Answer:
The correct answer is - Western fence lizard
, Xenopus (African clawed frog)
, Fruit Fly
, Turtle
, and Sea urchin.
Explanation:
An ectotherm is an organism that also known as the cold-blooded animal. Such animals experience body temperature regulation based on the external atmosphere or condition like sunlight and other condition.
This group includes a different group of animals such as reptiles, amphibians, fishes, and invertebrates. From the given options the cold-blooded animals or ectotherm are known are - Western fence lizard
, Xenopus (African clawed frog)
, Fruit Fly
, Turtle
, and Sea urchin as their internal physiological conditions does not play a major role in regulation of body temperature and external conditions play a major role.
Thus, the correct answer is - Western fence lizard
, Xenopus (African clawed frog)
, Fruit Fly
, Turtle
, and Sea urchin.
The reduced potential causes hundreds of <u>voltage-gated sodium</u> channels to open on that part of the cell membrane. The depolarization of the cell causes more of <u>voltage-gated sodium </u>channels to open in adjacent parts of the cell membrane. This begins the wave of of <u>depolarization</u> moving down the axon. Depolarization begins at the <u>axon hillock.</u>
Explanation:
When there is no neuron signaling it becomes polarized, termed as resting membrane potential (RMP) at a threshold voltage (around -55 mV), due to the action of the sodium-potassium pump and the potassium leak channels.
When a change in the RMP occurs, depolarization takes place which causes the voltage-gated sodium channels to open and sodium ions rush into the nerve cell which in turn will increase the voltage threshold to nearly around +40 mV and also charges the neuron positive. This depolarization moves down the axon. This increase in threshold stops the sodium influx and opens the potassium channels to rush the potassium out of the cell.
All these actions decrease the membrane potential leading to a wave of depolarization and going back to resting state. Depolarization begins depending upon the potential gradient at the axon hillock.
Both types of tissues are made of differentiated cells that have a specific function.
Both types of tissues contain cells that lost the ability to divide
