+1-415-670-9189
info@expertsmind.com
Why an increase in constriction of veins
Course:- Biology
Reference No.:- EM13677612




Assignment Help
Expertsmind Rated 4.9 / 5 based on 47215 reviews.
Review Site
Assignment Help >> Biology

1. Why 60 years-old patient HA, who was bedridden for a few days, feels dizzy and experiences significant increase in his heart rate after standing up?

2. What will happen to his systemic arterioles regarding vascular tone changes?

3. Why an increase in constriction of veins and an increase in venous return will help to increase his end-diastolic volume?

4. How did epinephrine release from his adrenal medulla affect his blood supply (perfusion) to his skeletal muscles?

5. If this patient is regularly taking beta-blocker, such as metoprolol, how will this drug affect his sympathetic discharge to the heart, to veins and to arterioles? What changes in his blood pressure can be expected? What advice should be given to this patient?

6. If this patient is regularly taking vasodilator, such as long-acting isosorbidedinitrate (Isordil), how will this drug affect his sympathetic discharge to the heart, to veins and to arterioles? What changes in his blood pressure can be expected? What advice should be given to this patient?

7. If this patient is regularly taking Calcium Channel Blocker (CCB), such as nifedipine, how will this drug affect his sympathetic discharge to the heart, to veins and to arterioles? What changes in his blood pressure can be expected? What advice should be given to this patient?

8. If this patient is regularly taking Angiotensin Converting Enzyme (ACE) inhibitor, such as lisinopril, how will this drug affect his sympathetic discharge to the heart, to veins and to arterioles? What changes in his blood pressure can be expected? What advice should be given to this patient?

9. If this patient is regularly taking Angiotensin Receptor Blocker (ARB), such as losartan, how will this drug affect his sympathetic discharge to the heart, to veins and to arterioles? What changes in his blood pressure can be expected? What advice should be given to this patient?

10. If this patient is regularly taking thiazide diuretic, such as hydrochlorothiazide, how will this drug affect his sympathetic discharge to the heart, to veins and to arterioles? What changes in his blood pressure can be expected? What advice should be given to this patient?

Answered:-

Verified Expert


Preview Container content

ß blocker such as metoprolol are selectively potent against cardiac (ß1) compared to bronchial (ß2) receptors, however this selectivity is lost at higher dose. The sympathetic discharge of the heart is reduced with various protective mechanism such as (i) sub-endocardial coronary flow enhancement, which leads to diastolic prolongation; (ii) restoration of reflex control over heart and circulation; (iii) inhibition of catecholamine cardiotoxic effects and (iv) improved myocardial performance with reduction in heart rate and oxygen demand.

It is noteworthy to mention that the chronic usage of ß blocker – metoprolol is likely to improve the performance of left ventricle and reverses the left ventricle remodeling. The oxygen supply to the myocardial is improved, which also increases the exercise tolerance. These condition leads to improved patient ß blocker such as metoprolol are selectively potent against cardiac (ß1) compared to bronchial (ß2) receptors, however this selectivity is lost at higher dose. The sympathetic discharge of the heart is reduced with various




Put your comment
 
Minimize


Ask Question & Get Answers from Experts
Browse some more (Biology) Materials
Compute the change in energy of an atom that emits a photon of wavelength 2.21 meters. (Planck's constant is 6.626 x 10-34 joule seconds; the speed of light is 2.998 x 108 m/s
How much of the human genome is in the category “other DNA”? What kinds of “other DNA” arethere?n comparison with genes? Do you think that“regulatory sequences” account for m
Cystic fibrosis is a chronic lung and digestive disease caused through a mutation in the CFTR gene on chromosome 7. In the US approximately 39 in 10,000 individuals are affect
Choose one germline mutation as your topic focus. Discuss the normal function of the gene as well as the role of the mutated gene in cancer development and/or progression a
The term "gene" was coined over a 100 years ago by Johansson and our understanding of what a gene is has obviously changed over the years with the advent of molecular biolog
Please answer these questions on a separate sheet(s) of paper, and please type.Small, handwritten figures on an otherwise typed document are acceptable.  It is imperative that
1) Identify the articulation site that allows us to nod our head "yes". choice (A) or (B) (A) Occipital bone - axis (B) Occipital bone - atlas Identify the articulation site
Based on you knowledge of this subject, which presents the biggest problem to reaching a sustainable human ecological footprint, human population growth in less developed coun