the major function of the axial skeleton is to:
provide central support for the body and protext internal organs.
when a muscle is unable to respond to stimuli temporarily, it is in which of the following periods?
smooth muscle is characterized by all of the following except:
there are more thick filaments than thin filaments.
immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the _______ period during which the events of excitation-contraction coupling occur.
athletes sometimes complain of oxygen debt, a condition that results when insufficient oxygen is available to completely break down pyruvic acid. As a result, the pyruvic acid is converted to:
the most distinguishing characteristic of muscle tissue is:
the abiblity to transform chemical energy into mechanical energy
there are three layers of neurons in the retina. the axons of which of these neuron layers from the optic nerves?
choose the most accurate statement about sound
a ten-decibel increase represents a tenfold increase in sound intensity.
which of the following is not a characteristic of olfactory receptor cells?
they are unipolar neurons
which of the following is true about photoreceptors?
rods absorb light throughout the visual spectrum but confer only gray tone vision
light passes through the following structures in which order?
cornea, aqueous humor, lens, vitreous humor
which of the following glands are responsible for 60% of the synthesis of semen?
the seminal vesicles
the constancy of the chromosome number from one cell generation to the next is maintained through:
in humans, separation of the cells at the two-cell state following fertilization may lead to the production of twins, which in this case would be:
select the correct statement about male sexual response:
ejection is the result of vascular spaces in the rectile tissues filling with blood.
select the correct statement about the uterine cycle.
if fertilization occurs, the corpus leutum is maintained by a hormone secreted by the developing embryo
the basic difference between spermatogenesis and oogenesis is that
in oogenesis, one mature ovum is produced, and in spermatogenesis four mature sperms are produced from the parent cell
which of the following is a correct statement about uterine tubes?
the infundibulum is the funnel-shaped region near the ovary