what is the main function of the large intestine

ATI TEAS 7

Practice TEAS Science Test

1. What is the main function of the large intestine?

A. To absorb proteins
B. To absorb water and form feces
C. To produce enzymes for digestion
D. To store fat

Correct answer: B

Rationale: The main function of the large intestine is to absorb water and form feces from waste material. Choice A is incorrect because the absorption of proteins primarily occurs in the small intestine. Choice C is incorrect as the production of enzymes for digestion mainly takes place in the pancreas and small intestine. Choice D is incorrect as the storage of fat is not a primary function of the large intestine.

2. Which condition can lead to blood clots and stroke?

A. Aneurysm
B. Arrhythmia
C. Asthma
D. Hypertension

Correct answer: D

Rationale: Hypertension is the correct answer. Hypertension can cause damage to blood vessels, increasing the risk of blood clots forming, which can potentially lead to a stroke. Aneurysm is a localized, abnormal dilation of a blood vessel that can lead to complications but does not directly cause blood clots and strokes. Arrhythmia refers to irregular heart rhythms and is not directly linked to the formation of blood clots. Asthma is a chronic respiratory condition and does not typically lead to blood clots and strokes.

3. What is the ethical concern surrounding genetic engineering?

A. Risk of introducing new diseases
B. Potential for misuse and discrimination
C. Unforeseen consequences on ecosystems
D. All of the above

Correct answer: D

Rationale: A) Risk of introducing new diseases: Genetic engineering involves manipulating the genetic material of organisms, which can potentially lead to the creation of new diseases or the spread of existing ones in unintended ways. This risk raises ethical concerns about the potential harm to human health and the environment. B) Potential for misuse and discrimination: Genetic engineering technologies can be misused for purposes such as creating biological weapons or enhancing certain traits in individuals, leading to discrimination based on genetic makeup. This raises ethical concerns about fairness, justice, and the potential for societal harm. C) Unforeseen consequences on ecosystems: Genetic engineering can have unintended consequences on ecosystems, such as disrupting natural balances or harming biodiversity. These unforeseen impacts raise ethical concerns about the responsibility of scientists and policymakers to consider the long-term effects of genetic modifications on the environment. Therefore, the correct answer is D because all the options present valid ethical concerns associated with genetic engineering.

4. How does polarization affect the intensity of light passing through a polarizing filter?

A. All light passes through regardless of polarization.
B. Light with the same polarization as the filter passes through, while others are blocked.
C. Light with higher intensity passes through, while weaker light is blocked.
D. The intensity is reduced for all light, regardless of polarization.

Correct answer: B

Rationale: A polarizing filter only allows light waves with a specific orientation (polarization) to pass through while blocking light waves with different orientations. Therefore, light with the same polarization as the filter will pass through, while light with different polarizations will be blocked. This results in a reduction in intensity for light passing through the polarizing filter. Choice A is incorrect because a polarizing filter selectively filters light based on its polarization. Choice C is incorrect as the intensity of light passing through is determined by its polarization, not solely its intensity. Choice D is incorrect because a polarizing filter affects light based on its polarization, not uniformly reducing the intensity for all light passing through.

5. A 10 kg box rests on a frictionless surface. A horizontal force of 20 N is applied to the box. What is the box's acceleration?

A. 0.5 m/sÂ²
B. 1 m/sÂ²
C. 2 m/sÂ²
D. 10 m/sÂ²

Correct answer: B

Rationale: The acceleration of an object is given by the formula $a = \frac{F}{m}$, where $F$ is the net force acting on the object and $m$ is the mass of the object. In this case, the net force acting on the box is 20 N, and the mass of the box is 10 kg. Plugging these values into the formula, we get $a = \frac{20}{10} = 2$ m/sÂ².