« previous next »

Author Question: When a substance crosses a cell membrane without the assistance of a transport protein or ... (Read 46 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?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

A simplified pathway for the synthesis of membrane phospholipids at the ER membrane A simplified pathway for the synthesis of membrane phospholipids at the ER membrane
Examples of different cell types in humans Examples of different cell types in humans
Recording the membrane potential of neurons. Recording the membrane potential of neurons.
Chemiosmosis couples the electron transport chain to ATP synthesis. Chemiosmosis couples the electron transport chain to ATP synthesis.
Tympanic membrane. Tympanic membrane.
Cell-Cell junctions/Attachments Cell-Cell junctions/Attachments
Video: Acid-base imbalances - respiratory acidosis and alkalosis

For a complete list of videos, visit our video library