Why does the heart automatically adjust the flow of blood to match activity levels?
a.
extreme activity damages blood cells and the body needs replacements.
b.
the heart requires more oxygen when exercising.
c.
it builds up a higher level of oxygen in the blood.
d.
organs and muscles require more blood under stress.

Jordan is now 19-years old. as an infant, jordan reached many gross motor skill milestones, such as holding his head up, rolling over, sitting, and standing, at normal times. however, he was considered a "late walker" because he took his first steps at 17 months. by 2 years old, his parents noticed a hyperlordotic posture while he was standing. a gower's sign and trendelenberg gait were noted by age four. throughout his childhood, he suffered progressive muscle weakness, especially in the proximal musculature of the arms, pelvis, and legs. he required orthotic braces to assist his walking and was confined to wheelchair ambulation by age 13. at 16, he was hospitalized with bronchitis requiring antibiotic treatment, but recovered. jordan has a history of progressive muscle weakness, but no history of muscle pain or spasm, chest pain, or irregular heartbeat. the only medications that he normally takes are calcium and fluoride supplements. jordan has three siblings. his older and younger sisters have never had any major medical issues. jordan's older brother is also to a wheelchair with problems similar to jordan's. no other immediate or distant family members have musculoskeletal issues.1. jordan’s history aligns most closely with which diagnosis? a. amyotrophic lateral sclerosisb. multiple sclerosisc. duchenne muscular dystrophyd. myotonic dystrophy2. jordan had a biopsy of the left gastrocnemius muscle when he was 5 years old. based on your answer for his diagnosis, describe the microscopic pathological changes that the pathologist would have noted.3. explain, in your own words, why jordan’s brother appears to have the same disease and why his sisters are unaffected.

Wheeled coach ambulance uses an interactive computer program to develop and document its products. what is it called?

Why girls are tan and why they fake tan