Identify the item that is not taken into a cell via receptor-mediated endocytosis
a. amino acid
b. cholesterol
c. vitamin B12
d. iron
e. insulin
A
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mRNA is needed to synthesize ________ in the cytoplasm
A) carbohydrates B) lipids C) proteins D) phospholipids E) salts
When you stand for a long period of time, why should you "lock" your knee in extended position? How does the knee lock?
What will be an ideal response?
Which statement is incorrect?
a. Salivation is entirely under neural control. b. Parasympathetic stimulation and sympathetic stimulation both increase salivary secretion. c. The acquired salivary reflex occurs upon stimulation of chemoreceptors and/or pressure receptors in the mouth. d. Parasympathetic stimulation produces a watery saliva rich in enzymes. e. The salivary center is located in the medulla.
We live in an ever-changing environment outside of our body, yet our internal conditions remain relatively stable. This is called ________
A) homeostasis B) metastasis C) adaptation D) evolution E) responsiveness