Anatomy and Physiology

Anatomy and Physiology Related

Review Anatomy and Physiology related questions and content

Which cavity of the heart has the thickest wall?

  • A. Right atrium
  • B. Left atrium
  • C. Right ventricle
  • D. Left ventricle
Correct Answer: D

Rationale: The correct answer is the left ventricle. The left ventricle has the thickest wall among the heart cavities as it needs to pump oxygenated blood to the entire body, requiring more force and muscle strength. Its thick wall helps generate enough pressure to propel blood through the systemic circulation. The other choices, including the right atrium, left atrium, and right ventricle, do not have as thick walls as the left ventricle because their functions involve receiving and transferring blood with lower pressure requirements.

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What is the cause of the burning sensation associated with anaerobic respiration?

  • A. Carbon dioxide
  • B. Lactic acid
  • C. Oxygen
  • D. Glucose
Correct Answer: B

Rationale: The burning sensation associated with anaerobic respiration is caused by the buildup of lactic acid in muscles. When oxygen supply to tissues is insufficient, the body produces lactic acid. During intense exercise when the oxygen demand exceeds supply, lactic acid accumulates, leading to the burning sensation. Therefore, lactic acid is responsible for the burning sensation experienced in anaerobic respiration.

The calcaneus is located in what part of the body?

  • A. Foot.
  • B. Mouth.
  • C. Head
  • D. Hand.
Correct Answer: A

Rationale:

Where is the parathyroid gland located?

  • A. neck
  • B. back
  • C. side
  • D. brain
Correct Answer: A

Rationale: The parathyroid gland is located in the neck. It consists of four small glands situated behind the thyroid gland. These glands play a crucial role in regulating calcium levels in the body. The correct anatomical location of the parathyroid gland is in the neck, specifically behind the thyroid gland, making choice A the correct answer.

Which hormones regulate testicular activity?

  • A. FSH
  • B. LH
  • C. GH
  • D. Both FSH and LH
Correct Answer: D

Rationale: Testicular activity is regulated by both follicle-stimulating hormone (FSH) and luteinizing hormone (LH). FSH stimulates sperm cell production in the testes, while LH stimulates testosterone production by Leydig cells in the testes. Therefore, both FSH and LH are essential in controlling testicular activity.

Which muscle of the quadriceps group is located on the lateral surface of the lower extremity?

  • A. Vastus lateralis
  • B. Gastrocnemius
  • C. Anterior tibialis
  • D. Rectus femoris
Correct Answer: A

Rationale: The correct answer is A: Vastus lateralis. The vastus lateralis is a muscle of the quadriceps group that is situated on the lateral side of the lower extremity. It is responsible for extending the knee joint. Gastrocnemius (choice B) is a muscle located in the calf, Anterior tibialis (choice C) is a muscle in the anterior compartment of the leg, and Rectus femoris (choice D) is a muscle of the quadriceps group but is not located on the lateral surface of the lower extremity. Therefore, they do not match the description provided in the question and are incorrect choices.

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