Question 4

Biology

1 answer:

Colt1911 [192]3 years ago

8 0

Question 4

Which of the following would be considered a form of active transport?

o the movement of oxygen molecules from high concentration in the blood to low concentration in the cell.

O the movement of carbon dioxide from high concentrations in the cell to low concentrations in the blood.

o the movement of glucose into the cell down its concentration gradient,

o the movement of sodium atoms from low concentration in the cell to higher concentrations outside the cell.

You might be interested in

if you were to watch an individual neurotransmitter molecule just after it was released what would happen to it

Olenka [21]

Neurotransmitter leaves the presynaptic cell by exocytosis. It is released in the synaptic space, and moves to the postsynaptic membrane to meet its receptor. When binding occurs, it triggers a response in the new cell.

-----------------------------------------

Every neuron forms connections with another cell.

When a presynaptic cell sends information, a neurotransmitter is released.

After the exocytosis event, this chemical substance travels through the synaptic space forward to the other cell. Once there, it binds to its receptors in the postsynaptic membrane.

When the joining occurs, the receptor acquires a channel shape. This change allows the ion transference that will make possible the modification of the action potential.

This binding produces the excitatory postsynaptic potential -depolarization-.

A new action potential initiates in the postsynaptic cell and spreads to the rest of the membrane, depolarizing it.

If the communication between cells needs to stop, the neurotransmitter will be taken out from the synaptic space <em>instead of binding to its receptor. </em>

There are two mechanisms by which the neurotransmitter can be eliminated: by deactivation or reuptake.

-------------------------------------------------------

6 0

2 years ago

How are temperature and salinity related in a thermohaline circulation pattern?

katovenus [111]

Answer:

The correct answer is option D.

Explanation:

Thermohaline circulation is the circulation of currents in the deep ocean due to the density of the water which is controlled by heat and salinity. Water in the ocean posses layers or defined boundaries based on the density which provides driving force to the deep ocean currents.

Formation of these layers is due to the sinking of the cold water in the basin which and ice formation which leaves the salt in the seawater ,therefore, increasing salinity. This increased salinity increases its density and the surface water is replaced by the sinking water causing deep ocean currents.

Thus, option D is the correct answer.

5 0

3 years ago

B and T cells of the immune system have unique B and T cell surface receptors (respectively) as shown above. What is the functio

GalinKa [24]

Answer:C. There will be an increase in variety of the shape of the B and T cell receptors allowing them to recognize and destroy more pathogens

Explanation: usa test prep

4 0

3 years ago

Read 2 more answers

A scientist is studying a new chemical he hopes will prevent insects from eating raspberry bushes. he sprays the chemical on a r

Law Incorporation [45]