From which of the primary germ layers of the embryo does the epidermis of the skin develop?
a) Endoderm
b) Ectoderm
c) Mesoderm
d) All of these choices are correct.
e) Both endoderm and ectoderm.
Answer: b
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Which is NOT an endocrine function performed by the liver?
A. Secreting insulin-like growth factor 1 B. Secreting angiotensinogen C. Secreting insulin D. Producing plasma proteins that bind hormones E. Clearing hormones from plasma
Pain may be elicited by thermal or chemical stimuli
Indicate whether the statement is true or false
The same chemical messenger may be either a hormone or a neurotransmitter, depending on its source and mode of delivery to the target tissue
Indicate whether the statement is true or false
What is the main role of Mg2+ in the body?
A. Cofactors for intracellular enzymes B. Nerve impulse C. Muscle contraction D. Blood clotting