« previous next »

Author Question: When a substance crosses a cell membrane without the assistance of a transport protein or ... (Read 67 times)

anjilletteb

  • Hero Member
  • *****
  • Posts: 569
on: Aug 20, 2018
When a substance crosses a cell membrane without the assistance of a transport protein or expenditure of energy, this process is categorized as a type of passive transport called _______________.
 Fill in the blank(s) with correct word

Question 2

Excessive intake of fluoride causes:
 a. gastrointestinal upset.
  b. general malaise.
  c. pitting and mottling of teeth.
  d. bleeding gums.


ms_sulzle

  • Sr. Member
  • ****
  • Posts: 320
Reply #1 on: Aug 20, 2018
Answer to Question 1

simple diffusion

Answer to Question 2

c


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Cutaneous T cell lymphoma. Cutaneous T cell lymphoma.
Worldwide map of traditional psychoactive substance use. Worldwide map of traditional psychoactive substance use.
Time course and phases of a nerve cell going from resting potential to action potential Time course and phases of a nerve cell going from resting potential to action potential
DSM-5 Criteria for Substance Use Disorder DSM-5 Criteria for Substance Use Disorder
Cell kill and chemotherapy Cell kill and chemotherapy
Results of Mendel’s crosses using pea plants. The numbers represent the F2 plants showing a given ... Results of Mendel’s crosses using pea plants. The numbers represent the F2 plants showing a given ...
Video: Molecules, Membrane Permeability and Structure

For a complete list of videos, visit our video library