Answer the following statements true (T) or false (F)
1. Many of the changes that occur during adolescence are controlled by the secretion of sex hormones.
2. Osteoporosis is a degenerative joint disease of old age.
3. About 25% of the nephrons of the kidney stop functioning between the ages of 30 and 75.
4. Hypertension is another term for high blood pressure.
5. Atherosclerosis is sometimes called hardening of the arteries.
1. TRUE
2. FALSE
3. FALSE
4. TRUE
5. FALSE
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________ begins with the attachment of the blastocyst to the endometrium and continues as the blastocyst invades maternal tissues. (Note: Be sure to capitalize the first letter of your answer).
Fill in the blank(s) with the appropriate word(s).
The cardiac muscle
a. extracts oxygen and nutrients from the blood within its chambers. b. receives its blood supply primarily during ventricular systole when blood is forced into the vessels supplying the heart. c. receives its blood supply as the blood returning to the heart from the lung passes through the cardiac circulation before being pumped to the systemic circulation. d. receives most of its blood supply during ventricular diastole by means of the coronary circulation. e. none of these answers.
The directional term that means "away from the midline of the body" is
A. lateral. B. superior. C. medial. D. inferior. E. caudal.
Which of the following has uracil as one of its nucleotides?
a. DNA b. RNA c. both A and B above d. neither A nor B above