Which hormones are classified as steroid hormones? select all that apply.
a) oxytocin
b) testosterone
c) epinephrine
d) thyroid hormone
e) cortisol
Ans:
b) testosterone
e) cortisol
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Endocannabinoids are neuromodulators that decrease neurotransmitter release from presynaptic neurons
Indicate whether this statement is true or false.
Nerves
a. contain afferent nerve fibers b. contain efferent nerve fibers c. are present within the peripheral nervous system d. do not contain complete neurons e. exhibit all of the above characteristics
Once excitation-contraction coupling has occurred, calcium ion concentration increases dramatically in the:
A) cytosol of the muscle fiber. B) sarcoplasmic reticulum. C) sarcolemma. D) terminal cisterna.
Which of the following is the uppermost part of the digestive tract?
A) spleen B) stomach C) pharynx D) esophagus E) intestine