Identify the true statement(s) about the plasma membrane
a. Its lipid region allows most ions to diffuse between the cytosol and ECF.
b. Its channels allow cholesterol to diffuse between the ECF and cytosol.
c. Some of its carriers transport sodium.
d. Its phospholipids are held to one another by CAMs.
e. All except its phospholipids are held to one another by CAMs.
C
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Dancers will use a technique called "spotting" when they perform spins of the body. By holding their head and eyes on a fixed point in front of them as their body spins they reduce the amount of head spinning and this prevents dizziness
Which of the following is the most likely explanation for why this works? A) This will help to reduce the lateral flection of the head and will prevent hyper polarization or depolarization of the hair cells in the macula. B) This helps keep the motions detected by the eyes congruent (aligned) with the motions sensed by the vestibular apparatus. C) Reducing the inertia of head spin will reduce the flow of endolymph that deflects the hair cells of the crista ampullaris. D) When the eyes send a static vision of stability to the brain, it is tricked into believing the body is still and therefore dizziness will not occur.
Which of the following assessments uses the reflex hammer?
a. wheelbarrow technique c. toe pinch response b. knee jerk reaction d. none of the above
Endocrine glands secrete hormones through ducts into the blood
Indicate whether the statement is true or false
Which two hormones in your body are absolutely essential for survival?
A) calcitonin and insulin B) parathyroid hormone and aldosterone C) estrogen and testosterone D) somatotropin and cortisol E) vasopressin and thyroxine