TEAS 7 science practice

TEAS 7 science practice Related

Review TEAS 7 science practice related questions and content

What is the process of transporting molecules across the cell membrane against a concentration gradient called?

  • A. Diffusion
  • B. Osmosis
  • C. Active transport
  • D. Facilitated diffusion
Correct Answer: C

Rationale: A) Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration, which does not require energy input.
B) Osmosis is the movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
C) Active transport is the process of transporting molecules across the cell membrane against a concentration gradient, requiring energy in the form of ATP to move substances from an area of lower concentration to an area of higher concentration.
D) Facilitated diffusion is a type of passive transport that involves the use of transport proteins to move molecules across the cell membrane from an area of higher concentration to an area of lower concentration, without the need for energy input.

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What is the significance of a healthy gut microbiome?

  • A. Production of digestive enzymes
  • B. Boosting the immune system and nutrient synthesis
  • C. Breakdown of complex carbohydrates
  • D. Regulation of appetite
Correct Answer: B

Rationale: A healthy gut microbiome plays a crucial role in boosting the immune system by defending against harmful pathogens, synthesizing essential nutrients like vitamins, aiding in the digestion of certain foods, and maintaining overall gut health. While the gut microbiome does contribute to the breakdown of complex carbohydrates and regulation of appetite, its significance extends beyond these functions to include immune support and nutrient synthesis. Choice A, production of digestive enzymes, is not the primary significance of a healthy gut microbiome. Choice C is a function related to the gut microbiome but is not the sole significance. Choice D, regulation of appetite, is important but not as central as the immune system support and nutrient synthesis provided by a healthy gut microbiome.

Which organ plays a significant role in immune cell production and maturation?

  • A. Liver
  • B. Kidneys
  • C. Bone marrow
  • D. Spleen
Correct Answer: C

Rationale: The bone marrow is the correct answer. It is the primary site for immune cell production and maturation. The bone marrow is responsible for generating various types of blood cells, including white blood cells crucial for the immune system's function. The liver, kidneys, and spleen have essential functions in the body, such as filtering blood, detoxification, and storage of blood, respectively. However, they are not primarily involved in immune cell production and maturation, making them incorrect choices for this question.

Which respiratory structure is responsible for vocalization and sound production?

  • A. Trachea
  • B. Larynx
  • C. Bronchi
  • D. Alveoli
Correct Answer: B

Rationale: The correct answer is B: Larynx. The larynx, also known as the voice box, is the respiratory structure responsible for vocalization and sound production. It contains the vocal cords, which vibrate as air passes through, producing sound. The trachea (A) connects the larynx to the bronchi. While the trachea serves as the windpipe, it is not directly involved in sound production. Bronchi (C) are airway passages that branch off from the trachea and lead to the lungs, but they are not responsible for vocalization. Alveoli (D) are tiny air sacs in the lungs where gas exchange occurs, but they are not involved in sound production.

Which element has the lowest electronegativity value?

  • A. Oxygen
  • B. Fluorine
  • C. Helium
  • D. Chlorine
Correct Answer: C

Rationale: The correct answer is Helium (C). Electronegativity is the tendency of an atom to attract electrons towards itself in a bond. Helium, as a noble gas, has a very low electronegativity because its outer electron shell is already full and stable, resulting in minimal attraction for additional electrons. Oxygen (A), Fluorine (B), and Chlorine (D) are all non-noble gas elements that have higher electronegativity values compared to Helium due to their electron configurations and tendencies to attract electrons.

What is the scientific term for the windpipe, a tube that carries air from the larynx to the bronchi?

  • A. Pharynx
  • B. Trachea
  • C. Epiglottis
  • D. Bronchiole
Correct Answer: B

Rationale: The trachea is the correct scientific term for the windpipe, a tube that carries air from the larynx to the bronchi. It is an essential part of the respiratory system, enabling the passage of air to and from the lungs. The pharynx is the region behind the mouth and nasal cavity, acting as a passageway for air and food. The epiglottis is a cartilage flap that shields the trachea during swallowing to prevent food from entering the airway. Bronchioles are smaller airways that branch off from the bronchi within the lungs, further dividing and distributing air within the lungs.

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