**All of the following correctly describe the fate of the embryonic layers of a vertebrate EXCEPT:
a..neural tube and epidermis develop from ectoderm
b..linings of the digestive organs and lungs develop from endoderm
c..notochord and kidneys develop from endoderm
d..skeletal muscles and heart valves develop from mesoderm
e..reproductive organs and blood vessels develop from mesoderm
(i think its c, but im not sure)
**which of the following is most effective in lowering the body temperature of a mammal?
a..erection of the fur
b..involuntary contraction of skeletal muslces
c..increased epinephrine (adrenaline) secretion
d..increased flow of blood to the skin
e..increased metabolic activity
(i think its either d or e but im not too sure)
**in humans, the HIV virus primarily attacks which of the following types of cells?
a..epidermal cells
b..red blood cells
c..white blood cells
d..glial cells
e..neurons
(i think its c or d but im not too sure)
a..neural tube and epidermis develop from ectoderm
b..linings of the digestive organs and lungs develop from endoderm
c..notochord and kidneys develop from endoderm
d..skeletal muscles and heart valves develop from mesoderm
e..reproductive organs and blood vessels develop from mesoderm
(i think its c, but im not sure)
**which of the following is most effective in lowering the body temperature of a mammal?
a..erection of the fur
b..involuntary contraction of skeletal muslces
c..increased epinephrine (adrenaline) secretion
d..increased flow of blood to the skin
e..increased metabolic activity
(i think its either d or e but im not too sure)
**in humans, the HIV virus primarily attacks which of the following types of cells?
a..epidermal cells
b..red blood cells
c..white blood cells
d..glial cells
e..neurons
(i think its c or d but im not too sure)