teas version 7 quizlet science - Nurselytic

Correct Answer: C

Rationale: Thyroxine, also known as T4, is a hormone produced by the thyroid gland that plays a crucial role in regulating the body's metabolism, growth, and development. It helps control the rate at which the body uses energy, affects protein synthesis, and influences the body's sensitivity to other hormones. Calcitonin (
A) is another hormone produced by the thyroid gland, but its primary function is to regulate calcium levels in the blood. Parathyroid hormone (PTH) (
B) is produced by the parathyroid glands and is involved in regulating calcium and phosphorus levels in the body. Insulin (
D) is a hormone produced by the pancreas that helps regulate blood sugar levels.

Correct Answer: D

Rationale: Density is the property of a substance that describes how much matter is packed into a given space. It is calculated by dividing the mass of the substance by its volume. Mass refers to the amount of matter in an object, volume is the amount of space an object occupies, and weight is the force of gravity acting on an object's mass. Density specifically relates to how tightly packed the particles of a substance are. In this context, density is the most appropriate answer as it directly addresses how matter is packed into a given space. Mass and weight are related to the quantity of matter and the force of gravity, respectively, but do not directly describe the compactness of matter in a given space. Volume, on the other hand, refers to the space occupied by an object, not the amount of matter packed into that space.

Correct Answer: C

Rationale: Potassium is essential for muscle function, including muscle contraction. A deficiency in potassium can lead to muscle weakness and cramps. While sodium, calcium, and magnesium are also important minerals for muscle function, potassium is specifically known for its role in preventing muscle cramps by regulating muscle contractions and nerve signals.

Correct Answer: C

Rationale: The main force propelling the rocket upwards is the thrust from the rocket engine. Thrust is the force produced by the rocket engine pushing exhaust gases in the opposite direction, following Newton's third law of motion (action and reaction). This thrust overcomes the force of gravity and allows the rocket to lift off and move upwards.
Choice A, gravitational force, is incorrect as gravity pulls objects towards the Earth, and in this case, the rocket is moving against gravity.
Choice B, air resistance, is incorrect because it opposes the motion of the rocket and is more relevant during descent rather than ascent.
Choice D, normal force from the launchpad, is incorrect as this force acts perpendicular to the surface and does not propel the rocket upwards.

Correct Answer: B

Rationale: Homozygous refers to an organism with two identical alleles for a gene, either both dominant or both recessive. Heterozygous, the correct answer, refers to an organism with two different alleles for a gene, one dominant and one recessive. Dominant and recessive describe the relationship between alleles, where dominant alleles are expressed over recessive alleles in heterozygous individuals.
Therefore, the term for an organism with two different alleles for a gene is 'heterozygous.'