Phospholipids have a hydrophilic end which is
A. polar and water-soluble.
B. nonpolar and water-soluble.
C. polar and water-insoluble.
D. nonpolar and water -insoluble.
A
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Which of the following structures is probably NOT directly involved in memory?
A) prefrontal cortex B) medulla oblongata C) thalamus D) hippocampus
If glucose is not reabsorbed in the tubular fluid, ___________ increases
A) the osmotic pressure B) glomerular filtration rate C) hydrostatic pressure D) sodium reabsorption
The ascending limb of the loop of Henle is where
a. NaCl passively leaves the tubular fluid down its concentration gradient b. NaCl is actively transported into the interstitial fluid, leaving water behind because the tubular cells are not permeable to water c. K+ is secreted d. aldosterone stimulates Na+ reabsorption e. none of the above occur
What is one difference between visceral reflexes and somatic reflexes?
A. Visceral reflexes do not require interneurons in the CNS, whereas most somatic reflexes do. B. Visceral reflexes do not require afferent neurons, whereas somatic reflexes do. C. Visceral reflexes are unconscious while somatic reflexes are conscious. D. Visceral reflexes are stereotyped whereas somatic reflexes are unpredictable. E. Visceral reflexes involve somewhat slower responses than somatic reflexes.