Cardiac reserve is
A. the potential increase in stroke volume someone would show if they engaged in athletic training.
B. the increase in cardiac output an individual is capable of demonstrating during vigorous exercise.
C. the amount of blood left in the heart after the ventricle has contracted during cardiac cycles at rest.
D. the blood that the heart uses to nourish its cardiac muscle and does not put into general circulation.
B
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The muscle that makes up the heart is:
a. cardiac muscle b. voluntary muscle c. involuntary muscle d. smooth muscle
Describe secondary sexual characteristics in males and females
What will be an ideal response?
Lymphoid tissue
a. stores lymphocytes. b. processes lymphocytes. c. includes the adenoids. d. is found in the lining of the digestive tract. e. all of these.
Some women (including Angelina Jolie) with mutations in tumor suppressor genes, opt for oophorectomy (removal of their ovaries) to decrease their risk of some types of cancer. Unless they take supplements, they probably will have lower circulating levels of both androgens and estrogen.
Answer the following statement true (T) or false (F)