PLease ANSWER ALL QUeSTIONS 11-19 11. Select the correct combination for a sympa

Question

PLease ANSWER ALL QUeSTIONS 11-19

11. Select the correct combination for a sympathetic increase in heart rate:

A. Acetylcholine -- alpha receptors - increased potassium Permeability

B. Norepinephrine and epinephrine -- Beta2 receptors -- increased Permeability t sodium, potassium and calcium

C. Acetlycholine -- muscarinic receptors -- increased premability

D. Norepinephrine and epinephrine -- nicotinic receptors -- increased Permeability to calcium

E. Norepinephrine and epinephrine --- Beta 1 receptors increased permeability to sodium and calcium

12. Which of the following would cause localized arteriolar vasodilation?

A. Ice Pack

B. Increased parasympathetic stimulation to the arteriole

C.increase in CO2

D. increase in O2

E. More than one of the above is correct

13. Receptors that detect changes in blood pressure are located in the:

A. Sinoatrial node

B. Spinal Chord

C. Hypothalamus

D. Medulla

E. Carotid sinus

14. If there is a loss of plasma proteins due to kidney disease (in other words, the plasma proteins go out in the urine), how will bulk flow in the systemic capillaries be affected?

A. Both filteration and reabsoprtion will increase

B. Both filteration and reabsoprtion will decrease

C. Filteration will increase and reabsoprtion will decrease

D. Filteration will decrease and reabsoprtion will increase

15. Which of the following is NOT a function of the lymphatic system?

A. To create pressure changes which affect respiratory rate and depth

B. returning fluid from the interstital spaces to the circulatory system

C. to deilver fats from the small intenstine to circulatory system

D. to help defense againt foreign invaders

E. They are all functions of the lympthatic system

16. Which of the following does NOT increase venous return to the heart?

A. Parasympathetic activity causing venous vasodilation

B. sympathetic nerve activity causing venous vaso constriction

C. respiratory pump providing a pressure gradient bettwen the lower veins and the chest veins

D. Skeletal muscle pump dqueezing blood through the veins

E. More than one answer applies

17. Which of the following is NOT a compensatory change, after hemorrhaging, to restore MAP to normal?

A. Increased synthesis of plasma proteins

B. Increased filatration by capillaires

C. Increased total peripheral resistance

D. Increased venous return

E. Increased stroke volume

18. If the blood had no red blood cells but lungs were functioning normally:

A. The arterial PO2 would be normal

B. The total oxygen content of arteial blood would be normal

C. Both a) and B) are correct

D. None of the above is correct

19. Which muscles are involved in maximal inspiration?

A. The abdominal muscles, interal intercostal and sternocleidomastoid

B. the diaphragm, abdominal muscles, and external intercostal

C. the abdominal muscles and internal intercoastal

D. The diaphragm, abdominal muscles, and internal intercostal

E. The diaphragm, external intercostal and sternocleidomastoid

Explanation / Answer

12) Localised areteriol vasodilation is due to increase in CO2.
13) The receptors that detect changes in the blood pressure are called baroreceptors, they are located in the carotid Sinus. They are found in the aorta and the carotid sinus. Increase in teh blood pressure within the aorta or carotid sinus results in stretch of the walls and stimulate increased baraoreceptors acitvity.

19)The diaphragm, abdominal muscles, and internal intercostal are involved in maximal inspiration

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