TEAS Practice Test Science

Correct Answer: B

Rationale: The correct answer is B: Somatic. The somatic nervous system controls voluntary movements by sending signals from the brain to skeletal muscles. It is under conscious control. Autonomic (A), sympathetic (C), and parasympathetic (D) systems control involuntary functions like heart rate and digestion. These systems operate without conscious effort, making them unsuitable for controlling voluntary movements.

Correct Answer: B

Rationale: The correct answer is B: To produce bile. The liver produces bile, which is essential for the digestion and absorption of fats in the small intestine. Bile helps emulsify fats, breaking them down into smaller droplets for easier digestion. A: To absorb water - This is not the primary function of the liver. Water absorption primarily occurs in the intestines. C: To store glucose - While the liver does store glucose in the form of glycogen, its primary function is not to store glucose. D: To regulate metabolism - While the liver does play a role in metabolism, its primary function in the digestive system is to produce bile.

Correct Answer: B

Rationale: The correct answer is B: Scapula. Flat bones are thin, flattened bones that provide protection and allow for muscle attachment. The scapula fits this description as it is a thin, flat bone located on the back of the shoulder. The other choices (A: Femur, C: Humerus, D: Tibia) are long bones that are not thin and flat like flat bones. The femur, humerus, and tibia are all weight-bearing bones with a different shape and function compared to flat bones.

Correct Answer: B

Rationale: The correct answer is B: White blood cells. White blood cells are a crucial component of the immune system as they play a key role in defending the body against infections and diseases. They help identify and destroy pathogens, produce antibodies, and regulate the immune response. Red blood cells (A) are responsible for transporting oxygen, platelets (C) are involved in blood clotting, and plasma (D) is the liquid component of blood, but they are not directly involved in the immune response. Therefore, white blood cells are the correct choice for being a component of the immune system.

Correct Answer: B

Rationale: The correct answer is B: Ball-and-socket joint. This joint allows for a wide range of motion due to its structure where a rounded end of one bone fits into a cup-like socket of another bone. The shoulder and hip joints are prime examples of ball-and-socket joints, enabling movements in multiple directions. A: Hinge joints, like the elbow, allow movement in one plane. C: Pivot joints, like the neck, allow rotational movement. D: Saddle joints, like the thumb, allow for various movements but not the same wide range as ball-and-socket joints.