meager SR stores) 2. Myosin Kinase phosphorylates the \"hinge\" region of myosin molecule. 3. Ca^2+ binds and activates calmodulin proteins. 4. Phosphorylated Myosin heads can now move and bind and pull actin thin filaments. 5. Activated Calmodulin then in turn activates Myosin Light Chain Kinase enzymes. 6. Cross-bridge cycling continues until Myosin Phosphatase enzymes remove phosphate from myosin light chains rendering them immobile and ending contraction. a. 1, 3, 6, 5, 4, 2 b. 2, 4, 5, 1, 3, 6 c. 1, 3, 5, 2, 4, 6 d. 1, 6, 2, 3, 4, 5 e. 1, 2, 3, 4, 5, 6 Which of these statements are correct? a. Endocrine effects are prolonged or than are Nervous system effects. b. Nervous system works immediate (faster) than the Endocrine System. c. BOTH the Nervous & Endocrine Systems depend upon receptors to create any and all of their physiological effects. d. All of the above e. Only a & b

Solution

87. The answer is: c. Sinoatrial (SA) Node

SA node is known as the natural pacemaker of the heart.

88. The answer is: d. Neurogenic shock

Deep general anaestheisa can lead to neurogenic shock due to vasomotor paralysis.