TEAS Practice Test Science - Nurselytic

Correct Answer: B

Rationale: The liver is the organ responsible for filtering toxins from the blood. It plays a crucial role in detoxification by processing and eliminating harmful substances from the body. The kidneys primarily filter waste and excess substances from the blood to form urine, while the heart pumps blood throughout the body and the lungs facilitate gas exchange by oxygenating blood.
Therefore, the correct answer is the liver as it is specifically involved in detoxifying the blood.

Correct Answer: B

Rationale: The correct answer is B: Ball-and-socket joint. A ball-and-socket joint, like those in the shoulder and hip, allows for a wide range of motion. In a ball-and-socket joint, the rounded end of one bone fits into the cup-like socket of another bone, enabling movement in multiple directions.
Choice A, Hinge joint, is incorrect because hinge joints allow movement only in one plane, like a door hinge.
Choice C, Pivot joint, is incorrect as it allows rotational movement around a single axis, not the wide range of motion seen in the shoulder and hip.
Choice D, Saddle joint, is also incorrect as it allows movement in multiple directions but to a lesser extent compared to the ball-and-socket joint.

Correct Answer: D

Rationale: The correct answer is D, 'All of the above.' Cardiac muscle is indeed striated, short, fat, branched, and interconnected. Intercalated discs are responsible for anchoring cardiac cells together and allowing the free passage of ions. Additionally, the connective tissue endomysium provides structural support and acts as a tendon-like structure attaching muscle fibers to each other.
Therefore, all the statements in choices A, B, and C are accurate when describing the microscopic anatomy of heart muscle.

Choices A, B, and C individually represent different aspects of the structural features of cardiac muscle, making choice D the most comprehensive and correct answer.

Correct Answer: B

Rationale: The correct answer is B: Pancreas. The pancreas is the organ responsible for producing insulin. Insulin is a hormone that helps regulate blood sugar levels by allowing cells to take in glucose from the bloodstream. The liver (choice
A) plays a role in regulating blood sugar levels through glycogen storage and release but does not produce insulin. The gallbladder (choice
C) stores bile produced by the liver to aid in digestion and has no direct involvement in insulin production. The spleen (choice
D) is involved in immune function and blood storage but not in the production of insulin.

Correct Answer: B

Rationale: The correct answer is B, Parathyroid hormone. Parathyroid hormone plays a crucial role in regulating calcium levels in the blood by increasing calcium levels when they are too low. This hormone acts on the bones, kidneys, and intestines to ensure proper calcium balance in the body. Insulin (choice
A) is involved in glucose metabolism, not calcium regulation. Thyroid hormone (choice
C) primarily regulates metabolism, and while it indirectly influences calcium levels, it is not the primary regulator. Glucagon (choice
D) is involved in increasing blood glucose levels, not calcium regulation.