Isotonic and Isometric Contractions - Physiology and Anatomy - Quiz, Exercises for Physiology. Bharathidasan University

Physiology

Description: This lecture is taken from quiz of Physiology and Anatomy. Key important points are: Isotonic and Isometric Contractions, Muscle Fiber, Muscle Contraction, Cardiac Physiology, Frank-Starling Law of Heart, Metabolic Autoregulation, Baroreceptor Reflex, Vasomotor Center of Medulla
Showing pages  1  -  1  of  1
The preview of this document ends here! Please or to read the full document or to download it.
Document information
Embed this document:
Microsoft Word - Suggested Essays-Exam 3-2007

Suggested Essays for Exam 3

1. Distinguish between isotonic and isometric contractions.

2. Outline the steps that occur from the moment that a muscle fiber is stimulated to the time of relaxation.

3. List four different functions of ATP that occur in muscle contraction.

4. Distinguish between EDV, ESV, and SV.

5. Distinguish between preload and afterload as they apply to cardiac physiology.

6. Be able to explain the Frank-Starling Law of the heart!!

7. Explain how metabolic autoregulation affects blood flow.

8. Explain what effects the baroreceptor reflex would have on

a) the cardiac center of the medulla when blood pressure rises

b) the vasomotor center of the medulla when blood pressure rises

c) the cardiac center of the medulla when blood pressure falls

d) the cardiac center of the medulla when blood pressure falls

9. Explain the concept of isovolumetric contraction. Read the statement on the left. Then determine whether it INCREASES/STIMULATES or DECREASES/INHIBITS the statement on the right. Decreased end-diastolic volume..................Cardiac outpt Increased end-systolic volume..............…...Stroke volume Increased time for ventricular diastole.................….EDV Increased stroke volume...................……....Cardiac output Increased aldosterone secretion…………….Blood volume Hyponatremia………………………………….Aldosterone secretion Increased end-diastolic volume................…Force of contraction Increased norepinephrine secretion............ SA node firing rate Increase in venous return.......................….End-Diastolic Volume ↑ activity of respiratory pump………………..Venous return Decrease in stroke volume........................Cardiac output Increased contractility.............................End systolic volume Increased angiotensin II…………………..Blood pressure Increased ADH secretion…………………..Blood pressure Increased cardiac output..........................Systemic arterial blood pressure Vasodilation ..................................……....Blood pressure Decreased vessel compliance……………..Blood pressure ↑ AV node delay………………………………EDV Hypovolemic shock……………………………Blood pressure ↑ Parasympathetic stimulation of SA node……Heart rate ↑ Stimulation of baroreceptors.......................Heart rate Decreased stroke volume.......................... End systolic volume Decreased ADH secretion.........................Blood volume Decreased tissue pH and oxygen levels………….Blood flow Increased nitric oxide…………………….Vessel diameter Atrial natriuretic peptide…………………..Blood pressure Decreased blood pressure…………………Baroreceptor firing rate ↑ Parasympathetic stimulation…………….Penile vessel diameter

Docsity.com

Docsity is not optimized for the browser you're using. In order to have a better experience please switch to Google Chrome, Firefox, Internet Explorer 9+ or Safari! Download Google Chrome