Use the eye wash station immediately! Hope this helped!
-Twixx
Answer:
1. Potassium
2. increasing towards zero
3. hyperpolarization
4. voltage-regulated Potassium
Explanation:
Membrane potential can be defined as the difference in electric charges inside and outside of a cell. The resting membrane potential (RMP) occurs when there is no net current across the membrane and therefore the cell is in a non-excited state. At the RMP, sodium ions (Na+) are more concentrated inside the extracellular fluid (ECF) than inside the intracellular fluid (ICF), while potassium ions (K+) are more concentrated inside the ICF. The diffusion of K+ outside the cell triggers its hyperpolarization, by becoming the membrane potential more negative compared to the resting potential. As the potential nears +35 mV, the voltage-regulated potassium channels are open, thereby K+ ions leave the cell down its concentration gradient, while voltage-gated Na+ channels become saturated and inactivate.
Starfish has a endoskeleton
a coral has a exoskeleton
sponge has neither
Note: <em>You will find the missing image needed to answer the question in the attached files</em>.
Answer:
- The hallux (big toe) of Carpolestes has synapomorphic features shared with the euprimate.
- The nail on the distal phalange is an example of a synapomorphic feature.
Explanation:
- The symplesiomorphic features are those shared by two or more organisms that inherited it from a common ancestor, but this trait is older in relation to those traits exhibited in other descendants of that same ancestor.
- The synapomorphic features are those shared by two or more organisms that inherited it from a common ancestor, and which evolved for the first time in it.
There are more synapomorphic features shared with the euprimates. The nail on the distal phalange of the big toe and euprimates might be considered as a synapomorphic feature. It is quite different from the same nail of the tree shrew.
