The plasma membrane has a double layer of phospholipids with proteins dispersed throughout. These proteins help increase the durability of the membrane, as well as help with filtration.
Complete question:
The endplate potential (EPP) at the frog neuromuscular junction occurs because ACh simultaneously increases the conductance of the postsynaptic membrane to Na and K
Answer:
TRUE
Explanation:
The Acetylcholine neurotransmitter is released from the presynaptic cell by the process of exocytosis.
Once the molecule is in the intercellular space, it moves forward the postsynaptic membrane to join its receptor in the motor plate.
Once the joining has occurred, the receptor acquires a channel shape allowing the ion transference that will make possible the modification of the action potential. Ions traffic will consist of the pass of sodium and calcium to the interior of the cell and potassium to the exterior. Quantitatively, the interchange Na-K is the most significant.
K+ follows a concentration gradient, while Na+ follows an electrochemical gradient. The interchange results in an increase of positive charges in the interior of the muscular cell.
Whenever there is a sufficient number of Acetylcholine receptors are active, the depolarization threshold of the motor endplate is exceeded. This activates an action potential that extends to the rest of the muscle membrane.
Answer:
I would choose a food source that has a significant level of carbohydrates, proteins, and vitamins. <em>E.g.</em> bananas.
Explanation:
Food is one of the most important ways to increase our energy. It may be very common to feel lethargic throughout the day when one's diet is not appropriate or balanced.
According to nutriologists, bananas are one of the best foods that boost our energy. Bananas contain carbohydrates, [natural] sugar, minerals, and amino acids. Incorporating this fruit into your diet can be extremely helpful, especially if you practice sports. In fact, recent research showed that consuming bananas before and after exercising helps you maintain your body with high levels of energy throughout the day and, therefore, helps you to have a better performance.
Answer:
Researchers initially built up the geologic time scale by considering rock layers and record fossils around the world. With this data, researchers put in Earth's stone layers in request by relative age. Afterward, radioactive dating decided the supreme age of the divisions in the geologic time scale.