Contraction of the external intercostal muscles causes which of the following to occur?

A. The diaphragm moves downward

B. The rib cage is compressed

C. The thoracic cavity volume decreases

D. The ribs and sternum move upward

Answer Explanation:

The intercostal muscles are muscles are located along the ribs. The intercostal muscles assist in respiration mechanically. This allows the expansion and contraction of the thorax.
Contraction of the external intercostal muscle causes the ribs and sternum move upward.

Therefore, the Correct Answer is D.

Q #1: Base your answer on the graph and on your knowledge of biology. Which is a true statement about the relationship between pH and enzyme action?

A. All enzymes work best at a neutral pH.

B. Adding more acid does not affect the rate of activity of an enzyme.

C. Enzymes function only in a pH range of 4.0 to 5.5.

D. The activity of an enzyme is affected by pH.

Answer Explanation
Q #2: The process that moves nutrients into the blood or lymph is

A. digestion

B. ingestion

C. elimination

D. absorption

Answer Explanation

Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma.

Ingestion is the process of taking food, drink, or another substance into the body by swallowing or absorbing it.

Elimination refers to the removal of indigestible wastes through the anus, in the form of feaces.
Q #3: Punnett squares are used by geneticists to determine the probability of different offspring genotypes. In the one shown below, what letter(s) belong in the lower right box?

A. AA

B. Aa

C. aA

D. aa

Answer Explanation

From the given Punnett square, we can cross the genotypes of the two parents and established the phenotypes the offspring will have. The Punnett square is filled as:

A

a

a

Aa

aa

a

Aa

aa

The requested answer is aa.

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Contraction of the external intercostal muscles causes which of the following to occur?

More Questions on TEAS 7 Science

Q #1: Base your answer on the graph and on your knowledge of biology. Which is a true statement about the relationship between pH and enzyme action?

Answer Explanation

Q #2: The process that moves nutrients into the blood or lymph is

Answer Explanation

Q #3: Punnett squares are used by geneticists to determine the probability of different offspring genotypes. In the one shown below, what letter(s) belong in the lower right box?

Answer Explanation

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