In a species of insect that lives at cold temperatures, which of the following adaptations to the plasma membrane would help promote membrane fluidity?
A. Thinner glycocalyx
B. More cell junctions
C. More cholesterol in the membrane
D. More integral membrane proteins
E. More transmembrane proteins
Answer: C
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The term ________ describes the result from an injury that permits air to leak into the intrapleural space
A) pleurisy B) pneumonia C) pneumothorax D) pulmonary edema E) emphysema
This fontanel usually closes within 18 to 24 months after birth
a) A b) B c) C d) D e) Both A and C
Which of the following is an example of negative feedback?
A) An increase in normal body temperature triggers heat loss through enhanced blood flow to the skin and increased sweating. B) An increase in ambient room temperature triggers the thermostat to turn on the heater. C) A severe cut triggers accelerated blood clotting until the bleeding stops. D) Increased blood sugar stimulates the release of a hormone from the pancreas that stimulates the liver to release blood sugar. E) An increase in body temperature triggers a neural response that initiates physiological changes to increase body temperature.
The anaerobic reactions of cellular respiration take place in the
A. mitochondria. B. nucleus. C. cytoplasm. D. ribosomes.