nikita

Understand the voltage-gated channels and how they opperate.

(Talked about the Nervous system. Na+, and K+)

Please explain thank you.

Explain what Hyperpolarization and depolarization are.

(Talked about the Nervous system.)

Please explain, thank you.

1.Tell what summation means (related to neurons) and be able to give examples of it.

2. How does a reflux arc work?

3. What is glia? Name four examples and tell what they do

(Talked about the nervous system)

Please explain, thank you!

How does a reflex arc work?

(talked about the nervous system)

Please explain, thank you.

Explain (be specific) how electrical and chemical synapses transmit the impulse from one cell to another

(Talked about the nervous system)

Please explain, thank you.

Why do myelinated axons transmit impulses faster than unmyelinated ones?

(Talked about the Nervous system)

Please explain, thank you.

How do nerves transmit impulses? Why is it that a myelin sheath increases the rate at which impulses are transmitted along a nerve? Please explain. 100 words or more please

A nerve impulse is

A man is a carrier of sickle-cell anemia. His wife is not a carrier of this disease. What are the chances that they will have a child who is ill with sickle-cell anemia? Provide a Punnett Square to determine exact percentage.

1. Two persons with the sickle cell trait marry and want to have children, but concerned about them having sickle cell anemia. What is the probability of sickle cell anemia in their children? What proportion of their children would you expect to be carriers?

2. If a person with the sickle cell trait marries a person with a normal hemoglobin, what is the probability they will have a child with sickle cell anemia? What proportion of their children would you expect to be carriers?

A person without the allele for sickle cell anemia has children with a person who is a carrier for sickle cell anemia but doesn’t have the disease. What percentage of their children will have sickle cell anemia? What percentage of their children will be carriers for sickle cell anemia? Show your work with a Punnett square. You can copy/paste the blank table below or create a table in the submission box to complete the Punnett square.

1. The transport of molecules of a particular solute from inside an animal cell across the cell membrane to the extracellular fluid always requires energy when _____.

Integral proteins in the plasma membrane

Describe the structure of the plasma membrane. What structures are on the side of the membrane facing the environment, the side of the membrane facing the cell, and the inside of the membrane?

A metabolic pathway is

A) a series of separate chemical reactions that together accomplish a complex chemical transformation.

B) a set of chemical transformational steps, each with a specific enzyme.

C) a means for transforming cellular energy.

D) vulnerable to inhibitors and activators that target some key enzymes.

E) All of the above

According to Le Chatelier's principle, which of the following changes will shift the position of equilibrium to the left for the rection: N2 (g) <===> 2NH3 (g) + heat

double the concentraion of N2

increase the concentration of H2

decrease the concentration of NH3

triple the temperature

The reaction below is exothermic: 2NH3(g) <-> N2(g) + 3H2(g) Le Chaterlier’s principle predicts that adding N2(g) to the system at equilibrium will result in_________.

a) removal of all H2(g)

b) an increase in the value of the equilibrium constant

c) a decrease in the concentration of H2(g)

d) a decrease in the concentration of NH3(g)

e) a lower partial pressure of N2(g)

according to le chateliers principle, what is the effect on the products when N2 is added to the equilibrium mixture of each of the following reactions? a)2NH3(g)<>3H2(g)+N2(g). b)N2(g)+O2(g)<>2NO(g). c)2NO2(g)<>N2(g)+2O2(g). d)4NH3(g)+3O2(g)<>2N2(g)+6H2O(g)

1.  According to Le Chateliers principle what happens if we add more H^+ to the system