This topic contains a solution. Click here to go to the answer

Author Question: Which of the following is NOT a means by which substances such as oxygen, carbon dioxide, and ... (Read 113 times)

tingc95

  • Hero Member
  • *****
  • Posts: 556
Which of the following is NOT a means by which substances such as oxygen, carbon dioxide, and nutrients exchange across a semipermeable membrane?
 
  a. Diffusion
  b. Osmosis
  c. Facilitated diffusion
  d. Active transport

Question 2

The beneficial effects of epinephrine in cardiac arrest are thought to be due to its:
 
  a. Alpha adrenergic effects
  b. Beta adrenergic effects
  c. Dopaminergic effects
  d. Parasympathetic effects



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jonathanballen97

  • Sr. Member
  • ****
  • Posts: 347
Answer to Question 1

b
Rationale: a. Diffusion is the movement of a solute or gas across a semipermeable membrane from an area of higher concentration to an area of lower concentration
b. Osmosis involves the movement of water, rather than substances.
c. facilitated diffusion is the movement of a solute across a semipermeable membrane with assistance of a helper such as a protein
d. active transport is movement of a particle across a semipermeable membrane utilizing an energy source such as adenosine triphosphate

Answer to Question 2

a
Rationale: a. Correct.
b. While epinephrine has beta adrenergic effects, it is thought that the alpha1 effects of vasoconstriction have more of a role in increasing blood flow through coronary vessels.
c. Epinephrine does not have dopaminergic effects.
d. Epinephrine does not have parasympathetic effects.





 

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

The human body produces and destroys 15 million blood cells every second.

For a complete list of videos, visit our video library