Which of the following is the main characteristic of connective tissue?
A. Large amount of closely packed cells
B. Large amount of extracellular material
C. Small amount of extracellular material
D. The ability to conduct a current
Answer: B
You might also like to view...
Reactive hyperemia is
A) lack of blood flow due to an allergic reaction. B) reflex contraction of smooth muscle in response to stress. C) increased blood flow following a period of reduced blood flow. D) increased blood pressure after stress. E) None of the answers are correct.
Which of the following statements concerning the absolute refractory period is inaccurate?
a. the absolute refractory period refers to the period of time during which another action potential cannot be initiated b. the absolute refractory period corresponds to the time period during which the Na+ gates are first opened and then closed and inactivated. c. the relative refractory period immediately follows the absolute refractory period d. the absolute refractory period occurs during the after hyperpolarization phase of the action potential. e. the absolute and relative refractory periods assure the unidirectional spread of the action potential down the nerve fiber away from the initial site of activation.
When comparing oogenesis and spermatogenesis, which of the following is not true?
A. Both oogenesis and spermatogenesis produce four functional gametes. B. Oogenesis and spermatogenesis produce haploid gametes. C. Oogenesis and spermatogenesis begin in the gonads (ovaries and testes). D. The products of oogenesis and spermatogenesis have half the number of chromosomes as the parent cell.
Which birth control method provides some protection against sexually transmitted diseases?
A) birth control pills B) diaphragm with spermicide C) condoms D) intrauterine device E) surgical sterilization