During exhalation, when the diaphragm relaxes and the volume of the chest cavity decreases, how is the air pressure inside the lungs affected?
A) It increases.
B) It decreases.
C) It decreases, then increases.
D) It is unchanged.
A
You might also like to view...
Suppose the lacI repressor gene were permanently silenced by an alteration to the DNA sequence
What would be the impact on the expression of the lac operon?
a. The lac operon would be transcribed but at a low level. b. The lac operon would be transcribed at a high level. c. There would be no real impact on lac operon expression. d. The lac operon would only be expressed when lactose was present. e. The lac operon would not be expressed even when lactose was present.
A walled, immature male gametophyte is called a ____
a. spore b. pollen sac c. zygote d. sporophyte e. pollen grain
Which statement about the Malpighian tubules is FALSE?
a. Water and some solutes are transported into the Malpighian tubules via active transport. b. The Malpighian tubules empty into the gut of the insect. c. Water, some salts, and other solutes are reabsorbed into the hemolymph in the rectum. d. The excretory system of an insect may contain up to several hundred Malpighian tubules. e. The blind ends of the Malpighian tubules are bathed in hemolymph
What is the result of recombination (crossing over) during meiosis?
A) It allows the cell to complete DNA replication. B) It ensures retention of genetic information and helps to preserve cell characteristics. C) It eliminates unused genes by removing them. D) It binds homologous chromosomes tightly, so they do not accidentally separate. E) It creates chromosomes that are a new combination of paternal and maternal material.