« previous next »

Author Question: What is the difference between a beta blocker and a calcium-channel blocker? A) Beta-blockers ... (Read 177 times)

bobypop

  • Hero Member
  • *****
  • Posts: 539
on: Aug 27, 2018
What is the difference between a beta blocker and a calcium-channel blocker?
 
  A) Beta-blockers block norepinephrine and epinephrine from binding to beta-adrenoceptors and a calcium channel blocker inhibits the flow of calcium ions into muscles.
  B) Calcium channel blockers block norepinephrine and epinephrine from binding to beta-adrenoceptors and do not relax the heart as beta-blockers do.
  C) Although both slow down and relax the heart, only calcium blockers can block norepinephrine and epinephrine from binding to beta-adrenoceptors.
  D) Although both slow down and relax the heart, only beta-blockers can inhibit the flow of calcium ions into muscles, thereby inhibiting muscle contraction.

Question 2

Why is the combination of two protons and two neutrons stable, but the combination of two protons and one neutron is not?
 
  A) There are not enough neutrons to overcome the electrical repulsion of the protons.
  B) There are not enough neutrons to overcome the nuclear repulsion of the protons.
  C) The nuclear attraction between protons is greater than that between neutrons.
  D) The electrical repulsion between the two protons is greater in one case than the other.
  E) none of the above


smrtceo

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Aug 27, 2018
Answer to Question 1

A

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

The difference between mieosis and mitoses The difference between mieosis and mitoses
L-type calcium channel: (a) Calcium channel opens when an action potential passes across the ... L-type calcium channel: (a) Calcium channel opens when an action potential passes across the ...
Angiotensin II Receptor Blockers, Aldosterone Antagonists, and Renin Inhibitors Angiotensin II Receptor Blockers, Aldosterone Antagonists, and Renin Inhibitors
Functions of Vitamin D Vitamin D Helps Bone Health by Regulating Calcium and Phosphorus Functions of Vitamin D Vitamin D Helps Bone Health by Regulating Calcium and Phosphorus
Difference-Between-Carbohydrates-and-Lipids-infographic Difference-Between-Carbohydrates-and-Lipids-infographic
An electron is accelerated from rest through a potential difference. After acceleration the ... An electron is accelerated from rest through a potential difference. After acceleration the ...
Video: Oxygen transport - methods and oxyhemoglobin

For a complete list of videos, visit our video library