The internal environment of a multicellular organism is the fluid surrounding cells, through which life-sustaining exchanges are made
a. True
b. False
Indicate whether the statement is true or false
True
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Answer the following statement(s) true (T) or false (F)
1. Only vowels can function as syllable nuclei. 2. Typically consonants have more acoustic intensity than vowels. 3. The vowel [i] is a high vowel that is unrounded. 4. In the standard pronunciation of General American English, only rising diphthongs are typically produced. 5. There is no difference in the production of diphthongs versus two vowels following one another.
The vestibulocochlear nerve is the only cranial nerve that doesn't exit the skull via an opening or foramen.
Answer the following statement true (T) or false (F)
Which of the following statements about the action potential is false?
A) The rapid depolarization phase is caused by the entry of potassium ions. B) During the repolarization phase, sodium channels close and potassium channels open. C) During the depolarization phase, membrane potential becomes positive. D) During the hyperpolarization phase, the ion pumps re-establish the sodium and potassium concentrations across the cell membrane. E) Repolarization occurs as potassium ions leave the axon.
How are the phospholipids arranged to form the plasma membrane?
Single layer with hydrophilic heads outward Double layer with hydrophobic tails facing inward toward each other Double layer with hydrophilic heads facing inward toward each other Double layer with phospholipids on the outside and proteins on the inside