Answer:
Spiracles. Gasses enter / leave the insect through small openings called spiracles. ...
Tracheal Tubes. Insects have an impermeable exoskeleton and internal gas exchange system in order to prevent water loss (desiccation)
Tracheoles.
Taenidia (Chitin Rings)
Air Sacs
Explanation:
Answer:
The movement of potassium ions out of the axon.
Explanation:
The membrane potential or cell potential is the difference in the electric potential outside and inside of the cell. The cell potential is important for the transmission of nerve impulse.
The resting potential of the cells is -70mV. The movement of sodium ions causes the cell depolarization and makes the membrane potential more positive. The cells sometimes attain the more negative membrane potential stage known as hyperpolarization. This state mainly occur by the efflux or the movement of the potassium ions out of the axon.
Thus, the correct answer is option (A).
Answer:
A persons' parents genes (and maybe Natural Selection)
Wow that is a lot of reading. You should be wise and do it yourself. To much sorry .
Answer:
pulmonary vein
Explanation:
The pulmonary veins
transfer oxygenated blood from the lungs to the heart.
It helps complete the pulmonary circuit, by receiving oxygenated blood in the alveoli and returning it to the left atrium.