Why are active transport systems important to cells?

Apply the concept of torque to explain how a wheelbarrow allows you to transport a heavy load with a lifting force much less than the weight of the load.

In which direction are hydrogen ions being transported via active transport?

Describe the mechanism behind translocation and where active transport bulk pressure flow and passive transport occur.

Diffusion and active transport are processes that are important to the maintenance of homeostasis in organisms. Compare the two processes, including examples that describe how they are important to living organisms.

Explain the differences between active and passive transport. Why is each important to a cell?

Which molecules would be least likely to diffuse through a plasma membrane without the help of a transport protein?

Chemical messengers that transport nerve impulses from one nerve cell to another are called ________.

A) hormones.

B) glials

C) synapses

D) neurotransmitters

E) interneurons

Proteins use the process of active transport to move substances in or out of the cells by...?

What are the forces that drive active transport?

These are all membranous organelles except:

• A) mitochondria
• B) ribosomes
• C) the nucleus
• D) endoplasmic reticulum
• E) the Golgi complex

In the Krebs cycle, what molecule acquires most of the energy that is released by the oxidation of acetyl CoA, and how many of these molecules are produced during each turn of the cycle?

According to the Michaelis-Menten model, if 1/ Rate is plotted versus 1/[S], the intercept of the plot (when 1/[S] = 0) is 1/Rate $_{\max }$. Using the data below at a given temperature, for a given enzyme and its substrate (S), determine the maximum rate of the reaction, Rate $_{\max }$.

$$\begin{array}{cc} \text { [S], mol/L } & \text { Rate, mmol/min } \\ \hline 2.500 & 0.588 \\ 1.00 & 0.500 \\ 0.714 & 0.417 \\ 0.526 & 0.370 \\ 0.250 & 0.256 \end{array}$$

What is the maximum daily limit of vitamin E?