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djyliett [7]
3 years ago
13

During the ______ _________ of an action potential, voltage-gated potassium channels are open and the voltage-gated sodium chann

els are inactivated or closed.
Biology
1 answer:
baherus [9]3 years ago
7 0

Answer:

Repolarization

Explanation:

Complete repolarization is achieved by the sodium pump. This actively pumps all the Na+ ti the outside and all the K+ to the inside. The pump requires energy in the form of ATP and is inhibited by metabolic poisons. Entry of Na+ is immediately followed by an increase in the permeability of the membrane to K+. These diffuse rapidly to the outside due to the concentration gradient. Being positively charged, the K+ reverses the polarity of the membrane making the outside positive.

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A person has trouble coordinating muscle movements. Which two tissues could be injured?
Basile [38]

Answer:

connective; epithelial

Explanation:

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2 years ago
Coloca en el orden adecuado los procesos que realiza una angiosperma en su ciclo vital:
alex41 [277]

Answer:

  1. Llegada de polen al ginecium.
  2. Formación de tubos de polen.
  3. Fertilización del gameto femenino.
  4. Formación de frutos y semillas.
  5. Germinación de la semilla.
  6. Producción de las flores.
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Explanation:

*Se adjunta un diagrama detallado y etiquetado del ciclo de vida de la angiosperma.

6 0
2 years ago
_____ is changing in order to survive better in an environment. Development Adaptation Darwinism none of the above
Scorpion4ik [409]
<span>Adaptation is a change or the process of change by which an organism or species becomes better suited to its environment. Knowing the definition of each of the terms is the easiest way to get the answer. </span>
8 0
3 years ago
Label the animal cell diagram given below
diamong [38]

Answer:

1. mitochondria  

2. centrioles

3. lysosome

4. cytoplasm (cytosol)

5. nucleolus  

6. nuclear envelope

7. chromosomes

8. cilia

9. Rough endoplasmic reticulum

10. Golgi apparatus  

11. citoesqueleton  

12. vesicles

13. ribosomes

14. smooth endoplasmic reticulum

15. cell membrane  

Explanation:

Mitochondria are the energy centers of the cell that work to produce ATP. Centrioles are organelles composed of tubulin protein that organize microtubules that serve as the cell's skeletal system. Lysosomes are vesicles that contain hydrolytic enzymes. The cytosol is a thick solution inside the cell which is enclosed by the cell membrane. The nucleolus is an organelle inside the cell nucleus involved in the transcription of ribosomal RNAs. The nuclear envelope is a membrane that surrounds the cell nucleus (in eukaryotic organisms). Chromosomes are linear molecules composed of chromatin (DNA + histone proteins) which contain the genetic material of the cells. The cilia are organelles found on eukaryotic cells involved in the movement of the cell. The rough endoplasmic reticulum is an organelle whose function is the processing of proteins synthesized in the ribosomes, while the smooth endoplasmic reticulum functions in lipid synthesis. The Golgi apparatus is an organelle involved in transporting and packaging proteins and lipids. The cytoskeleton is a dynamic network of protein filaments that act as the skeleton of the cells. Vesicles are membrane-bound structures that transport substances in the cell. The cell membrane is a lipid bilayer that acts to transport nutrients into the cell and waste products out of the cell.

3 0
2 years ago
In animals the sensory capabilities evolved over hundreds of millions of years. It is therefore not surprising that different se
I am Lyosha [343]

Answer:

Olfactory system

Explanation:

In an olfactory system, odor molecules are perceived by the olfactory receptors. These odor molecules are nothing but the chemicals which are then transduced as chemical signals into the electrical signals and sent to the brain. The brain perceives these electrical signals as smell.  

The odorant particles bind to the specific receptors located at cilia which then signal through the G protein Gαolf which then activate adenylate cyclase. Adenylate cyclase leads to cAMP production which then open a cyclic nucleotide-gated ion channel through which both sodium and calcium ion entern into the cell. Calcium ion then activates chloride channels and thereby causing transduction of electrical signal

6 0
3 years ago
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