True because sprains can occur when walking or exercising on an uneven surface, landing awkwardly from a jump. knee — pivoting during an athletic activity
Answer:
1 physically fit.
2 maintaining what I'm doing
3 I can run fast and for a long period of time
4 I am not strong on the upper part of my body but is stronger on my lower half
5 I do cheer so I'm pretty flexible
Answer:
placenta
Explanation:
Nutrients and waste products are exchanged between the mother and her baby through the placenta and umbilical cord without any mixing of their blood.
i got this off the wonderful world of the internet
Balance is maintained by secreting bicarbonate ions or by absorbing them.
<u>Explanation:</u>
- Chemical buffers : fraction of a second , ties up excess of H+ or bases temporarily.
- Respiratory buffers: within a minute , maintaining or reducing the level of CO2.
- Renal buffers: hours or takes even days, moves away metabolic acid and excess of base.
