The hollow cavity within the blastocyst is the
A) blastula.
B) gastrula.
C) blastocoele.
D) trophoblast.
E) ootid.
C
You might also like to view...
The abortion pill works by blocking progesterone and two days later, ____ is/are given to contract the uterus.
Fill in the blank(s) with the appropriate word(s)
Which of the following systems acts like the nervous system,but with slower reaction time and longer-lasting effects?
a. Integumentary system b. Skeletal system. c. Cardiovascular system. d. Endocrine system.
Which of the following statements is incorrect?
A) The contractions of skeletal muscles pull on tendons and move bones of the skeleton. B) Skeletal muscles store nutrient reserves. C) Skeletal muscles are responsible for the pumping action of the heart. D) Skeletal muscles support the weight of some internal organs. E) Skeletal muscle contractions help maintain body temperature.
What action causes the second heart sound heard through a stethoscope?
A) Opening of the atrioventricular valves B) Opening of the semilunar valves C) Closing of the atrioventricular valves D) Closing of the semilunar valves