At a chemical synapse, the presynaptic and postsynaptic neurons touch and chemicals are exchanged through gap junctions
Indicate whether the statement is true or false
FALSE
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Individual cells in the human blastocyst begin to grow at each cell division:
A. after the inner cell mass forms. B. after the blastocyst forms. C. after the blastocyst reaches the uterus. D. after implantation in the uterine wall. E. after development of the placenta.
Individuals with Marfan syndrome experience an eyesight problem called ____________________
Fill in the blank(s) with correct word
It's your birthday and you splurge with a big slice of chocolate cake, heavy on the icing. Shortly afterwards, your blood glucose levels rise until an endocrine mechanism (secretion of insulin) counteracts this rise and glucose levels decline. The initial change in blood glucose and insulin response that follows is an example of:
A. physiological constancy. B. diffusion. C. homeostasis. D. positive feedback. E. lack of homeostasis.
In humans, skin color is controlled by several genes. Thus, skin color is a(n) ____ characteristic.
a. dominant b. co-dominant c. epistatic d. pleiotropic e. recessive