ati teas 7 science

ati teas 7 science Related

Review ati teas 7 science related questions and content

What is the fundamental unit of the nervous system?

  • A. Neuron
  • B. Nerve
  • C. Ganglion
  • D. Neuroglia
Correct Answer: A

Rationale: The correct answer is A: Neuron. Neurons are the fundamental building blocks of the nervous system. These specialized cells play a crucial role in transmitting information through electrical and chemical signals. While nerves are comprised of bundles of neurons and ganglia consist of clusters of nerve cell bodies located outside the central nervous system, neuroglia serve as support cells for neurons. Neurons are specifically responsible for processing and transmitting information within the nervous system, making them the essential unit of this complex system. Choices B, C, and D are incorrect as nerves are bundles of neurons, ganglia are clusters of nerve cell bodies outside the central nervous system, and neuroglia are support cells for neurons, not the fundamental units responsible for information processing and transmission.

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Which type of muscle is responsible for voluntary movements?

  • A. Smooth
  • B. Skeletal
  • C. Cardiac
  • D. Involuntary
Correct Answer: B

Rationale: The corrected question is asking about the type of muscle responsible for voluntary movements, which is skeletal muscle (Choice B). Skeletal muscle is under conscious control and is responsible for voluntary movements like walking or lifting objects. Smooth muscle (Choice A) is found in organs like the intestines and blood vessels, responsible for involuntary movements. Cardiac muscle (Choice C) is specific to the heart and is also involuntary. 'Involuntary' (Choice D) is a general term and does not specify a type of muscle responsible for voluntary movements.

Dense irregular connective tissue, found in tendons and ligaments, provides:

  • A. Flexibility
  • B. Lubrication
  • C. Insulation
  • D. Tensile strength
Correct Answer: D

Rationale: Dense irregular connective tissue, found in tendons and ligaments, provides tensile strength. Tendons and ligaments need to withstand tension and forces acting upon them, and the dense irregular connective tissue helps provide this strength and support. Choice A, flexibility, is incorrect because tendons and ligaments primarily provide support and stability rather than flexibility. Choice B, lubrication, is not the main function of dense irregular connective tissue in tendons and ligaments. Choice C, insulation, is also incorrect as this tissue type is not primarily involved in providing insulation.

DNA has both a 'sense' and 'antisense' strand. What is true about the antisense strand?

  • A. It runs 5' to 3'.
  • B. It runs 3' to 5'.
  • C. It is used in replication.
  • D. It is the direction in which DNA is stored.
Correct Answer: B

Rationale: The correct answer is B. The antisense strand runs 3' to 5', which is opposite to the direction of the sense strand. It serves as the template strand for transcription, where an RNA molecule is synthesized complementary to the antisense strand. Choice A is incorrect because the antisense strand runs in the opposite direction. Choice C is incorrect as the antisense strand is primarily involved in transcription, not replication. Choice D is incorrect as the direction of DNA storage is not determined by the antisense strand.

Which of the following pathologies is caused by a virus?

  • A. Asthma
  • B. Cystic Fibrosis
  • C. Epiglottitis
  • D. Influenza
Correct Answer: D

Rationale: The correct answer is D, Influenza. Influenza is a viral infection caused by the influenza virus. Asthma and cystic fibrosis are not caused by viruses. Asthma is a chronic respiratory condition related to inflammation and airway constriction, while cystic fibrosis is a genetic disorder affecting the lungs and other organs. Epiglottitis is most commonly caused by bacteria, particularly Haemophilus influenzae type B, rather than a virus.

What is the acceleration due to gravity near the Earth's surface?

  • A. 9.8 meters per second squared (m/s²)
  • B. 6.3 meters per second squared (m/s²)
  • C. 5.0 meters per second squared (m/s²)
  • D. 12.5 meters per second squared (m/s²)
Correct Answer: A

Rationale: The acceleration due to gravity near the Earth's surface is approximately 9.8 m/s². This value is commonly used in physics calculations and represents the rate at which an object accelerates towards the Earth when in free fall. The acceleration due to gravity is a constant value near the Earth's surface and affects the motion of all objects. Choices B, C, and D are incorrect as they do not represent the standard value of 9.8 m/s². Understanding the correct value of acceleration due to gravity is fundamental in physics as it helps in solving various problems related to motion, forces, and energy.

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