After the zygote begins to divide, a fluid-filled ball of cells called a(n) ____ attaches to the uterine wall
a. blastocyst
b. gastrula
c. fetus
d. endometrium
e. implant
a
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Answer the following statement(s) true (T) or false (F)
1. One valued outcome of a school physical education program is to help students learn how to achieve and maintain a healthy lifestyle. 2. According to the research findings of the 2008 Physical Activity Guidelines for Americans, for most health outcomes, additional benefits occur as the amount of physical activity increases through higher intensity, greater frequency, and/or longer duration. 3. Physical activity and physical fitness mean the same thing. 4. Individuals with chronic medical conditions should avoid physical activity. 5. Many of the beneficial affects of exercise training from both endurance and resistance activities diminish within two weeks if physical activity is substantially reduced, and benefits disappear within two to eight months if physical activity is not resumed.
Your risk for illness-from sore throats to peptic ulcers to sudden death-starts to decrease a few weeks after you've stopped smoking.
Answer the following statement true (T) or false (F)
A type of cancer that occurs in blood-making cells found in the red bone marrow is known as a/an
a. primary bone cancer b. Ewing's sarcoma c. myeloma d. osteochondroma
Exercise induces substantial changes in the pulmonary system of healthy individuals.
a. true b. false