Oxygen diffuses into the bloodstream from the alveoli because of:
an increased heart rate.
a difference in concentration of oxygen.
an increased breathing rate.
O a difference in concentration of plasma.

The body uses fight or flight as a way of defending itself from stress. question 2 options: true false

Can you get chlamydia from sleeping in the same bed

Analyze the impact of the availability of health services in the community and the world. research various school and community health services for people of all ages such as vision and hearing screenings and immunization programs. identify situations requiring professional health services for people of all ages such as primary, preventive, and emergency care.