Match the following: Some K+ channels remain open,
and Na+ channels rest.
1. Threshold stimulus
Voltage-gated Na+ channels open.
2. Depolarization
3. Hyperpolarization
Na+ channels are inactivating, and
voltage-gated K+ channels open.
4. Repolarization
Any stimulus at or above this level
will result in action potential.

Why is excretion necessary to maintain homeostasis?

Listed in the item bank are some key terms and expressions associated with the categories seen in the venn diagram. to find out more information about items, some have more details available when you click on them. drag and drop each item onto the proper area of the diagram. if an item describes more than one category, be sure to place it in the overlapping space. viruses are tiny infectious pathogens that cause many different diseases, such as polio, and the flu. though they are similar to one celled organisms in some ways, in many ways they are very different. use the venn diagram below to show the similarities and differences between viruses and living organisms.

Consider the skeleton. which skeletal system is represented by the shaded portion of the skeleton? spongy skeleton compact skeleton axial skeleton appendicular skeleton