Biology Questions, Please Lend a Hand?

[Ppokpok]

1. What part of the lower respiratory tract is made up of tiny air sacs where oxygen and carbon dioxide are exchanged?

A. Bronchioles
B. Alveoli
C. Trachea
D. Larynx

2. All the systems of the body work together to keep the internal environment of the body constant within certain limits. This process is called

A. homoeostasis.
B. positive feedback.
C. neuroglia.
D. homeopathy.

 

[Ashley Nicole]

Look up each of these terms.
The ones that match the questions are the right answers.